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    24 April 1982, Volume 3 Issue 2
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    Articles
    THE CHEMISTRY OF BORATE IN SALT LAKE BRINE (I)——BEHAVIOUR OF BORATE DURING SOLAREVAPORATION OF BRINE
    Gao Shiyang, Li Gouying
    1982, 3(2):  141-148. 
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    In this paper, we have studied behavior of borate during solar evaporation of brine. The solar evaporation of the borate-containing brine indicates that the crystallization of salts does not accord with Van'thoff's stable equilibrium diagram, but agrees with Kurnakov's solar evaporation diagram.The number of concentrated times of brine (W0brine/Wbrine) equals to that of boron enrichment (Cboron/C0boron) in concentrated brine during solar evaporation. It may be considered that the borate does not generally crystallize out till the stage of bischofite, and accumulates fully in the concentrated brine.
    THE SOLVENT EXTRACTION OF THE RARE EARTH ELEMENTS WITH THE BIDENTATE HETEROCYCLIC AMINE LIGANDS
    Yang Luoqing, Ni Zhaoai
    1982, 3(2):  149-154. 
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    The solvent extraction behaviour of the 15 rare earth elements (III)in the form of ternary complexes with varities of the bidentate heterocyclic amine ligands L (where L = 4,7-diphenyl-1,10-phenanthroline, 5-NO-1, 10-phenanthreline, 2,9-dimethyl-l, 10-phenanthroline; 2,9-dimethyl-4, 7-diphenyl-l, 10-phenanthroline and 2,2-bichinoline, respectively) and anion A (where A = trichloreacetate anion, CCl3COO-) as extractants has been investigated in the system of chloroform-water. In all the systems, the 'tetrad effect' hasbeen observed apparently during the extractions. As pHvalues in the media vary, the extraction effectiveness of the RE (III) will change. The chemical composition of the extracted compounds has been determined as RE(CCl3COO)2 A·2DPP (where A=Cl- or CH3COO-, DPP = 4,7-diphenyl-l, 10-phenanthroline in the system of RE3+ /HCl-H2O/ CCl3COO--DPP/CHCl3, buffering by CH3COOH-CH3COONa.) The effects of molecular weights and structures of Lon extraction have been found as follows:The extraction effectiveness of RE (III) is raised with the increasing of molecular weights of ligands L, and reduced with the introduction of the -NO2 group attracting electrons into L's molecules. The steric hindrance of the ligands Lwill greatly inhibit the extraction of the RE (III). The determination of the distribution ratios Dof RE (III) between chloroform and water phases is carried out by means of spectrophotometric method, the reagent arsenazo-Ibeing used as an indicator. The results have been tested by radiometric analysis, the isotopes147Ce,152,154Eu and 170Tm being empl, yed, if necessary.
    STUDIES ON THE CERIUM-TUNGSTEN HETEROPOLY ACIDS AND THEIR SALTS (I)——PREPARATION OF 12-TUNGSTOCERIC ACIDSBY ION EXCHANGE METHODS
    Wang Enbo, Zhao Shiliang, Zhou Yanxiu, Liu Jingfu, Zheng Ruli
    1982, 3(2):  155-161. 
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    We have for the first time prepared solutions of 3 stable cerium-tungsten heteropoly acids. Their anionic constitutions are CeW8O284-, CeW10O356-, and CeW12O428-. Preparation conditions of these heteropoly acids have been studied.Solid 12-tungstoceric acid has been isolated by the use of ion exchange-acidification method and examined with infrared spectrography, X-ray diffraction and differential thermal analysis.
    STUDIES ON ALKALI METAL PROMOTED IRON CATALYST FOR AMMONIA SYNTHESIS (V)——EFFECT OF CHLORIDE ION
    Xin Xinquan, Zhu Longgen, Meng Qingjin, Zhang Xueqin, Wu Peicheng, Dai Anbang
    1982, 3(2):  162-168. 
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    This report points out that chloride ion is a poison for iron catalyst of ammonia synthesis promoted by alkali metal. Results of the experiment on adding KCl to the system Fe-AC (active carbon)-Kshowed a very marked decrease in catalytic activity (Fig. la), while the addition of KCl to the system, Ru-AC-K, activity decreases much less (Fig. lb), indicating that chloride ion is a poison for iron catalyst but has little effect on ruthenum catalyst for ammonia synthesis.Gas chromotographic study on Fe2(C2O4) S-AC and Fe2(C2O4)3-KCl-AC systems showed that in hydrogen atmosphere the decomposition of the iron salt took place at different temperatures. In the system that contained KCl, the decomposition products COand CO3 appeared at a higher temperature (Fig. 2a, 2b). In hydrogen atmosphere, the reduction of FeOfrom pure Fe2(C3O4)3 crystals was almost completed at 300-420℃, but FeOof the Fe2(C3O4)3-AC system was reduced only slightly even at 500℃. Under the same condition, FeOfrom the Fe2(C3O4)3-AC-KCl system was reduced much more as indicated by the amount of water evolved (Fig. 2c). It was therfore postulated that the presence of KCl lowered the degree of dispersion of FeO and made it more easily reduced to form large particles of a-iron of low or no catalytic activity.X-ray diffraction study of the catalysts by the powder method revealed that the product of the decomposition of Fe2(C3O4)3-KCl-ACgave the characteristic spectrum of a-iron(Fig. 3) while that of Fe2(C3O4)3-ACgave no spectrum. It was also found, by comparing the Mossbauer spectra of the two systems, that in the catalyst from Fe2(C2O4)3-KCl-ACsystem the spectral lines of the fine particulate a-iron in paramagnetic region which corresponded to high catalytic activity disappeared.In conclusion, it is considered probable that the poisonous effect of chloride ion is due to the agglomeration of the superfine particles of a-iron which are the active centers of the catalyst for ammonia synthesis and ruthenum catalyst is much less sensitive to this agglomeration effect.
    A NEW ROUTE TO LITHIUM ALUMINIUN HYDRIDE (LiAlH4)
    Shen Panwen, Zhang Yunshi, Chen Shengchang, Yuan Huatang, Che Rongrui, Ban Yuexia, Liu Dingrong
    1982, 3(2):  169-172. 
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    A mixture (LiH + NaCl) of lithium hydride and sodium chloride was produced by the reaction of lithium chloride and metallic sodium in an atmosphere of hydrogen at slightly elevated temperature and used to synthesize lithium aluminium hydride by the usual Schlesinger method. The by-product of the reaction was a mixture of lithium chloride and sodium chloride, which was separated by various methods and the lithium chloride obtained was recycled.
    SPECTROPHOTOMETRIC STUDY ON THE REACTION OFRARE EARTHS-O-PHENANTHROLINE-CHROMAZUROLS-AMPHOTERIC ACTIVE AGENT SYSTEM
    Shi Huiming, He Xiwen, Li Jinhe
    1982, 3(2):  173-180. 
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    The mechanism of reaction between rare earths (RE) and Chromazurol S (CAS) ,o-phenanthroline (o-phen.) in the presence of amphoteric active agent (DDMAA) has been studied spectrophotometrically.The results show that the maximum absorption is obtained at the point at which the concentration of DDMAA reached the CMC. Thus, it can be seen that the formation of micelles appears to have an important effect on complex reaction. The amphoteric active agent is in the form of cationic species which was proved by examining the electronic nature of DDMAAand the complex.The molar ratio of the four components in the complex is estimated to be Y:o-phen:CAS:DDMAA = 1:l:2:4 and the possible structure of the complex is proposed.
    A NEW CHELATE-FORMING RESIN BEARING XYLENOL ORANGE GIROUP AND ITS APPLICATION
    Zhou Zhirui, Mao Xueqin
    1982, 3(2):  181-187. 
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    Anew chelate-forming resin bearing xylenol orange group was prepared by stirring a solution of xylenol orange (XO) with a common anion exchange resin.For the preconcentration of trace heavy metal ions in natural water, the adsorption and desorption behavior of Cu, Zn, Cd, Fe-XOchelates onto an anion exchange resin (Cl-form) by column method was studied, and the atomic absorption spectrophotometric determination of these heavy metals in natural water was established.By this method the recoveries of Cu, Zn, Cd, Fe were 94.3-103, 100-103.6, 90-107, 92-100, respectively, the relative standard deviations for Cu, Zn, Cd, Fe were ±3.4,±2.2, ±1.5, ±0.74% respectively.
    APPLICATION OF PORPHYRIN IN ANALYTICAL CHEMISTRY (I)——SPECTROPHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF COPPER WITH TETRAKIS-(4-TRIMETHYLAMMONIUMPHENYL) PORPHINE
    Yang Kerang, Zhang Chuanyou, Cheng Jieke
    1982, 3(2):  188-194. 
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    In this paper, the complex reaction of water-soluble α, β, γ, δ-tetrakis-(4-trimethylammoniumphenyl) porphine[T(4-TAP)P] with copper( I ) has been studied. The porphyrin was found to be a highly sensitive and highly selective reagent for direct spectrophotometric determination of copper at ng level. The Soret band of the complex lay at 411 nm(ε= 4.0 × 105), which is well separated from that of the reagent(431nm,ε = 4.7 × 105) below pH2. The complex formation is slow at room temperature and pH4.5, however, it can be accelerated by heating and completed within 5 min at 100℃. The sensitivity of the reagent and the complex for absorbance 0.001 were 0.13 ng Cu cm-2 and 0.16ng Cu cm-8 respectivly. 27 determinations of standard solutions containing 0.016μg ml-1 of copper gave a relative standard deviation of±1.8%. The interference of many ions and salts have been examined and found to be minimal. Large amounts of rare earth do not interfere with the determination. The simple and rapid methods established could be applied to the direct spectrophotometric determination of trace amounts of copper in high-purity rare earth samples and water samples with satisfactory result.
    HPIEC SEPARATION OF THE RARE EARTH ELEMENTS AND DETERMINATION OF Lu, Yb AND Tm
    Fan Biwei, Liu Mancang, Hu Zhide
    1982, 3(2):  195-204. 
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    The 13 rare earth elements were rapidly separated within an hour by using the cation exchange resin of China-made type of YSG-Na, the high speed ion exchange chromatograph of China-made type of SY-202 with a coulometric detector, and a simple out-gradient apparatus installed by us. a-HIBAwas used as eluant. The concentration and pHvaried simultaneously in the given gradient condition.
    STUDIES ON THE CATHODIC STRIPPING VOLTAMMETRY OF IODINE
    Song Hongzi, Wang Naixing
    1982, 3(2):  205-209. 
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    The cathodic stripping behaviour of iodide films at the hanging mercury drop electrode in a series of electrlytes and the use of complexing agent as masking agent have been investigated. Under the experimental conditions without complexing agent, heavy metal elements showed serirus interference. The interference from less than 1000-fold molar amounts of Zn(II), Cd(II), Pb(II) and less than200-fold molar amounts of Cu(II) could be eliminated by the complex formation of those with EDTA, DCTAor DTPA, The optimum condition for the determination of iodide is as f ollowsielec-trolyte 0.02M EDTA (0.01M DCTAor 0.02M DTPA), deposition potential -0.05V (vs. Ag-AgCl), deposition time 2 min., voltage-sweep rate 100mV/sec. Afair reproducibility is obtained in the above procedure and a good proportionality between the peak values of the cathodic stripping current and iodide concentration (10-6 - 5× 10-8M) has been observed. The detection limit is 6.3×10-9M, The recommended method was sucessfully applied to the direct determination of trace iodine in drinking water and common salt. For tap water a mean value of 14.6 ppb I- was found, while for mineral water the value was 156 ppb I-, and for the common salt, was 977 ppb I-. The relative standard deviation for iodine is 3.85%, 3.24%, 1.5% respectively.
    THE PREPARATIONS AND REACTIONS OF THECONDENSED PRODUCTS FROM 4-FORMYL-2, 2, 5,5-TETRAMETHYL-TETRAHYDRO-3-FURANONE
    Yu Zhenhua, Yin Chcnglie
    1982, 3(2):  210-216. 
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    The fully substituted furanone [I] condensed easily with amines to form the corresponding products, and in the case of methyamine, depending on the solvent used, gave the mono- or bimolecular furanone condensed products. These products were readily hydrolysed in aqueous acids, regenerating the amines and [I].All the condensed products obtained could not be methylated with methyl iodide or diazomethane, due to the presence of an "inserted ethylenic linkage" in the amide molecule. By oxidation with hydrogen peroxide, a dicarboxylic acid [K] (which less by one methylene group) was obtained, and treating with acetoacetic ester, a derivative of pyridine [V] was formed via the intermediate [VI].Addition of Grignard reagent to condensed products gave 1.4-addition products [IV], which was proved by relevant synthesis.
    RESEARCH ON 2, 6-DISUBSTITUTED BENZO-BISOXAZOLES (Ⅳ)——THE HMO CALCULATION AND THE SUBSTITUENT EFFECT ON THE SPECTRA OF 2, 6-DISTYRYL-BENZO-BISOXAZO-LES AND THEIR PARA-SUBSTITUTED DERIVATIVES
    Cai Zunsheng, Wu Benxiang, Zhou Yimin, Zhao Xuezhuang, Gao Chenheng
    1982, 3(2):  217-223. 
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    2, 6-Distyryl-benzo[l,2d; 4,5d']bisoxazoles, 2,6-Distyryl-benzoCl ,2d; 5, 4d/]bisoxazoles, and some of their para substituted derivatives were treated with HMO method. The relevant energy levels and molecular diagrams were obtained. The substituent effect on UVabsorption spectra and FLemission spectra were analyzed and approached by some quantum chemistry methods on the basis of HMO theory.
    ON THE ELECTRONIC BAND STRUCTURE OF BINARY SEMICONDUCTORS
    Zhao shen, Zhao Yuan
    1982, 3(2):  224-228. 
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    The band structures of ten semiconductors of A,ABand AB2 types have been calculated by LCBO MO method. The results showed that the band gaps Eg can generally be expressed as a linear function of the bond energy and the resonance integrals between the neighbouring bonds, irrespective of the covalent structural types of the semiconductors. This provides a theoretical background for the empirical expressions between Eg and some properties of the chemical bonds reported in the literature.
    THE CRYSTAL STRUCTURE OF HYDROCHLORIC ACID SALT OF 4-(2-PYRIDYLAZO)RESORCINOL
    Xu Xiaojie, Li Genpei, Zhang Zeying, Tong Shenyang
    1982, 3(2):  229-234. 
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    The crystal structure for the hydrochloric acid salt of 4-(2-pyridylazo) resorcinol has been determined from three dimensional X-ray data collected by Syntex P3/R3 four circle diffractometer. The crystal is monoclinic with space group P21/c, a = 11.339Å, b = 6.835Å, c = 18.170Å, β= 102.8°and Z = 4. The crystal structure has been solved by Patterson and direct method and refined by block least square refinement with positional parameters, anisotropic temperature and scale factor for nonhydrogen atoms. The final Rfactor is 0.055. The result of crystal structure analysis shows that all the nonhydrogen atoms in the molecule of 4- (2-pyridylazo) resorcinol are coplanar and form an overall conjugate system. The chloride ion and the water molecules in the crystal form hydrogen bonds with the N,Oatoms in molecule and join up the molecules of 4-(2-pyridylazo)resorcinol.
    KINETICS OF ION EXCHANGE IN POLYDISPERSE SYSTEMS (I)——RATE LAWS FOR PARTICLE-DIFFUSION OR FIRM-DIFFUSION CONTROLLING ISOTOPIC EXCHANGE
    Xing Zheng, Tao Zuyi
    1982, 3(2):  235-242. 
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    In the earlier theoretical treatment, it is usually assumed that all beads of ion-exchanger are spherical and uniform in size.So far the rigorous treatment of isotopic exchange reaction with nonuniform spherical particles has not been given. In this paper, the kinetics of isotopic exchange reaction in systems simultaneously involving ion-exchanger particles of different radii is investigated.The theoretical expressions of polydisperse systems for particle-diffusion control or film-diffusion control have been deduced to predict the fraction of heterogeneous isotopic exchange between ion-exchangers and ions in a solution of finite volume. These expressions have been calculated by computer. It is shown that the smaller particles, reacting more rapidly all the time, will overshoot their eventual equilibrium value and, therefore, they have to release, after some time, a considerable amount of these isotopes already absorbed in favor of the slower reacting particles. Some other conclusions have also been drawn.
    STUDIES ON THE KINETICS AND MECHANISMOF β-TYPE REACTION OF HEAVIER RAREEARTHS WITH CHLOROPHOSPHONAZO (Ⅲ)
    Lin Zhixin, Zeng Yune
    1982, 3(2):  243-250. 
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    Under a certain experimental condition, a-type of heavier rare earths chelates of chlorophosphonazo (III) can be converted to β-type. In continuous scanning spectrogram, it is shown that α-type is formed instantaneously. The α-peaks decline and the β-peak raises when the reaction is in process. when Yb:R = l:1 and pH = 3.2, we had determinated at constant temperature that the order of reaction is equal to 2 and 1 for nonbuffer system and buffer system (NaAc-HCl) while apparent activation energy is equal to 71.7 KJ/mol and 49.8KJ/mol, respectively. For many buffer systems of interest, it is clear that buffer medium of having nucleophilic groups can accelerate the converted process. In these buffer systems the observed formation rate of β-type chelates decreases with increasing of hydrogen ion concentration and increases with the buffer medium concentration. The experimental result tells us that two a-type molecules combine into a β-type molecule and liberate a proton at the same time.
    GENERAL PROGRAM FOR AB INITIO SCF MO CALCULATIONS OF ORGANIC MOLECULES AND SELECTION OF BASIS SETS FOR C AND H ATOMS
    Wang Demin, Deng Kunzie, Zhu Zhixian, Han Yuzhen, Shi Nai, Wu Rongzhi, Li Lemin, Hsu Kwang-Hsien
    1982, 3(2):  251-256. 
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    In the present investigation we have written in Beida 6912 Language a general program for Ab Initio SCF MOcalculations of organic molecules similar to but simpler than Gaussian70. We have also proposed a new minimum atomic orbital basis set for Cand Hatoms, and with the help of this set the total energy of methane molecule can be calculated to be E = -40.1662 hartree superior to those obtained using STO-6G (E = -40.1011) and 4-31G (E = -40.1395). In order to improve the total energy we have put a floating GTOon each C-Hbond and obtained E=-40.1930, quite near the estimated Hartree-Fook Limit E = -40,22 hartree.
    ON THE OPEN CIRCUIT POTENTIAL AND STABILITYOF REGENERATIVE PHOTOELECTRO-CHEMICAL ELECTRODES
    Dong Qinghua, Wu Yue, Cha Chuan-sin
    1982, 3(2):  257-263. 
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    Both the open circuit potential and stability of an illuminated photo-electrochemical electrode depend on the composition of electrolytic solution in which the electrode is immersed. The open circuit potential varies linearly with the logarithm of light intensity. The potentials of n-type semiconductor photoelectrodes shift to more positive values as the concentrations of oxidants in solutions increase, but they are almost unaffected by the concentrations of the reductants. Formula of photopotential was derived to explain these phenomena. Hysterisis of photopotential was observed in certain solutions. This phenomenon is explained by the split of Fermi-levels within surface layers of illuminated photoelectrodes.
    STUDIES ON THE BIOCHEMICAL EFFECTS OF CROWN ETHERS (Ⅲ)——THE EFFECTS OF FIVE CROWN ETHER DYES ON THE TRANSPORT OF ISOTOPES K+, Na+ AND Ca++ IN WHEAT ROOTS
    Zhou Aitang, Fu Tingzhi, Ou Huichun, Huang Depei, Wang Defen, Zhang Jinqi, Huang Liangbao, Que Rusheng, Zhang Zhengren
    1982, 3(2):  264-270. 
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    The ion-selective electrode and isotope tracing technique arc applied in this study of metal ion transport in plant roots. The transport process in living plants can be followed continuously.With isotope tracing and ion-selective electrode technique, the influence of five crown ether dyes on transport process of the K+, Na+ and Ca++ in wheat root system was studied.Preliminary investigation indicated that five crown ether dyes in very low concentrations (1×10-3M) promoted the transport of potassium ion; on the other hand, the effect of 5 crown ethers on the absorption of sodium and calcium ion by wheat root system was irregular, some absorbed more and some less than the control group. The 4-(N, N-dimethyl-amino-benzene) -1- azo-4-benzo-15-crown-5 was the most effective among the five crown ether dyes.When the root system of single, young wheat was treated with dilute solution of a crown ether dye, 4-(N, N-dimethyl-amino-benzene)-l-azo-4-benzo-15-crown-5, the dye penetrated through the cell membranes of the roots and was absorbed on the sufaqe of micelles.
    DETERMINATION OF SOLUBILITY PARAMETER OF POLYSTYRENE BY TLC METHOD
    Song Xubing, Xu Chengwei
    1982, 3(2):  271-274. 
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    In this paper, the solubility parameter of polystyrene has been determined by TLC. It's value is found to be 9,10 (cal./cm3)1/2 , which is quite agreeable with the reported ones obtained by other methods. This method is simpler and more convenient than others. Therefore, we consider it to be good means for the determination of the solubility parameter of polymers.
    THE GROWTH OF LARGE SINGLE CRYSTALS OF ZEOLITE ZSM-5
    Long Yingcai
    1982, 3(2):  275-278. 
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    According to the patent[5], the size of zeolite ZSM-5 crystals obtained in the system of (TPA)2O-Na3 O-Al2O3-SiO2-H2O is merely about 1 Mm. The growth of ZSM-5 single crystals is investigated by the author in the system diethanolamine (DEA)-Na2O-Al2O3-SiO2-H2O and batch samples (3 g each) of maximum size 50 × 50 × 120μmi (Fig. 1) can be obtained, They are transparent and perfect, suitable for X-ray crystal structure determination and diffusion measurement. Raw materials used are water glass, Al2,(SO4)3, H2SO4, and DEA. Proper amount of DEAis added to 30g of water glass, which has been filtered carefully beforehand. Gel (1) is formed. Fixed amounts of Al2(SO4)3, H2O and DEA are mixed, forming gel (2). Then gel (1) and (2) are mixed again. The mixture is poured into a hard glass tube and crystallized statically at about 160 to 220℃ in a small autoclave for 50 to 300 hours until crystallization is completed.DEAnot only acts as the "template" to initiate the formation of ZSM-5 but also serves as a buffering or complexing agent. However,the spontaneous crystallization in the DEAsystem always contains Mordenite and a-SiO2. Adding seeds (<1 μm in size) obtained by grinding the single crystals of ZSM-5 can obviously improve the purity of ZSM-5. Pure ZSM-5 of 20×20×50μm in size is produced by adding more seeds. The size is obviously increased by adding fewer seeds. Small Amounts of other phase appeared during the later period of crystallization can be removed by elutriation and shifting. The perfection of the single crystals can be improved by adding glycerine to the reacting mixture.In the system of DEA, the compositions of reaction mixture for growth of single crystals have the following ranges (in terms of mole ratios): H2O:SiO2 = 200 to 600; OH:SiO2 = 5 to 20; SiO2: Al2O3 = 50 to 150; DEA:SiO2 = 0.4 to 4. Better materials for the autoclave wall are hard glass (GGl7),quartz glass and high purity graphite.Stainless steel produces smaller crystals while Teflon forms large quantities of a-SiO2.The species of "Templete" molecules exerts great influence. Methylamine forms smaller crystals of less than 20 um in size. Ethylamine, n-propyla-mine, ethylene diamine, 1, 6-hexamethylene diamine and tetraethylene pentamine produce primarily blocks of polycrystals. Afew crystals, having large size and regular shape, are less perfect. It is difficult to obtain single crystals of good quality and large size by means of methanol, ethanol, n-butanol and ammonia. The effect of triethanolamine and ethanolamine is less than DEA.Some Xpenetration twins are observed. Uniform interference colors from tangerine to greenish blue appear on the single crystals of ZSM-5 between crossed polars of microscope with Gypsum plate. However, this uniform interference color has not been observed on blocks of polycrystals. The clear diffraction spots are shown on the X-ray single crystals Laue photograph. The peaks of X-ray powder diffraction pattern are fine and have high resolving power. The lines of CuKa and CuKa can be resolved at about 45° (2μ).The measured specific gravity of single crystals ZSM-5 is 2.05. Its chemical composition is. Al2O3 = 3.15%; SiO2 = 83.41%; Na2O = 0.26%; N = 1.09% ;SiO2: Al2O3(mol) = 45. So, the composition of unit cell is Na 0.6 (HOC2H4)3NH2) 5.1(Al4Si92O192)·16H2O. After calculation for 11 hours at about 540℃, the surface area measured is 497.2M2/g and the adsorption of water is 8.2% wt.The autor is grateful to Professors Xu Ru-Ren and Xu Guo-Xian for their guidence.
    Preface
    SYNTHESIS OF ETHEREAL DERIVATIVES OF o-CARBORANE
    Zhang Zhengzhi, Shen Panwen
    1982, 3(2):  279-280. 
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    Presented here is a note for the preparation of two new o-R(Ar) OCH2CB10 H10CH2O(Ar)R  compounds by treating B10H12 [(C3H5)2S]2 with R(Ar) OCH2C = CCH2O(Ar)R. Through this synthesis, the scope of application of the direct synthesis of substituted o-carborane derivatives from RC≡CR compounds has been enlarged.
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