Chem. J. Chinese Universities ›› 2000, Vol. 21 ›› Issue (6): 888.

• Articles • Previous Articles     Next Articles

Studies on Transition-metal Complexes Containing the Scorpionate Ligand(Ⅰ) Synthesis,Characterization and Crystal Structure of Copper(Ⅱ) Complexes with Hydrotris[3-(p-methoxyphenyl( pyrazol-1-yl) )]borate

DENG Yuan, WANG Ru- Ji, L I Yong, SUN Shu- Qin, DING Ting- Zhen   

  1. Departmentof Chemistry, Tsinghua University, Beijing 100084, China
  • Received:1999-08-10 Online:2000-06-24 Published:2000-06-24

Abstract: A scorpionate ligand K[HB{pzAn}3]( pzAn=3-{p-methoxyphenyl}pyrazole) was prepared, which was reacted with one molar equivalent of Cu( O2 CMe)2 · H2 Oin THFat room temperature, yielding [Cu( O2 CMe) (HB{pzAn}3) ](Ⅰ) .But the reaction of K[HB{pzAn}3]with anhydrous Cu Cl2 afforded CuCl(pzAnH) (HB{pzAn}3) (Ⅱ) .The EPR spectra of Ⅰand Ⅱ in benzene solution exhibit a pseudoaxial symmetrical {dx2-y2}1 configuration at copper.Both Ⅰ and Ⅱ are characterized by IR, elementary analysis and CV.The crystal structure of compound Ⅱ has been determined.Crystals are monoclinic,space group P21/c with a=1 .1643( 2 ) nm,b=2 .7081 ( 5) nm,c=1 .4494( 3) nm,β= 10 5.37( 3)°,V=4.4066( 14) n m3 and Z=4,with final residuals R=0 .0604 and Rw=0 .1416.The complex shows a distorted square pyramidal copper center,and exhibits a weak intramolecular hydrogen bond,N_ H… Cl,with bond length of Cl… N 0 .300 9nm and bond angle of Cl… H _ N 12 0 .3°.

Key words: Poly( pyrazolyl) borate, Synthesis, Crystal structure, Intramolecular hydrogen bond

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