The Synthesis and Crystal Structure of Crown Ether with Heterohexaoxometalate Supermolecular Complexes

Abstract

Abstract: Two new supermolecular complexes of[Na(DB18C6)(CH₃OH)]:W₄Mo₂O₁₉·(DB18C6)·(CH₃OH)(1)and [Na(DB24C8)]₂W₁Mo₅O₁₉(Ⅱ)were synthesized, their structures were characterized by IR,¹H NMRand elementary analysis,and also determined by fourcircle X-ray diffractometer.The parameters of crystal structure of complex(Ⅱ)are :space group P2₁/c,α=1.8699(5)nm,b=1.9543(5)nm,c=2.2808(6) nm,β=112.87°,Z=4.It was shown that the formation of the two complexes is in different ways: DB18C8 is linked to polyoxometalate anion through C-O-Na-O-M (M= Wor Mo)long distant bonds, but DB24C8 with Na⁺ combined with anion by electronic interaction,It was also found that the crown ether with different radii of cavity selected different heterohexaoxometalate in which the occupation of Wand Mo is different to coordinate.

Key words: Crown ether, Heterohexaoxometalate, Supermolecule, Crystal structure

TrendMD:

LU Xiao-Ming, LIU Shun-Cheng, JIN Xiang-Lin. The Synthesis and Crystal Structure of Crown Ether with Heterohexaoxometalate Supermolecular Complexes[J]. Chem. J. Chinese Universities, 1996, 17(8): 1173.

References

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