CHARGE ALONE IS NOT SUFFICIENT TO CAUSE HELICATION WITH 2,2'-6',6''-6'',2'''-6''',2''''-QUINQUEPYRIDINE - CRYSTAL AND MOLECULAR-STRUCTURE OF 2,2'-6',6''-6'',2'''-6''',2''''-QUINQUEPYRIDINIUM BISHEXAFLUOROPHOSPHATE

被引：38

作者：

CONSTABLE, EC ^{[1
]}

ELDER, SM ^{[1
]}

WALKER, JV ^{[1
]}

WOOD, PD ^{[1
]}

TOCHER, DA ^{[1
]}

机构：

[1] UNIV LONDON UNIV COLL,DEPT CHEM,LONDON WC1H 0AJ,ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS | 1992年 / 03期

关键词：

D O I：

10.1039/c39920000229

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

2,2':6',2''':6''',2''':6''',2''''-Quinquepyridine (qpy) forms a shallow monohelical (1:1) complex with silver(I), but double-helical (2:2) complexes with first-row transition-metal ions, and the crystal structure of [H-2qpy][PF6]2 reveals that the cation is near-planar rather than helical, and adopts a cis, trans, trans, cis conformation about the interannular C-C bonds [P2(1)/a, a = 12.489(4), b = 17.308(7), c = 12.597(3) angstrom, beta = 93.92(2)-degrees]; the features leading to a helication are discussed.

引用

页码：229 / 231

页数：3

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