FLEXIBLE DOUBLE BETAINES - MOLECULAR-STRUCTURES AND HYDROGEN-BONDING IN THEIR CRYSTALLINE HYDRATES

被引：26

作者：

WU, DD ^{[1
]}

MAK, TCW ^{[1
]}

机构：

[1] CHINESE UNIV HONG KONG,DEPT CHEM,SHA TIN,HONG KONG

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1994年 / 326卷

关键词：

D O I：

10.1016/0022-2860(94)08322-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Crystalline hydrates of three flexible double betaines, -OOCCH2N+Me2-(CH2)n-N+Me2CH2COO- (1 n = 2; 2 n = 3; 3 n = 4) have been isolated and characterized by single-crystal X-ray analysis. 1.2H2O crystallizes in the monoclinic space group C2/c with Z = 4; 2.3H2O and 3.2H2O are both triclinic, space group P1BAR, with Z = 2 and 1, respectively. The site symmetries of 1, 2 and 3 are C2, C1 and C(i), respectively. The formation of hydrogen bonds generated by water molecules bridging neighboring carboxy oxygen atoms in different modes leads to polymeric zigzag chains in the dihydrates of 1 and 3, and a layer structure in the trihydrate of 2.

引用

页码：193 / 202

页数：10

共 16 条

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