Crystal chemical and IR spectroscopic studies of intermolecular interactions in potentially prototropic organic crystals of N-substituted benz(isonicotine) hydrazides

被引:3
作者
Chuev, II [1 ]
Atovmyan, EG [1 ]
Aldoshin, SM [1 ]
机构
[1] Russian Acad Sci, Inst Chem Phys Chernoglovka, Moscow 142432, Russia
关键词
N-substituted benzhydrazides; N-substituted isonicotinehydrazides; intermolecular interactions; intermolecular hydrogen bond; crystallization;
D O I
10.1016/S0022-2860(98)00571-7
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
From crystal chemical analysis of potentially prototropic N-furfurylidene (thienylidene) benzhydrazides, it was found that increasing the benzhydrazide molecular volume by S --> O replacement in the five-membered ring causes the formation of crystals with space group of lower symmetry (Pbca --> P2(1)/b). The presence of two proton acceptor centres in N-furfurylidene (thienylidene) isonicotinehydrazide (IH) molecules (N-Py and C=O) leads to the occurrence of one of two types of intermolecular hydrogen bond (IB) ( > C=O...HN < and > N-Py...HN <) depending on the crystallization conditions. The process of IH crystallization was studied by a crystal chemical approach. Analysis of the N-H valence vibration intensity for IH showed that specific CH...O and S...O intermolecular interactions play an important role in cooperative interactions of > N-Py...HN < IB. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:177 / 186
页数:10
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