Abstract
Crystal chemical and IR spectroscopic data for N′-substituted isonicotinic hydrazides (INH) of the general formula Py:C(:O):N(H):N′:C(H):R [R : thineyl, furyl, 5-nitrofuryl, and o-nitrophenyl] have been analysed. Crystalline compounds (hydrates, solvates, solvate hydrates, salts) of a specified composition and structure, i.e. a desired system of intermolecular hydrogen bonds, can be obtained by deliberately varying the solvent composition during synthesis or recrystallization. The systematic effects of substituent R on composition and structure of INH solvates and on their thermodynamic stability have been revealed.
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