Remarkable structural transformation of Zn(tza)(2) during recrystallization, syntheses and crystal structures of M(tza)(2) (M = Zn, Cd, Mn, Co; Htza = tetrazole-1-acetic acid)

Dong  WW; Zhao  J; Xu  L

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Remarkable structural transformation of Zn(tza)(2) during recrystallization, syntheses and crystal structures of M(tza)(2) (M = Zn, Cd, Mn, Co; Htza = tetrazole-1-acetic acid)

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The substitution reactions of M(CH3CH2CO2)(2) and Htza afford the crystalline precipitates-of Cd(tza)(2) (1), Mn(tza)(2) (2), Co(tza)(2) (3), and beta-Zn(tza)(2) (5). The recrystallization of 5 leads to the formation of alpha-Zn(tza)(2) (4). X-ray powder diffraction of 1-5 reveal that 1, 2, 3, and 5 are allomers, but 4 and 5 are isomers, revealing the unprecedented structural transformation during the process of recrystallization. Compounds 1-4 have been characterized by X-ray single-crystal crystallography, IR, and magnetism analysis. Structural analyses and comparison of 1-4 detail the structural evolution of from beta-Zn(tza)(2) (5) to alpha-Zn(tza)(2) (4) and possible driving force has been proposed. The interactions between the Mn-II ions of 2 have been observed as weakly antiferromagnetic.

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《Crystal growth & design》 |2008年第8期|2882-2886|共5页
作者
Dong WW; Zhao J; Xu L;
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作者单位

Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China;

Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China;

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正文语种英语
中图分类晶体学;
关键词
POWDER DIFFRACTION DATA; X-RAY-DIFFRACTION; COBALOXIME COMPLEXES; MAGNETIC-PROPERTIES; STATE REACTION; SPIN-CROSSOVER; RACEMIZATION; POLYMERS; BRIDGE; COPPER(II);

Remarkable structural transformation of Zn(tza)(2) during recrystallization, syntheses and crystal structures of M(tza)(2) (M = Zn, Cd, Mn, Co; Htza = tetrazole-1-acetic acid)

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