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Structural Diversity and Properties of M(II) Coordination Compounds Constructed by 3‑Hydrazino-4-amino-1,2,4-triazole Dihydrochloride as Starting Material

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posted on 04.01.2016, 00:00 by Caixia Xu, Jianguo Zhang, Xin Yin, Zhenxuan Cheng
Twelve metal coordination compounds with two triazole derivatives, namely, {[Mn­(HATr)2]­(ClO4)2}n (1), [Mn­(HATr)3]­Cl­(ClO4) (2), [Co3(ATr)6­(H2O)6]­(ClO4)6·4.5H2O (3), [Co­(HATr)3]­Cl­(ClO4) (4), [Co2Cl2(HATr)2­(H2O)2(CH3OH)2]­Cl2·2H2O (5), [Ni3(ATr)6­(H2O)6]­(ClO4)6·4.5H2O (6), [Ni­(HATr)3]­Cl­(ClO4) (7), [Ni2Cl2(HATr)2­(H2O)4]­(ClO4)2·4H2O (8), [Ni2(HATr)2­(H2O)6]­(ClO4)4·2H2O (9), {[Zn­(HATr)2]­(ClO4)2}n (10), [Zn­(HATr)3]­Cl­(ClO4) (11), and {[Cd4(HATr)8]­(CdCl4)­Cl2(ClO4)4}n (12), when HATr = 3-hydrazino-4-amino-1,2,4-triazole and ATr = 4-amino-1,2,4-triazole, were prepared under diverse conditions and structurally characterized. Compounds 1, 10 and 12 exhibit one-dimensional zigzag chain structures; 2, 4, 7, and 11 possess mononuclear structures; 3 and 6 display trinuclear structures, while 5, 8, and 9 feature binuclear structures. Hydrogen bonds link these compounds into three-dimensional structures. The thermal stability and energetic properties also were determined.

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