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

Twelve metal coordination compounds with two triazole derivatives, namely, {[Mn(HATr)(2)](ClO4)(2)}(n) (1), [Mn(HATr)(3)]Cl(ClO4) (2), [Co-3(ATr)(6)(H2O)(6)](ClO4)(6)center dot 4.5H(2)O (3), [Co(HATr)(3)]Cl(ClO4) (4), [Co2Cl2(HATr) (2)(H2O)(2)(CH3OH)(2)]Cl-2 center dot 2H(2)O (5), [Ni-3(ATr)(6)(H2O)(6)](ClO4)(6)center dot 4.5H(2)O (6), [Ni(HATr)(3)]Cl(ClO4) (7), [Ni2Cl2(HATr)(2)(H2O)(4)](ClO4)(2)center dot 4H(2)O (8), [Ni-2(HATr)(2)(H2O)(6)](ClO4)(4)center dot 2H(2)O (9), {[Zn(HATr)(2)](ClO4)(2)}(n) (10), [Zn(HATr)(3)]Cl(ClO4) (11), and {[Cd-4(HATr)(8)](CdCl4)Cl-2(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 trinudear 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.