Meng, Zhao-Sha; Yun, Lei; Zhang, Wei-Xiong; Hong, Chao-Gang; Herchel, Radovan; Ou, Yong-Cong; Leng, Ji-Dong; Peng, Meng-Xia; Lin, Zhuo-Jia; Tong, Ming-Liang published the article 《Reactivity of 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole, structures and magnetic properties of polynuclear and polymeric Mn(II), Cu(II) and Cd(II) complexes》. Keywords: manganese cadmium pyridinyl aminotriazole azide complex preparation structure magnetism; copper pyridinyl aminotriazolate azide benzenetricarboxylate complex preparation structure magnetism; crystal structure manganese copper cadmium pyridinyl aminotriazole triazolate benzenetricarboxylate; magnetic property manganese copper pyridinyl aminotriazole triazolate azide benzenetricarboxylate; deamination pyridinyl aminotriazole copper complex.They researched the compound: 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine( cas:1671-88-1 ).Safety of 3,5-Di(pyridin-2-yl)-4H-1,2,4-triazol-4-amine. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1671-88-1) here.
Five new complexes were obtained from solution or hydrothermal reactions of M(OAc)2 (M = Mn, Cu and Cd) or CuCl2 with 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole (abpt) and NaN3 or 1,3,5-benzenetricarboxylic acid (btcH3) in different molar ratios. Structural anal. reveals that Cd(abpt) units in [Cd(abpt)(μ1,1-N3)2]n (1) are bridged by double μ1,1 end-on (EO) azides into 1-dimensional zigzag coordination chains. Similar structural motifs, i.e. the chelation of abpt to the metal center and the double bridges of EO azides, are found in [Mn4(abpt)4(μ1,1-N3)8(H2O)2] (2). The terminal aqua mols. and the monodentate N3- groups give a tetranuclear complex rather than a polymeric compound The abpt underwent deamination in the presence of copper ions during the process of coordination and became 3,5-bis(pyridin-2-yl)-1,2,4-triazolate (bpt-H) in 3-5. [Cu4(bpt-H)4(N3)4]·4.5H2O (3) is a neutral tetranuclear grid-like complex, in which the azides act as monodentate ligands. A similar [Cu4(bpt-H)4]4+ grid-like unit was found in [Cu4(bpt-H)4(μ-btcH)Cl2]·2H2O (4) and a pair of symmetry-related copper atoms are bridged by the μ-btcH2- coligand in a butterfly-shaped structure. In [Cu2(bpt-H)(μ6-btc)(H2O)]n (5), the tetranuclear {Cu4(μ-bpt-H)2(μ3-carboxylate)2}4+ units are bridged by μ6-btc3- ligands in a 2-dimensional step-like layer structure. Temperature-dependent magnetic susceptibility measurements reveal that the double μ1,1-N3- bridges in 2 transmit the ferromagnetic interactions between Mn2+ centers (J1 = J2 = +3.09(4) cm-1, gMn(ii) = 2.02(1)), and the μ-(bpt-H)- bridges transmit moderate antiferromagnetic interactions in both 3 (J = -12.78(13) cm-1) and 4 (J1 = -14.96(11) cm-1). In 4 the antiferromagnetic coupling via the μ-btcH2- bridge is the 2nd coupling pathway (J2 = -9.48(7) cm-1). The coexistence of ferromagnetic and antiferromagnetic coupling between four Cu2+ centers occurs in 5 (J1 = -0.88(3) cm-1 and J2 = +5.01(2) cm-1). The magneto-structural relation for tetranuclear copper pyrazolate/triazolate compounds is discussed.
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Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem