Study on two coordination compounds using semicarbazide (SCZ) as bidentate ligand: [Ni(SCZ)₃](NO₃)₂ and Cu(SCZ) ₂Cl₂

Two coordination compounds have been synthesized using semicarbazide as ligand- [Ni(SCZ)₃](NO₃)₂ (1) and Cu(SCZ) ₂Cl₂ (2). (1) crystallized as the monoclinic, P2(1)/c space group, a = 10.832(2) Å, b = 9.980(2) Å, c = 13.801(3) Å, β = 102.89(3)°; (2) crystallized as the monoclinic, P2(1)/c space group, a = 7.541(1) Å, b = 9.275(1) Å, c = 6.875(1) Å, β = 101.48(1)°. In both compounds, semicarbazides coordinate to nickel(II) or copper(II) centers to form the 5-member ring system. With the intermolecular hydrogen bonds, molecules are linked together to form the three-dimensional packing diagrams. Thermal decomposition mechanisms of both compounds were predicted based on DSC, TG-DTG and FTIR analyses.