Synthesis, crystal structure, properties and thermoanalysis of complexes of Cu(ll) and Ni(ll) with taurine‐5‐chlorosalicylaldelyde schiff base

The reactions of transition metal salts with taurine 5‐chlorosalicylaldelyde Schiff base gave two complexes [Ni(TCSSB)(H 2 O) 3 ].H 2 O (1) and [Cu(TCSSB)(H 2 O) 2 ] 2 [Cu(TCSSB) 2 ].6H 2 O (2) (TCSSB=taurine‐5‐chlorosalicylaldelyde Schiff base), which were characterized by elemental analysis and X‐ray diffraction analysis. The complex 1 crystallized in monoclinic system with space group P 2 1 /c , and a =1.4816(2) nm, b= 1.3953(2) nm, c = 0.7466(1) nm, β= 100.499(3)°, V=1.5176(4) nm 3 , Z=4, and an infinite 3‐D network structure was formed by hydrogen bonds among sulfo group, crystal water and coordinated water. Complex 2 crystallized in triclinic system with space group P 1 , with the cell parameters: a = 0.6413(2) nm, b= 1.4596(3) nm, c= 1.6188(4) nm, a= 102.473(5)°, β= 98.979(4)°, γ=101.739°, V =1.4165(6) nm 3 , Z=1. The coordination environment between Cu(1) and Cu(2) is different. Cu(1) is slightly distorted square pyramidal while Cu(2) is distorted square‐plane. The complex 1 is mononuclear while the complex 2 is made up of two coordinated subunits, namely [Cu(TCSSB) 2 ] and [CU(TCSSB)(H 2 O) 2 ] 2 . Besides that the TG‐DTG of the complex 1 was analyzed, the thermal decomposition reaction of the complex was studied under a non‐isothermal condition by TG‐DTG. The TG and DTG curves indicate that the complex was decomposed in three stages:\documentclass{article}\pagestyle{empty}\begin{document} $$ [{\rm Ni}({\rm TCSSB})({\rm H}_2 {\rm O})_3] \cdot {\rm H}_2 {\rm O}\frac{{60 - 104 ^{\circ} {\rm C}}}{{ - {\rm H}_2 {\rm O}}}\to{\rm Ni}({\rm TCSSB})({\rm H}_2 {\rm O})_3 \frac{{110 - 155 ^{\circ} {\rm C}}}{{ - 3{\rm H}_2 {\rm O}}} \to {\rm Ni}({\rm TCSSB})\frac{{425 - 610 ^{\circ} {\rm C}}}{{ - {\rm TCSSB}}}\to{\rm NiO} $$ \end{document} .