Structural and thermal properties of new copper and nickel single-source precursors

Abstract The synthesis and characterization of two novel copper and nickel coordination compounds with 2-aminobenzothiazole is reported. The crystals were obtained after adding solid 2-aminobenzothiazole to a methanol solution of Cu(CH 3 COO) 2 ·H 2 O and after adding a methanol solution of Ni(CH 3 COO) 2 ·4H 2 O to a methanol solution of 2-aminobenzothiazole. The products were characterized using single-crystal X-ray diffraction analysis, infrared spectroscopy and thermal analysis. The crystals of the compound bis(acetato- O )-bis(2-aminobenzothiazole- N )-copper(II), [Cu(O 2 CCH 3 ) 2 (C 7 H 6 N 2 S) 2 ] ( 1 ) and colorless crystals of bis(acetato- O )-bis(2-aminobenzothiazole- N )-nickel(II), [Ni(O 2 CCH 3 ) 2 (C 7 H 6 N 2 S) 2 ] ( 2 ) are stable in air. Non–covalent interactions including intra- and inter-molecular hydrogen bonds in both crystal structures are discussed along with the Jahn-Teller effect of the structures. Both of the compounds are acting as single-source precursors of nanostructured metal sulfides. Namely, thermal analysis showed that the final product of heating compound 1 –600 °C is nanocrystalline copper sulfide, Cu 9 S 5 , while the final product of heating compound 2 –1100 °C is nickel sulfide, Ni 3 S 2.