Syntheses and structural studies on copper(II) complexes derived from ethyl(2-benzothiazolyl)aminoformate

Abstract

The reaction of copper(II) acetate with ethyl(2-benzothiazolyl)aminoformate (HL) gave red crystals of [Cu 2L 4] 2 ( 1). When complex 1 was treated with pyridine (Py) in chloroform/toluene, red crystals of CuL 2(Py) 2 ( 2), were deposited. Both complexes have been characterized by single-crystal X-ray diffraction methods, showing that the binuclear complex 1 has the copper atoms each located in a four-coordinate square-planar geometry of N 4, with two independent molecules in an asymmetric unit. The average bond distances of CuN(amine) and CuN(bta) (bta = benzothiazoyl) are 1.98 and 2.07 Å, respectively. Complex 2 is mononuclear with the Cu atom also in a square plane. The bond distances of CuN(py) and CuN(amine) are 2.011(4) and 1.997(4) Å, respectively.