Title of article :
New platinum(II) complexes with benzothiazole ligands
Author/Authors :
Carmona-Negro´n, Jose´ A. University of Puerto Rico - Department of Chemistry, Puerto Rico , Cadiz, Mayra E. University of Puerto Rico - Department of Chemistry, Puerto Rico , Moore, Curtis E. University of California-San Diego - Department of Chemistry, USA , Rheingold, Arnold L. University of California-San Diego - Department of Chemistry, USA , Melendez, Enrique University of Puerto Rico - Department of Chemistry, Puerto Rico
Abstract :
Four new platinum(II) complexes, namely tetraethylammonium tribromido(2-methyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C8H7NS)] (1), tetraethylammonium tribromido(6-methoxy-2-methyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C9H9NOS)] (2), tetraethylammonium tribromido(2,5,6-trimethyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C10H11NS)] (3), and tetraethylammonium tribromido(2-methyl-5-nitro-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C8H6N2O2S)] (4), have been synthesized and structurally characterized by single-crystal X-ray diffraction techniques. These species are precursors of compounds with potential application in cancer chemotherapy. All four platinum(II) complexes adopt the expected square-planar coordination geometry, and the benzothiazole ligand is engaged in bonding to the metal atom through the imine N atom (Pt—N). The Pt—N bond lengths are normal: 2.035 (5), 2.025 (4), 2.027 (5) and 2.041 (4) Å for complexes 1, 2, 3 and 4, respectively. The benzothiazole ligands are positioned out of the square plane, with dihedral angles ranging from 76.4 (4) to 88.1 (4)°. The NEt4 cation in 3 is disordered with 0.57/0.43 occupancies.
Keywords :
anticancer , benzothiazole , crystal structure , platinum(II) , cisplatin
Journal title :
Acta Crystallographica Section E: Crystallographic Communications
