Synthesis and Molecular Structure of Zwitterionic Complexes of Phenothiazine-5-oxide Derivatives Coordinated with Cobalt(II) and Copper(II) Ions

Abstract

The synthesis and characterization of Co(II)CI₂ and Cu(II)Cl₂ complexes with 2-chloro-10-(3-dimethylaminopropyl)phenothiazine-5-oxide hydrochloride (cpz(O)HCl) and three related compounds are described. The crystal structures of the complexes [CoCl₃cpz(O)H] (1) and [CuCl₃ cpz(O)H] (2) were determined by single-crystal X-ray diffraction analyses. 1 crystallizes in the monoclinic space group P2₁/c with a=8.150(1), b=17.763(2), c=14.630(2) Å, β=103.93(1)°, V=2055.8(3) ų, and Z=4. 2 crystallizes in the monoclinic space group P2₁/c with a=8.141(1), b=17.175(4), c=14.810(3) Å, β=103.27(1)°, V=2015.5(7) ų, and Z=4. The metal atoms in both complexes are coordinated in a tetrahedral geometry and the two complexes are arranged in a head-to-tail manner to form a dimer.