ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Mononuclear cobalt(III) complexes with N-salicylidene-2-hydroxy-5-bromobenzylamine and N-salicylidene-2-hydroxy-5-chlorobenzylamine

Masahiro Mikuriya, Naoyuki Masuda, Yoshihisa Kakuta, Shinya Minato, Takaya Inui, and Daisuke Yoshioka

Department of Applied Chemistry for Environment and Research Center for Coordination Molecule-based Devices, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan

E-mail: junpei@kwansei.ac.jp

Abstract: Cobalt(III) complexes with N-salicylidene-2-hydroxy-5-bromobenzylamine (H₂sbba) and N-salicylidene-2-hydroxy-5-chlorobenzylamine (H₂scba), [n-(C₄H₉)₄N][Co(sbba)₂] (I) and [n-(C₄H₉)₄N][Co(scba)2] (II ), were synthesized. The crystal structure of II was determined by the single-crystal X-ray diffraction method at 90 K confirming its crystallization in the monoclinic space group P2₁/n with a = 11.729(2) Å, b = 16.901(3) Å, c = 21.483(4) Å, β = 98.840(4)◦, V = 4208.2(14) ų, D_x = 1.295 g cm⁻³, and Z = 4. The R1 [I > 2σ(I)] and ωR2 (all data) values of 0.0664 and 0.1920, respectively, for all 9521 independent reflections. The compound is composed of a tetra(n-butyl)ammonium cation and an octahedral cobalt(III) complex anion with two scba²⁻ ligands in a meridional fashion. The electronic spectral features of I and II are consistent with the octahedral cobalt(III) ion with an N₂O₄ donor set.

Keywords: cobalt(III) complex – Schiff-base ligand – crystal structure – electronic spectra

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0164

Chemical Papers 70 (1) 126–130 (2016)