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The chemistry of metal complexes with dicompartmental ligands has become a rapidly growing area of research, because of their importance in biomimetic studies of binuclear metalloproteins, their interesting catalytic properties, and their ability to stabilize unusual oxidation states and mixed-valance compounds.1 One type of cobalt complex of this ligand is presented in Fig. 1. The acyclic phenol-based ligand includes two different compartments: a six-coordinating N4O2 site and potentially a four-coordinating O4 site. The metal complexes prepared by such a ligand are precursors for preparation of macrocyclic complexes and also could potentially be used in solvatochromism studies2 and catalytic activities.3 The ligand was synthesized according to the procedure reported by us.4 The cobalt complex was prepared by allowing the title ligand to react with an equimolar amount of cobalt(II) acetate and twice the mole ratio of triethylamine in methanol. The cobalt(II) complex was precipitated almost immediately. A crystal suitable for X-ray structural determination was grown from acetonitrile. The solid high-spin Co(II) complex was indefinitely stable in air, but slowly oxidized in air when dissolved in CH3CN solution. A crystal having dimensions of 0.40 ¥ 0.30 ¥ 0.20 mm3 was chosen for X-ray diffraction studies. Measurements were made on a SMART-APEX 1 CCD diffractometer with graphite monochromatized Mo Ka radiation (l = 0.71073 Å) at 120 K. The structure was solved by direct methods using SHELXS2001, and refined by full-matrix least-squares techniques anisotropically for all non-H atoms.5 The positions of the H atoms were placed at geometrically idealized positions and X-ray Structure Analysis Online

Crystal and Molecular Structure of Co(II) Complex with N,N'-Bis(pyridine-2-ylmethyl)-N,N'-bis(5-bromo-3-formyl-2-hydroxybenzyl)-1,2-diamine Ligand