Source of materialReagents and solvents used were of commercially available quality. 5-Bromosalicylaldehyde (201.3 mg, 1.0 mmol), cyclopropylamine (57.2 mg, 1.0 mmol) and Co(CH 3 COO) 2 · 6H 2 O (142.6 mg, 0.5 mmol) were stirred and refluxed in ethanol at about 351 K for 30 min to give a red solution. Red block-shaped crystals, suitable for X-ray structural determination were formed by slow evaporation of the solution in dark for about a week. Elemental analysis found: C, 44.89 %; H, 3.45 %; N, 5.13 %; calc. for C20H18Br2CoN2O2: C, 44.72 %; H, 3.38 %; N, 5.22 %.
Experimental detailsThe large ADP anisotropy for the C9 and C10 atoms is due to the disorder of the C8/C9/C10 cyclopropane ring.
DiscussionCobalt complexes of Schiff bases have been extensively studied. They play an important role in both synthetic and structural research [1][2][3]. Recent research show that certain cobalt complexes are potent antiviral reagents [4]. Herein we report the synthesis and crystal structure of a cobalt(II) complex derived from the Schiff base 4-bromo-2-(cyclopropyliminomethyl)phenol. The Co II atom in the title complex is four-coordinated by two O and two N atoms from two Schiff base ligands, forming a tetrahedral coordination. All the bond lengths and angles subtended at the Co center are comparable to the corresponding values observed in other Schiff base cobalt complexes [5][6][7].
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