A neutral four-coordinate mononuclear cobalt(II) complex with biphenyl appended n-bidendate ligand: Synthesis, structure and spectral properties

A mononuclear cobalt(II) complex [Co(BP)(Cl2)], 1 with a new N,N-bidentate ligand, BP ([N,N-(1,1′-biphenyl-2,2′-dimethylene)]-2- aminomethyl) pyridine) was synthesized and characterized by elemental analysis, UV-Vis, paramagnetic NMR, magnetic moment and single crystal XRD. The air and moisture stable Co(II) title complex is a 15 electron species which crystallizes in the monoclinic space group P21/n with cell dimensions a = 10.406(3), b = 12.873(4), c = 13.859(7) Å, β = 96.30(3)Ëš and Z = 4. The cobalt atom has distorted tetrahedral (td) geometry with coordination provided by an amine and pyridyl nitrogen donors of BP and two terminal chloride ions. The packing is stabilized through C- H•••π and van der Waals interactions. Index Abstract: A neutral four coordinate cobalt(II) complex with a new N,N-bidentate ligand capped by a biphenyl appendage was characterized by spectroscopic and single crystal X-ray diffraction technique. The title complex is a 15 e- molecule whose crystal structure is the first report of a neutral tetrahedral Co(II) complex with biphenyl appended bidentate ligand with amino-methyl pyridine.[Figure not available: see fulltext.] © 2010 Springer Science+Business Media, LLC.