Synthesis and characterization of diimine–diselenolene complexes of nickel and platinum: examining the influence of the chalcogenide atom
作者:Sergey M. Dibrov、Robert E. Bachman
DOI:10.1016/j.ica.2003.09.004
日期:2004.3
[(bpy)Pt(bds)], 1, (bpy-2,2'-bipyridine,bds-1,2-benenediselenolene) was prepared in good yield by the reaction of [(bpy)PtCl2] with bdsNa(2), which was generated in situ by reduction of oligomeric [bds](n). The analogous nickel complex [(bpy)Ni(bds)] (2), was generated in a similar fashion but could not be isolated cleanly. UV-Vis and electrochemical examination of these complexes show that the substitution of selenium atoms for sulfur atoms found in the related dithiolene complexes [(bpy)Pt(bdt)] (3), and [(bpy)Ni(bdt)] (4) (bdt= 1,2-benzenedithiolene) results in a small, but significant, alteration of the optical and electronic properties of this class of complexes. 1 was structurally characterized as both its CH2Cl2 solvate (P2(1)/n - a=8.5298(10) Angstrom, b=11.3461(2), c=19.1864(2), beta=99.309(10)degrees, V=1832.40(4) Angstrom(3), Z=4) and its DMSO solvate (P2(1)/c-a=11.1725(10) Angstrom, b=20.7304(10) Angstrom, c=8.3882(10) Angstrom, beta=99.926(10), V=1913.71(3) Angstrom(3), Z=4). With the exception of the incorporation of lattice solvent, both structures of 1 are essentially identical to that observed for 3 and 4 at both the molecular and supramolecular level. (C) 2003 Elsevier B.V. All rights reserved.