Article,

Synthesis, characterization, and crystal structure determination of two mercury(II) dimer complexes with 4,7-diphenyl-1,10-phenanthroline, 5,5'-dimethyl-2,2'-bipyridine and bromide

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JOURNAL OF COORDINATION CHEMISTRY, 63 (12): 2122-2131 (2010)
DOI: {10.1080/00958972.2010.496128}

Abstract

Mercury(II) complexes, \Hg(Ph2phen)(-Br)2Br2\ center dot CH3CN (1) and \Hg(dmbpy)(mu-Br)2Br2\(2) (where Ph2phen is 4,7-diphenyl-1,10-phenanthroline and dmbpy is 5,5'-dimethyl-2,2'-bipyridine), were synthesized from reaction of HgBr2 with Ph2phen and dmbpy in CH3CN and CH3OH. Both complexes were thoroughly characterized by elemental analysis, infrared, 1H and 13C NMR spectroscopy and single-crystal X-ray diffraction. Complexes 1 and 2 crystallize in the space group P21/n of the monoclinic and P1 of the triclinic systems and contain four and one molecules per unit cell, respectively. The unit cell dimensions for 1 are: a = 20.422(4) angstrom, b = 11.384(2) angstrom, c = 20.665(4) angstrom, and = 109.94(3)degrees and for 2 are: a = 8.7470(17) angstrom, b = 8.8328(18) angstrom, c = 9.4950(19) angstrom and = 75.47(3)degrees, = 82.21(3)degrees, = 85.56(3)degrees. According to X-ray structure determination both complexes are five coordinate with three bromides and one bidentate ligand; one bromide is set at a semi-bridging position.

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