Structural studies of phosphor-1,1-diselenoato Mn(I) and Re(I) complexes |
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| Authors: | Ching-Shiang Fang |
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| Institution: | Department of Chemistry, National Dong Hwa University, Hualien 97401, Taiwan |
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| Abstract: | Mononuclear complexes of the type, M(CO)4Se2P(OR)2] (M = Mn, R = iPr, 1a; Et, 1b; M = Re, R = iPr, 3a; Et, 3b) can be prepared from either -Se(Se)P(OiPr)2]2 (A) or Se{-Se(Se)P(OEt)2}2] (B) with M(CO)5Br. O,O′-dialkyl diselenophosphate ((RO)2PSe2]-, abbreviated as dsep) ligands generated from A and B act as a chelating ligand in these complexes. Upon refluxing in acetonitrile, these mononuclear complexes yield dinuclear complexes with a general formula of M2(CO)6{Se2P(OR)2}2] (M = Mn, R = iPr, 2a; Et, 2b; M = Re, R = iPr, 4a; Et, 4b). Dsep ligands display a triconnective, bimetallic bonding mode in the dinuclear compounds and this kind of connective pattern has never been identified in any phosphor-1,1-diselenoato metal complexes. Compounds 2b, 3b, and 4 are structurally characterized. Compounds 2b and 3b display weak, secondary Se?Se interactions in their lattices. |
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| Keywords: | Diselenophosphates Manganese Rhenium Crystallography 77Se NMR |
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