The dianion [OsRh4(CO)15]2− has been obtained by reduction of a mixture of Rh4(CO)12 and Os3(CO)12. Variable temperature 13C NMR spectra in solution indicate that the mixed metal cluster is isostructural with [FeRh4(CO)15]2− and [RuRh4(CO)15]2−, with the Os atom located in an apical position within the trigonal bipyramidal metal skeleton. The overall ideal symmetry is Cs, with nine carbonyls terminally bound (three each on the apical metals and one each on the equatorial metals) and six bridging (the three Rheq−Rheq edges and two Os−Rheq and one Rhap−Rheq edges).
Fumagalli, A., Garlaschelli, L., DELLA PERGOLA, R. (1989). Synthesis and solution structure of the carbonyl cluster dianion [osrh4(co)9(mu-2-co)6]2-. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 362(1-2), 197-203 [10.1016/0022-328X(89)85294-5].
Synthesis and solution structure of the carbonyl cluster dianion [osrh4(co)9(mu-2-co)6]2-
DELLA PERGOLA, ROBERTO
1989
Abstract
The dianion [OsRh4(CO)15]2− has been obtained by reduction of a mixture of Rh4(CO)12 and Os3(CO)12. Variable temperature 13C NMR spectra in solution indicate that the mixed metal cluster is isostructural with [FeRh4(CO)15]2− and [RuRh4(CO)15]2−, with the Os atom located in an apical position within the trigonal bipyramidal metal skeleton. The overall ideal symmetry is Cs, with nine carbonyls terminally bound (three each on the apical metals and one each on the equatorial metals) and six bridging (the three Rheq−Rheq edges and two Os−Rheq and one Rhap−Rheq edges).
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