Structural studies of Rh4(CO)12 derivatives in solution and in the solid state |
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| Authors: | Brian T Heaton Luciano Longhetti D Michael P Mingos Clive E Briant Peter C Minshall Brian RC Theobald Luigi Garlaschelli Ugo Sartorelli |
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| Institution: | Chemical Laboratory, University of Kent, Canterbury CT2 7NH Great Britain;Inorganic Chemistry and Chemical Crystallography Laboratory, South Parks Road, Oxford OX1 3QR Great Britain;Istituto di Chimica Generale ed Inorganica, Universität di Milano, Via G. Venezian 21, 20133, Milan Italy |
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| Abstract: | The crystal structures of Rh4(CO)10(PPh3)2 and Rh4(CO)9P(OPh)33 are reported. 31P-1H NMR studies on Rh4(CO)12-x {P(OPh)3}x(X 1, 2 and 3) show that each derivative exists as only one isomer in solution whereas the analogous triphenylphosphine derivatives can exist as different isomers. A quantitative redistribution of triphenylphosphites occurs on mixing Rh4-(CO)12-xLx with Rh4(CO)12-yLy (L P(OPh)3; x 0, 1, 2, y x + 2; x 0, y x + 4) to give Rh4(CO)12-zLzz (x + y)]; a related rapid intermolecular randomisation of carbonyls occurs on mixing Rh4(12CO)12 with Rh4(13CO)12. |
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