Rhodium(I ) complexes containing the enolate of N-acetyl-3-butanoyltetramic acid (Habta) and the crystal structure of [Rh(abta){P(OPh)3}2]
| Autor: | Olga Markopoulou, Chacko Jacob, Chris-Kriton Skylaris, Brian T. Heaton, John Markopoulos, Anthony K. Smith, Jens Nähring |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | J. Chem. Soc., Dalton Trans.. :1701-1706 |
| ISSN: | 1364-5447 0300-9246 |
| Popis: | Reaction of N-acetyl-3-butanoyltetramic acid (Habta)(N-acetyl-3-butanoyl-1,5-dihydro-4-hydroxy-2H-pyrrol-2-one) with [Rh(acac)(CO)2](acac = acetylacetonate) in a 1 : 1 ratio gave [Rh(abta)(CO)2]1 which underwent displacement of CO by either P(OPh)3 or PPh3 to give [Rh(abta)(CO)L][L = P(OPh)3 or 2 PPh34] and [Rh(abta){P(OPh)3}2]3; the reaction of 4 with PPh3 gave the five-co-ordinate complex [Rh(abta)(CO)(PPh3)2]5. The solid-state structure of 3 has been determined by X-ray diffraction. It shows that rhodium adopts a slightly distorted square-planar geometry with the abta enolate ligand adopting an O,O′ mode of co-ordination via the functionalities associated with C4 and the acyl group at C3 in the pyrrolidine ring. Under 13CO, 3 is in equilibrium with 2 and 1 as shown by 13C NMR spectroscopy. No evidence has been found for the formation of five-co-ordinate complexes through the addition of P(OPh)3 to 2. |
| Databáze: | OpenAIRE |
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