Dynamics and structure of some tricarbonylferrole-iron tricarbonyl derivatives |
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Authors: | L.J. Todd J.P. Hickey J.R. Wilkinson J.C. Huffman K. Folting |
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Affiliation: | Institute for Organic Chemistry TNO, Utrecht The Netherlands |
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Abstract: | A series of compounds of the formula Fe2(CO)6-x(PR3)x(R′C2R″)2 (x = 0, R′ and R″ = Ph, R′ and R″ = H, R′ = Ph and R″ = H; x = 1, K = Ph or n-Bu, and R′ and R″ = Ph) were studied by 13C NMR to observe their solution properties. The tricarbonylferrole unit was found to be static from ?125 to +95° C, while the π-Fe(CO)3 group appeared to be fluxional over the same temperature range. Definite assignments of the carbonyl carbon and ferrole ring carbon resonances have been made. A low temperature single crystal X-ray study of Fe2(CO)5PPh3(PhC2Ph)2 demonstrated that the phosphine ligand was attached to the ferrole iron contrary to previous belief based on chemical evidence. |
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Keywords: | To whom correspondence should be addressed. |
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