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Activation of tri(2-furyl)phosphine at a dirhenium centre: Formation of phosphido-bridged dirhenium complexes |
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| Authors: | Shishir Ghosh Daniel T Haworth Tasneem A Siddiquee Graeme Hogarth |
| Institution: | a Department of Chemistry, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh b Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, USA c Department of Chemistry, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53211-3029, USA d Department of Chemistry, University College London, 20 Gordon Street, London WC1H OAJ, UK e Inorganic Chemistry Research Group, Chemical Physics, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden |
| Abstract: | Reaction of tri(2-furyl)phosphine (PFu3) with Re2(CO)10−n(NCMe)n] (n = 1, 2) at 40 °C gave the substituted complexes Re2(CO)10−n(PFu3)n] (1 and 2), the phosphines occupying axial position in all cases. Heating Re2(CO)10] and PFu3 in refluxing xylene also gives 1 and 2 together with four phosphido-bridged complexes; Re2(CO)8−n(PFu3)n(μ-PFu2)(μ-H)] (n = 0, 1, 2) (3-5) and Re2(CO)6(PFu3)2(μ-PFu2)(μ-Cl)] (6) resulting from phosphorus-carbon bond cleavage. A series of separate thermolysis experiments has allowed a detailed reaction pathway to be unambiguously established. A similar reaction between Re2(CO)10] and PFu3 in refluxing chlorobenzene furnishes four complexes which include 1, 2, 6 and the new binuclear complex Re2(CO)6(η1-C4H3O)2(μ-PFu2)2] (7). All new complexes have been characterized by a combination of spectroscopic data and single crystal X-ray diffraction studies. |
| Keywords: | Rhenium Carbonyl Tri(2-furyl)phosphine C-P bond cleavage X-ray structures |
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