| Автор | Goldberg, Justin E. |
| Автор | Howard, Judith A. K. |
| Автор | Müller, Harald |
| Автор | Pilotti, Massimino U. |
| Автор | Stone, F. Gordon A. |
| Дата выпуска | 1990 |
| dc.description | The reaction between [NEt4][Rh(CO)(PPh3)(η<sup>5</sup>-C2B9H11)] and [PtCl(H)(PEt3)2] in acetone, in the presence of TIBF4, affords the dimetal compound [RhPt(µ-H)(µ-CO)(PEt3)2(PPh3)(η<sup>5</sup>-C2B9H11)]. The structure of this complex has been established by an X-ray diffraction study. The Rhâ Pt bond [2.734(2)à ] is bridged by a hydrido ligand [Rhâ H 1.7(2), Ptâ H 1.8(2)à ] and by a carbonyl group [Rhâ CO 1.99(1), Ptâ CO 1.99(1)à ; Rhâ Câ O 133(1), Ptâ Câ O 141(1)°]. The platinum atom carries the two PEt3 ligands [Ptâ P 2.275(4) and 2.335(4)à ], while the rhodium atom is co-ordinated by the PPh3 molecule [Rhâ P 2.257(4)à ] and the five atoms [graphic omitted] in the pentagonal face of the nido-C2B9H11 cage. Treatment of this dimetal compound with the alkynes RC.tbd;CR (R = Ph or C6H4Me-4) in tetrahydrofuran at room temperature affords the complexes [RhPt{Ï -C(R).dbd6;C(R)H}(CO)(PEt3)(PPh3)(η<sup>5</sup>-C2B9H11)]. An X-ray diffraction study on the species with R = C6H4Me-4 revealed the following structural features. The Rhâ Pt bond [2.762(1)à ] is bridged by the C2B9H11 cage such that the latter is η<sup>5</sup> co-ordinated to the rhodium atom while forming an exopolyhedral bond to the platinum via a three-centre Bâ H â Pt linkage. The boron atom involved lies in the pentagonal face of the cage ligating the rhodium, and is in the β site with respect to the two carbon atoms. The rhodium atom is co-ordinated by a PPh3[Rhâ P 2.294(2)à ] and a CO [Rhâ CO 1.845(8)à ] group. The platinum atom carries the PEt3 ligand [Ptâ P 2.221(2)à ] and a Ï bonded cis-C(C6H4Me-4).dbd6;C(C6H4Me-4)H vinyl group [Ptâ C 2.036(7)à ]. N.m.r. data (<sup>1</sup>H,<sup>13</sup>C-{<sup>1</sup>H},<sup>31</sup>P-{<sup>1</sup>H}, and <sup>11</sup>B-{<sup>1</sup>H}) for the compounds are reported and discussed. |
| Формат | application.pdf |
| Издатель | Royal Society of Chemistry |
| Название | Synthesis and crystal structures of the complexes [RhPt(µ-H)(µ-CO)(PEt3)2(PPh3)(η5-C2B9H11)] and [RhPt{σ-C(C6H4Me-4)C(C6H4Me-4)H}(CO)(PEt3)(PPh3)(η5-C2B9H11)] |
| Тип | research-article |
| DOI | 10.1039/DT9900003055 |
| Electronic ISSN | 1364-5447 |
| Print ISSN | 1472-7773 |
| Журнал | Journal of the Chemical Society, Dalton Transactions |
| Первая страница | 3055 |
| Последняя страница | 3061 |
| Выпуск | 10 |
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