Inhaltszusammenfassung

The tetrahedral clusters Fe3(CO)10(mu3-PR) (1) react on thermal as well as photochemical activation with Ph2PC=CPh to give Fe3(CO)8(mu3-PR)[mu3-eta4-Ph2P-CC-Ph(CO)] (3). In 3 an edge-opened iron triangle bears a mu3-PR group on one side and the alkynylphosphane on the other side as bridging moieties. One of the terminal CO groups present in 1 in addition to being coordinated to the appropriate iron atom, is bonded to the phenylsubstituted carbon atom of the alkynylphosphane. Irradiation of th...The tetrahedral clusters Fe3(CO)10(mu3-PR) (1) react on thermal as well as photochemical activation with Ph2PC=CPh to give Fe3(CO)8(mu3-PR)[mu3-eta4-Ph2P-CC-Ph(CO)] (3). In 3 an edge-opened iron triangle bears a mu3-PR group on one side and the alkynylphosphane on the other side as bridging moieties. One of the terminal CO groups present in 1 in addition to being coordinated to the appropriate iron atom, is bonded to the phenylsubstituted carbon atom of the alkynylphosphane. Irradiation of the square-pyramidal cluster Fe3(CO)9(mu3-P(t)Bu)(mu3-Se) (2) in the presence of Ph2PC=CPh leads to the compounds Fe3(CO)7(Ph2PC=CPh)2(mu3-P(t)Bu)(mu3-Se) (4) and Fe3(CO)6(Ph2PC=CPh)3(mu3-P(t)Bu)(mu3-Se) (5). In these clusters the square-pyramidal framework of 2 is preserved. In each case the alkynylphosphane ligands are coordinated via phosphorus only. In 4 one of these ligands is bonded to each of the two equatorial iron centres; in 5 each of the three iron atoms bears an alkynylphosphane ligand. The results are supported by conventional spectroscopic and analytical data as well as by single-crystal analyses. » weiterlesen» einklappen

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