GENERATION OF A BRIDGING ETHENYL LIGAND AT A DIIRON CENTER VIA CARBON PHOSPHORUS BOND-CLEAVAGE.
J ORGANOMET CHEM
91 - 95.
UV irradiation of [Fe2(CO)6(mu-CO)(mu-dppm)] (1) with diphenylvinylphosphine yields [Fe2(CO)5(mu-Ph2PCH = CH2)(mu-dppm)] (2) in which the vinylphosphine acts as a bridging four electron donor ligand to the di-iron centre. Thermolysis of 2 results in carbon-phosphorus bond cleavage giving the mu-alkenyl complex [Fe2(CO)4(mu-CH = CH2)(mu-PPh2)(mu-dppm)] (3). The mu-ethenyl moiety in 3 is static at room temperature but at higher temperatures "windshield wiper" fluxionality is observed, a process conveniently monitored by P-31 NMR spectroscopy.
|Title:||GENERATION OF A BRIDGING ETHENYL LIGAND AT A DIIRON CENTER VIA CARBON PHOSPHORUS BOND-CLEAVAGE|
|Keywords:||CRYSTAL-STRUCTURES, COMPLEXES, CENTERS, ALKYNES|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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