The stereochemical and kinetic consequences of binding a pentaphenylcyclopentadienyl ligand. Crystal structure of Ru(C5Ph5)(CO)(PPh3)Br
作者： Harry Adams , Neil A. Bailey , Andrew F. Browning , Jim A. Ramsden , Colin White
DOI: 10.1016/0022-328X(90)87179-H
关键词: Stereochemistry 、 Crystal structure 、 Atom 、 Ruthenium 、 Diastereomer 、 Crystallography 、 X-ray crystallography 、 Molecule 、 Triphenylphosphine 、 Chemistry 、 Ligand
摘要: Abstract The reaction of Ru3(CO)12 with C5Ph5Br yields Ru(η5-C5Ph5)(CO)2Br (1), which reacts phosphorus donor ligands to give Ru(η5-C5Ph5)(CO)LBr (2: L = PPh3; 3: P(OMe)3; 4: P(OPh)3). A limited kinetic study has revealed that these carbonyl replacement reactions occur via a dissociative mechanism at rate significantly faster than those for Ru(Cp′)(CO)2Br (Cp′ C5H5 or C5Me4Et). crystal structure 2 is reported, and reveals the triphenylphosphine ligand extends into region occupied by pentaphenyl propeller, forcing this propeller an unsymmetrical chiral array. This array complexed ruthenium atom gives rise diastereoisomers can be seen in 13C 31P NMR spectra 2.
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