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- W2048834269 abstract "Abstract The stereoelectronic features of the pentacyclic phosphane (1 S ,4 R ,4a S ,5a R ,6 R ,9 S ,9a S ,10a R )‐4,6,11,11,12,12‐hexamethyl‐10‐phenyldodecahydro‐1,4:6,9‐dimethanophenoxaphosphinine (phenop) have been explored through a range of empirical methods including single‐crystal X‐ray structure determinations of the sulfide derivative phenopS ( 1 ), the selenide phenopSe ( 2 ), [Fe(CO) 4 (κ 1 ‐phenop)] ( 3 ), [W(CO) 5 (κ 1 ‐phenop)] ( 4 ) and trans ‐[Rh(κ 1 ‐phenop)(CO)Cl] ( 5 ). Cone angles derived from the structural data range from 164–203° with the smaller values being observed for the compounds possessing a phenyl group that is orthogonal to the P–Z bond and the larger values for the compounds expressing a parallel phenyl ring orientation. The cone angle data suggest a moderately bulky phosphane comparable, in steric terms, to PCy 3 . This is further borne out on inspection of the M–P bond lengths which tend towards the longer end of the known scale. Some flexibility is observed in the central ring which approximates to a boat conformation at one extreme and an envelope at the other depending on the nature of the P‐substituent. The electronic properties of κ 1 ‐phenop have been assessed using a combination of infrared and NMR spectroscopy. The absolute value of the one‐bond coupling constants 1 J P‐Se and 1 J P‐Rh are very close to those reported for PPh 3 , suggesting a close analogy between κ 1 ‐phenop and the well known triphenylphosphane. In addition, relevant υ(CO) stretches in the IR spectra of the metal carbonyl complexes also closely mimic those for the analogous complexes containing PPh 3 . These conclusions are supported by molecular electrostatic potential calculations at the DFT level which place phenop close to PPh 3 in terms of lone pair availability." @default.
- W2048834269 created "2016-06-24" @default.
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- W2048834269 date "2011-01-28" @default.
- W2048834269 modified "2023-09-27" @default.
- W2048834269 title "Metal Complexes of a Structurally Embellished Phosphinane Ligand: An Assessment of Stereoelectronic Effects" @default.
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- W2048834269 doi "https://doi.org/10.1002/ejic.201001170" @default.
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