Apicophilicity of substituent groups and the structures of some trigonal bipyramidal trifluoromethylphosphoranes
作者:R. G. Cavell、D. D. Poulin、K. I. The、A. J. Tomlinson
DOI:10.1039/c39740000019
日期:——
spectroscopy is capable of distinguishing axial and equatorial substitution in trigonalbipyramidaltrifluoromethylphosphoranes allowing the establishment of a partial ‘apicophilicity’ series for somesubstituentgroups which appears to be based chiefly on inductive rather than mesomeric or electronegative parameters of the groups.
Methyltris(trifluromethyl)phosphoranes, Me(CF3)3PX. Tetra-alkylphosphoranes with fluro-, chloro-, and methoxy-substituents
作者:Kwat I. The、Ronald G. Cavell
DOI:10.1039/c39750000279
日期:——
N.m.r. spectroscopic studies of three new tetra-alkylphosphoranes, Me(CF3)3PX (X = F, Cl, OMe), confirm their true phosphoranes character and suggest that the ground state structures observable at low temperatures have a halogen and a CF3(X = F, Cl) or two CF3 groups (X = Me) in the axial positions of a trigonal bipyramidal framework.
Dimethyltris(trifluoromethyl)phosphorane, Me2P(CF3)3 and trimethylbis-(trifluoromethyl)phosphorane, Me3P(CF3)2; stable monofunctionally substituted penta-alkyl phosphoranes
作者:Kwat I. The、Ronald G. Cavell
DOI:10.1039/c39750000716
日期:——
The new, stable, penta-alkyl phosphoranes (CF3)3PMe2 and (CF3)2PMe3 are, according to n.m.r. spectral evidence, trigonal bipyramidal molecules, probably non-fluxional, in which CF3 groups are found to be preferentially located in the axial positions.