title: Donor-substituted phosphanes - surprisingly weak Lewis donors for phosphenium cation stabilisation.
abstract: Paradoxically, N- and O-donor substituted tri-arylphosphanes are shown to be weaker donors than PPh3when binding the soft Lewis acid moiety [PPh2]+. This arises from internal solvation and rehybridisation at phosphorus, precluding chelation and increasing steric demand, in direct contrast to coordination modes observed for metal complexes.
authors.affiliation: School of Physical Sciences, University of Kent, Ingram Building, Canterbury, Kent CT2 7NH, UK. e.r.clark@kent.ac.uk.
authors.forename: Ewan R
authors.initials: ER
authors.lastname: Clark
authors.affiliation: School of Physical Sciences, University of Kent, Ingram Building, Canterbury, Kent CT2 7NH, UK. e.r.clark@kent.ac.uk.
authors.forename: Andryj M
authors.initials: AM
authors.lastname: Borys
authors.affiliation: School of Physical Sciences, University of Kent, Ingram Building, Canterbury, Kent CT2 7NH, UK. e.r.clark@kent.ac.uk.
authors.forename: Kyle
authors.initials: K
authors.lastname: Pearce