Toggle Main Menu Toggle Search

Open Access padlockePrints

An Acyclic Arsenium Cation Stabilised by a Single P‐As π‐Interaction and a Cyclic Diphosphinophosphonium Salt

Lookup NU author(s): Dr Keith Izod, Dr Peter Evans, Dr Paul Waddell



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Wiley, 2019.

For re-use rights please refer to the publisher's terms and conditions.


Stable acyclic arsenium cations R2As+, isoelectronic analogues of germylenes, are rare in comparison to the corresponding phosphenium cations. The first example of a diphosphaarsenium salt [{(Dipp)2P}2As][Al{OC(CF3)3}4].1½PhMe (2) is described. This salt exhibits remarkable stability due to delocalisation of a lone pair from a planar phosphorus centre into the vacant p-orbital at arsenic; the bonding in 2 has been probed using DFT calculations. An attempt to synthesise an analogous diphosphaphosphenium salt unexpectedly generated the cyclic phosphonium salt [cyclo-{(Mes)P}2P(Mes)2][BArF4].CyMe (5.CyMe), via cyclisation of a putative phosphine-substituted diphosphene cation intermediate.

Publication metadata

Author(s): Izod k, Evans P, Waddell PG

Publication type: Article

Publication status: Published

Journal: Angewandte Chemie International Edition

Year: 2019

Volume: 58

Issue: 32

Pages: 11007-11012

Print publication date: 05/08/2019

Online publication date: 03/06/2019

Acceptance date: 03/06/2019

Date deposited: 11/06/2019

ISSN (print): 1433-7851

ISSN (electronic): 1521-3773

Publisher: Wiley


DOI: 10.1002/anie.201905922


Altmetrics provided by Altmetric