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Isolation and X‑ray Crystal Structures of Triarylphosphine Radical Cations

Abstract

Salts containing triarylphosphine radical cations <b>1</b><sup><b>•+</b></sup> and <b>2</b><sup><b>•+</b></sup> have been isolated and characterized by electron paramagnetic resonance (EPR) and UV–vis absorption spectroscopy as well as single-crystal X-ray diffraction. Radical <b>1</b><sup><b>•+</b></sup> exhibits a relaxed pyramidal geometry, while radical <b>2</b><sup><b>•+</b></sup> becomes fully planar. EPR studies and theoretical calculations showed that the introduction of bulky aryl groups leads to enhanced p character of the singly occupied molecular orbital, and the radicals become less pyramidalized or fully flattened

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The Francis Crick Institute

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Last time updated on 12/02/2018

This paper was published in The Francis Crick Institute.

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