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Issue 19, 2018
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Exploiting coordination geometry to selectively predict the σ-donor and π-acceptor abilities of ligands: a back-and-forth journey between electronic properties and spectroscopy

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Abstract

Through an analysis of eighty tetrahedral and square-planar metal carbonyls of general formula [M(CO)(L′)(L)2] including newly synthesized chlorocarbonyl rhodium complexes with chelating atropoisomeric diphosphanes, we show how coordination geometry can switch the carbonyl stretching frequency into a selective probe of the σ-donor and π-acceptor abilities of the ligands. We thus provide a framework whereby the σ-donation and π-backdonation constituents of the Dewar–Chatt–Duncanson model can be quantitatively predicted through spectroscopic data on coordinated CO moieties and vice versa.

Graphical abstract: Exploiting coordination geometry to selectively predict the σ-donor and π-acceptor abilities of ligands: a back-and-forth journey between electronic properties and spectroscopy

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Article information


Submitted
16 Dec 2017
Accepted
07 Feb 2018
First published
13 Feb 2018

This article is Open Access

Chem. Commun., 2018,54, 2397-2400
Article type
Communication

Exploiting coordination geometry to selectively predict the σ-donor and π-acceptor abilities of ligands: a back-and-forth journey between electronic properties and spectroscopy

M. Fusè, I. Rimoldi, G. Facchetti, S. Rampino and V. Barone, Chem. Commun., 2018, 54, 2397
DOI: 10.1039/C7CC09627E

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