Issue 18, 2001
From the journal:

Journal of the Chemical Society, Dalton Transactions

A time-resolved infrared spectroscopic study of [M(SnR3)2(CO)2(α-diimine)] (M = Ru, Os; R = Ph, Me): evidence of charge redistribution in the lowest-excited state

Julia A. Weinstein,ac   Joris van Slageren,b   Derk J. Stufkens,*b   Stanislav Zálišd  and  Michael W. George*a  

* Corresponding authors

a School of Chemistry, University of Nottingham, University Park, Nottingham, UK

b Institute of Molecular Chemistry, Universiteit van Amsterdam, Nieuwe Achtergracht 166, The Netherlands

c Department of Chemistry, Moscow State University, Russia

d J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3, Czech Republic

Abstract

According to previous electronic absorption, resonance Raman and DFT studies the lowest-energy electronic transition of the RuII and OsII complexes trans,cis-[M(SnR3)2(CO)2(α-diimine)] (α-diimine = bpy, etc.) has a σ(Sn–M–Sn) → π*(α-diimine) or sigma-bond-to-ligand charge-transfer (SBLCT) character. Nanosecond time-resolved step-scan IR (s2-TRIR) spectra of a series of these complexes are reported which indicate that the initial SBLCT excitation is followed by a redistribution of the electron density if this transition has an appreciable charge transfer character. This effect is virtually the same for the Ru and Os compounds, but different for the SnMe3 and SnPh3 complexes. s2-TRIR spectra of [Os(SnPh3)2(CO)2(dmb)] showed the occurrence of an infrared rigidochromic effect in a low-temperature glass.

Graphical abstract: A time-resolved infrared spectroscopic study of [M(SnR3)2(CO)2(α-diimine)] (M = Ru, Os; R = Ph, Me): evidence of charge redistribution in the lowest-excited state

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Article information

DOI
https://doi.org/10.1039/B102450G
Article type
Paper
Submitted
15 Mar 2001
Accepted
09 Jul 2001
First published
22 Aug 2001

J. Chem. Soc., Dalton Trans., 2001, 2587-2592

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A time-resolved infrared spectroscopic study of [M(SnR3)2(CO)2(α-diimine)] (M = Ru, Os; R = Ph, Me): evidence of charge redistribution in the lowest-excited state

J. A. Weinstein, J. V. Slageren, D. J. Stufkens, S. Záliš and M. W. George, J. Chem. Soc., Dalton Trans., 2001, 2587 DOI: 10.1039/B102450G

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