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Issue 30, 2006
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Gas-phase synthesis and reactivity of binuclear gold hydride cations, (R3PAu)2H+ (R = Me and Ph)

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Abstract

Electrospray ionization of a mixture of the two gold phosphine chlorides, R3PAuCl (R = Ph and Me), silver nitrate and the amino acid N,N-dimethylglycine (DMG) yields a range of gold containing cluster ions including: (R3P)Au(PR′3)+; (R3PAu)(R′3PAu)Cl+ and (R3PAu)(R′3PAu)(DMG-H)+ (where R = R′ = Ph; R = R′ = Me; R = Me and R′ = Ph). Collision induced dissociation (CID) of the (R3PAu)(R′3PAu)(DMG-H)+ precursor ions yielded the hitherto unknown gold hydride dimers (R3PAu)(R′3PAu)H+. The gas-phase chemistry of these dimers was studied using ion–molecule reactions, collision induced dissociation, electronic excitation dissociation (EED) and DFT calculations on the (H3PAu)2H+ model system. A novel phosphine ligand migration was found to occur prior to fragmentation under CID conditions and this was supported by DFT calculations, which revealed a transition state with a bridging phosphine ligand.

Graphical abstract: Gas-phase synthesis and reactivity of binuclear gold hydride cations, (R3PAu)2H+ (R = Me and Ph)

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Supplementary files

Article information


Submitted
27 Mar 2006
Accepted
10 May 2006
First published
02 Jun 2006

Dalton Trans., 2006, 3699-3707
Article type
Paper

Gas-phase synthesis and reactivity of binuclear gold hydride cations, (R3PAu)2H+ (R = Me and Ph)

G. N. Khairallah, R. A. J. O'Hair and M. I. Bruce, Dalton Trans., 2006, 3699
DOI: 10.1039/B604404B

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