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PNacPNacE: (E = Ga, In, Tl) - monomeric group 13 metal(I) heterocycles stabilized by a sterically demanding bis(iminophosphoranyl)methanide

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Date
28/12/2017
Author
Sindlinger, Christian
Lawrence, Samuel
Acharya, Shravan
Ohlin, C. Andre
Stasch, Andreas
Keywords
QD Chemistry
DAS
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Abstract
The salt metathesis reaction of the sterically demanding bis(iminophosphoranyl)methanide alkali metal complexes LM (L- = HC(Ph2P=NDip)2-, Dip = 2,6-iPr2C6H3; M = Li, Na, K) with "GaI", InBr or TlBr afforded the monomeric group 13 metal(I) complexes LE:, E = Ga (1), In (2) and Tl (3) in moderate yields, and small quantities of LGaI2 4 in the case of Ga, respectively. The molecular structures of LE: 1-3 from X-ray single crystal diffraction show them to contain puckered six-membered rings with N,N'-chelating methanide ligands and two-coordinated metal(I) centres. Reduction reactions of LAlI2 5, prepared by iodination of LAlMe2, were not successful and no aluminium(I) congener could be prepared so far. DFT studies on LE:, E = Al–Tl, were carried out and support the formulation as an anionic, N,N'-chelating methanide ligand coordinating to group 13 metal(I) cations. The HOMOs of the molecules for E = Al-In show a dominant contribution from a metal-based lone pair that is high in s-character.
Citation
Sindlinger , C , Lawrence , S , Acharya , S , Ohlin , C A & Stasch , A 2017 , ' PNacPNacE: (E = Ga, In, Tl) - monomeric group 13 metal(I) heterocycles stabilized by a sterically demanding bis(iminophosphoranyl)methanide ' , Dalton Transactions , vol. 46 , no. 48 , pp. 16872-16877 . https://doi.org/10.1039/C7DT04048B
Publication
Dalton Transactions
Status
Peer reviewed
DOI
https://doi.org/10.1039/C7DT04048B
ISSN
1477-9226
Type
Journal article
Rights
© 2017 the Authors. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/ 10.1039/C7DT04048B
Description
A.S. and C.A.O. are grateful to the Australian Research Council for support. A.S. thanks the University of St Andrews. CAO is grateful for a grant from the Kempe foundation (JCK-1719).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/16530

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