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Can the solid state structures of the dihalogen adducts R3EX2 (E = P, As; R = alkyl, aryl; X = Br, I) with the molecular spoke geometry be considered good mimics of the gold(I) systems [(R3E)AuX] (E = As, P; R = alkyl, aryl; X = Cl, Br, I)?

Barnes , N, Flower, KR, Fyyaz, SA, Godfrey, SM, Mcgown, A, Miles , PJ, Pritchard, RG and Warren, JE 2010, 'Can the solid state structures of the dihalogen adducts R3EX2 (E = P, As; R = alkyl, aryl; X = Br, I) with the molecular spoke geometry be considered good mimics of the gold(I) systems [(R3E)AuX] (E = As, P; R = alkyl, aryl; X = Cl, Br, I)?' , CrystEngComm, 12 (3) , pp. 784-794.

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Abstract

The solid-state structures of compounds of the type R3EX2 and [(R3E)AuX] (R = alkyl, aryl, E = As, P, X = Cl, Br, I) have been compared on the basis that they have similar molecular shape and volume with a view to determine whether this is a good approach to understand the formation of aurophilic interactions. To aid in the discussion the new compounds Ph2(C6H5–C6H4)P 1, Ph2(C6H5–C6H4)PI21a, [Ph2(C6H5–C6H4)PAuX] (X = Cl 2a, Br 2b, I 2c) and [(LAu)–C6H4–2–OMe] (L = PPh33a, PCy33b; PPh2-1-naphthyl 3c; PPh2–2–MeO–C6H43d) and [(LAu)–C6H3–2,5–(OMe)2] (L = PPh34a, PCy34b; PPh2-1-naphthyl 4c; PPh2–2–MeO–C6H44d, which have all been fully spectroscopically characterised and for 1a, 2a–c, 3a and 3c by X-ray crystallography, have been synthesised. It is found that in some cases the group 15 dihalogen adducts mimic the solid state structures of the gold halide complexes extremely well indicating the packing requirements of the ligand are dominant. In many other cases there are significant differences and these differences shed light on why it is difficult to predict with certainty the presence of an AuAu contact. It also appears that complexes with an Au–I bond are most likely to form an AuAu contact as the Au–I bond is the weakest hydrogen bond acceptor

Item Type: Article
Themes: Subjects / Themes > Q Science > QD Chemistry
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences
Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences > Biomedical Research Centre
Journal or Publication Title: CrystEngComm
Publisher: Royal Society of Chemistry
Refereed: Yes
ISSN: 1466-8033
Depositing User: AT McGown
Date Deposited: 16 Mar 2010 13:48
Last Modified: 24 Jul 2014 10:16
URI: http://usir.salford.ac.uk/id/eprint/3301

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