Please use this identifier to cite or link to this item: https://doi.org/10.1039/d1dt01984h
Title: A dynamic tetranuclear gold(i)-cyclophane - gold(i)-centred chirality and fluxionality arising from an intramolecular shift of Au-S bonds
Authors: Ang, Pau Lin 
Nguyen, Van Ha 
Yip, John HK 
Keywords: Science & Technology
Physical Sciences
Chemistry, Inorganic & Nuclear
Chemistry
OPEN-RING COMPLEXES
CRYSTAL-STRUCTURES
GOLD(I) COMPLEXES
BRIDGING LIGANDS
DINUCLEAR
PENICILLAMINATE
AURIOPHILICITY
AUROPHILICITY
ARCHITECTURES
ASSEMBLIES
Issue Date: 16-Jul-2021
Publisher: ROYAL SOC CHEMISTRY
Citation: Ang, Pau Lin, Nguyen, Van Ha, Yip, John HK (2021-07-16). A dynamic tetranuclear gold(i)-cyclophane - gold(i)-centred chirality and fluxionality arising from an intramolecular shift of Au-S bonds. DALTON TRANSACTIONS 50 (33) : 11422-11428. ScholarBank@NUS Repository. https://doi.org/10.1039/d1dt01984h
Abstract: A tetranuclear gold(i) complex [Au4(μ-PAnP)2(μ-L)2] (PAnP = 9,10-bis(diphenylphosphino)anthracene and L = benzene-1,2-dithiolate) has been synthesized and characterised by multinuclear NMR and X-ray crystallography. The molecule has a cyclophane-like structure which can be considered to be composed of two [Au2(μ-PAnP)(μ-L)] units held together by Au-S bonds and aurophilic interactions (Au-Au = 3.0712(2) Å). L acts as a chelating and bridging ligand with one of its S atoms bonded to two Au ions as sulfonium ions and there are two Au2S2 cores on each side of the cyclophane. A sulfur atom in each Au2S2 core is a chiral sulfonium ion, being bonded to two chemically distinct Au ions. Two Au ions are bonded to four atoms (2S, P and Au) in an asymmetric environment, making them a rare example of gold(i)-centred chirality. The two Au2S2 cores have RAu, RS and SAu, SS configurations, and the chiralities of the sulfonium ion and the gold ion are correlated. Variable-temperature NMR spectroscopy showed that the metallacyclophane undergoes rapid exchange in solution. A bond shift mechanism involving simultaneous cleavage and formation of Au-S bonds is proposed for the exchange.
Source Title: DALTON TRANSACTIONS
URI: https://scholarbank.nus.edu.sg/handle/10635/228961
ISSN: 14779226
14779234
DOI: 10.1039/d1dt01984h
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