Abstract
In the title complex salt, [Au2{(C6H5)2PCH2P(C6H5)2}]Cl2·(CH3)2C=O·H2O, the dication forms an eight-membered {-PCPAu}2 ring with a transannular aurophilic inter-action [Au⋯Au = 2.9743 (2) Å]. The ring approximates a flattened boat conformation, with the two methyl-ene C atoms lying ca 0.58-0.59 Å above the least-squares plane defined by the Au2P4 atoms (r.m.s. deviation = 0.0849 Å). One Cl(-) anion functions as a weak bridge between the Au(I) atoms [Au⋯Cl = 2.9492 (13) and 2.9776 (12) Å]. The second Cl(-) anion forms two (water)O-H⋯Cl hydrogen bonds about a centre of inversion, forming a centrosymmetric eight-membered {⋯HOH⋯Cl}2 supra-molecular square. Globally, the dications and loosely associated Cl(-) anions assemble into layers lying parallel to the ac plane, being connected by C-H⋯Cl,π(phen-yl) inter-actions. The supra-molecular squares and solvent acetone mol-ecules are sandwiched in the inter-layer region, being connected to the layers on either side by C-H⋯Cl,O(acetone) inter-actions.
Highlights
The supramolecular squares and solvent acetone molecules are sandwiched in the inter-layer region, being connected to the layers on either side by C—H Cl,O(acetone) interactions
The Cl1 anion forms a singleC—H Cl contact, a reduced propensity reflecting its close association with the AuI atoms
The second Cl anion participates in hydrogen bonding as described below in
Summary
Recent studies have highlighted the significant biological activity exhibited by phosphanegold(I) carbonimidothioates, i.e. compounds of the general formula Ph3PAu[SC(OR). These compounds are cytotoxic and kill cancer cells by initiating apoptotic pathways (Yeo, Ooi et al., 2013; Ooi et al, 2015) and prove to be very potent to Grampositive bacteria (Yeo, Sim et al, 2013). Over and above this potential, phosphanegold(I) carbonimidothioates offer opportunities in crystal engineering (Kuan et al, 2008) and exhibit solid-state luminescence (Ho et al, 2006).
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