Crystal structure of bis­μ-bis­(di­phenyl­phosphanyl)methane-κ2P:P′digold(I) dichloride acetone monosolvate monohydrate

摘要

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 inter­action [Au⋯Au = 2.9743 (2) Å]. The ring approximates a flattened boat conformation, with the two methyl­ene 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 supra­molecular 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(phen­yl) inter­actions. 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.