Hydrogen Bis[(8-quinolinol-N)(8-quinolinolato-N,O)(triphenylphosphine-P)silver(I)] Acetate Monohydrate

The asymmetric unit of the title compound, [Ag₂H(C₉H₆NO)₂(C₉H₇NO)₂(C₁₈H₁₅P)₂](C₂H₃O₂).H₂O, contains two exactly centrosymmetric [QHQ]⁺ complex cations, Q = [Ag(PPh₃)(C₉H₆NOH)(C₉H₆NO)]. The two electroneutral silver complex units, Q, in each cation are connected by a short hydrogen bond [O...O = 2.452 (5) and 2.463 (6) Å], with the proton lying at an inversion center. Each Ag atom has a distorted tetrahedral environment, bonding to two quinoline ligands and a PPh₃ ligand: both O and N atoms of the anionic quinolinol ligand are attached to the Ag atom, while in the neutral quinolinol ligand, the bonding is only through the N atom. The fourth coordination site is occupied by the P atom of a PPh₃ ligand. Some differences in the coordination of the two independent Ag atoms are observed. The [QHQ]⁺ complex cations are linked by the trapped acetate ions through hydrogen bonding which also connects the water molecule to one of the acetate O atoms. In each [QHQ]⁺ cation, there are intramolecular contacts between the Ag and the phenolic O atom of the neutral quinolinol moieties [Ag...O = 2.827 (4) and 2.901 (4) Å].

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