Crystal structure of trans-bis(acetone hydrazone)tetrakis(trimethyl phosphite)ruthenium(II) bis(tetraphenylborate) : stabilisation of metal–hydrazone complexes through hydrogen bonding

Abstract

The crystal structure of the title compound has been determined by X-ray diffraction methods from counter data. Crystals are triclinic, space group P, with Z= 1, a= 15·30, b= 11·54, c= 13·74 (±0·01)Å, α= 92·55°, β= 59·02°, γ= 64·49°(±0·01). The structure was solved by heavy-atom methods and refined by least-squares to R 0·069 for 5696 observed reflections. The ruthenium atom has almost ideal octahedral symmetry and the two hydrazone ligands are trans-oriented. Hydrogen bonding between the N-hydrogen of the hydrazone and the oxygen of the phosphite was inferred from observed N–O distances of 2·82 (1) and 2·85 (1)Å. Mean Ru–P, Ru–N, and N–C distances are 2·35, 2·17, and 1·28 Å.