The crystal structure of Tris(1,10-phenanthroline)osmium(II) Bis(perchlorate) monohydrate and its implications for electron-pair repulsion theory

Abstract

The crystal structure of the title compound, [Os(phen)₃](ClO₄)₂.c. 1H₂O, has been determined by single-crystal X-ray diffraction methods at 295 K, being refined to a residual of 0.043 for 3477 'observed' independent reflections. Crystals are monoclinic, C2/c, a 35.94(2), b 16.020(5), c 12.370(5) Å, β 102.38(3)º, Z 8, and are isostructural with the copper(II) analogue. Osmium-nitrogen distances range from 2.066(7) to 2,082(7) Å (mean, 2.07₅ Å). Departures of the stereochemistry of tris- (α, α'-diimine)metal systems from the expectations of electron-pair repulsion theory are examined.