Sodium hexachloroosmate explained

Sodium hexachloroosmate is the inorganic compound with the formula . A red solid, it is the disodium salt of the osmium(VI) complex . The anion is an octahedral complex with Os-Cl distance of 2.325(3) Å, as established by X-ray crystallography.^[1] The compound can be prepared by reaction of a suspension of osmium metal in molten sodium chloride with chlorine:^[2]

Hexachloroosmate is paramagnetic, with a low-spin d² configuration.

References

1. 10.1134/S0022476619070096. Crystal Structure of Na2[OsCl6] . 2019 . Rudnitskaya . O. V. . Kultyshkina . E. K. . Dobrokhotova . E. V. . Tereshina . T. A. . Popova . A. S. . Zubavichus . Ya. V. . Khrustalev . V. N. . Journal of Structural Chemistry . 60 . 7 . 1086–1090 . 199474647 .
2. Book: H. L. Grube. Sodium Hexachloroosmate(VI). Handbook of Preparative Inorganic Chemistry, 2nd Ed. . G. Brauer. Academic Press. 1963. NY, NY. 2pages=1602.