Crystal and molecular structure of mercuriobis(pentacarbonylmanganese), Hg[Mn(CO)5]2
Abstract
The structure of Hg[Mn(CO)5]2 has been determined by single-crystal X-ray diffraction. The crystals are triclinic, space group P, with a= 6·325, b= 9·479, c= 6·330 Å, α= 90·86°, β= 81·66°, γ= 97·44°Z= 1. 1570 independent intensities were estimated visually from equi-inclination Weissenberg photographs, and the structure refined to R 9·28%. The molecule is centrosymmetric and has approximate D4h symmetry, with the carbonyl groups in the eclipsed configuration. The Hg–Mn bond length is 2·806 Å. The co-ordination about the manganese is close to regular octahedral, but the equatorial carbonyl groups are bent inwards towards the mercury atom by 5·3 ± 0·3°.