Crystal structure of [μ-1κ2C1, C4:2(1,2,3,4-η)-1,2,3,4-tetra-phenyl-buta-1,3-diene-1,4-di-yl]bis-(tri-carbonyl-osmium)(Os- Os)

Erin F Rutledge; Kylie M Wilson; Stephanie M Martin; John W Swartout; Ashley K Archambeau; Emily R Mikeska; Gregory L Powell; Eric W Reinheimer; Cynthia B Powell

doi:10.1107/S2056989018011179

Crystal structure of [μ-1κ²C¹, C⁴:2(1,2,3,4-η)-1,2,3,4-tetra-phenyl-buta-1,3-diene-1,4-di-yl]bis-(tri-carbonyl-osmium)(Os- Os)

Acta Crystallogr E Crystallogr Commun. 2018 Aug 14;74(Pt 9):1235-1238. doi: 10.1107/S2056989018011179. eCollection 2018 Sep 1.

Authors

Erin F Rutledge¹, Kylie M Wilson¹, Stephanie M Martin¹, John W Swartout¹, Ashley K Archambeau¹, Emily R Mikeska¹, Gregory L Powell¹, Eric W Reinheimer², Cynthia B Powell¹

Affiliations

¹ Department of Chemistry & Biochemistry, Abilene Christian University, Abilene, TX 79699, USA.
² Rigaku Oxford Diffraction, The Woodlands, Texas 77381, USA.

Abstract

In the title complex C₃₄H₂₀O₆Os₂ or (μ-η⁴-C₄Ph₄)Os₂(CO)₆, one Os atom is part of a metalla-cyclo-penta-diene ring, while the second Os atom is π-bonded to the organic portion of this ring. The distance of 2.7494 (2) Å between the two Os atoms is typical of an Os-Os single bond. Three carbonyl ligands are attached to each Os atom and these six carbonyls adopt an eclipsed conformation. There are no bridging or semibridging CO groups. Two carbonyl ligands and all four phenyl groups are disordered over two slightly different positions for which each atom in the minor components is displaced less than 1 Å from the corresponding atom in the major components. The refined occupancies of the major com-ponents of the carbonyl ligands are 0.568 (16) and 0.625 (13), while those for the phenyl rings are 0.50 (3), 0.510 (12), 0.519 (18), and 0.568 (12).

Keywords: crystal structure; diene ligand; disorder; microwave heating; osmium carbonyl; osmole complex.

Grants and funding

This work was funded by The Welch Foundation grant R-0021. Abilene Christian University Office of Undergraduate Research grant . Abilene Christian University Pursuit grant grant .