Reactions of diphosphine-stabilized Os3 clusters with triphenylantimony: syntheses and structures of new antimony-containing Os3 clusters via Sb-Ph bond cleavage

Fahmida Islam; Md Sohag Hasan; Shishir Ghosh; Michael G Richmond; Shariff E Kabir; Herbert W Roesky

doi:10.1039/d2ra07284j

Reactions of diphosphine-stabilized Os₃ clusters with triphenylantimony: syntheses and structures of new antimony-containing Os₃ clusters via Sb-Ph bond cleavage

RSC Adv. 2023 Jan 18;13(5):2841-2851. doi: 10.1039/d2ra07284j.

Authors

Fahmida Islam¹, Md Sohag Hasan¹, Shishir Ghosh¹, Michael G Richmond², Shariff E Kabir^{1

3}, Herbert W Roesky³

Affiliations

¹ Department of Chemistry, Jahangirnagar University Savar Dhaka 1342 Bangladesh sghosh_006@yahoo.com skabir_ju@yahoo.com.
² Department of Chemistry, University of North Texas 1155 Union Circle, Box 305070 Denton TX 76203 USA.
³ Institute of Inorganic Chemistry, Georg-August University of Göttingen Tammannnstr 4 37077 Göttingen Germany hroesky@gwdg.de.

Abstract

The reactivity of the trimetallic clusters [Os₃(CO)₁₀(μ-dppm)] [dppm = bis(diphenylphosphino)methane] and [HOs₃(CO)₈{μ₃-Ph₂PCH₂PPh(C₆H₄-μ₂,σ¹)}] with triphenylantimony (SbPh₃) has been examined. [Os₃(CO)₁₀(μ-dppm)] reacts with SbPh₃ in refluxing toluene to yield three new triosmium clusters [Os₃(CO)₉(SbPh₃)(μ-dppm)] (1), [HOs₃(CO)₇(SbPh₃){μ₃-Ph₂PCH₂PPh(C₆H₄-μ₂,σ¹)}] (2), and [HOs₃(CO)₇(SbPh₃)(μ-C₆H₄)(μ-SbPh₂)(μ-dppm)] (3). [HOs₃(CO)₈{μ₃-Ph₂PCH₂PPh(C₆H₄-μ₂,σ¹)}] reacts with SbPh₃ (excess) at room temperature to afford [Os₃(CO)₈(SbPh₃)(η¹-Ph)(μ-SbPh₂)(μ-dppm)] (4) as the sole product. A series of control experiments have also been conducted to establish the relationship between the different products. The molecular structure of each product has been determined by single-crystal X-ray diffraction analysis, and the bonding in these new clusters has been investigated by electronic structure calculations.