Synthesis, crystal structure, and thermal behavior of a diiron toluenethiolate complex with triphenylphosphine coligand

• Published in: Transition metal chemistry (Weinheim) Vol. 45; no. 8; pp. 569 - 575
• Main Authors: Martinez, Jacob A., Gerasimchuk, Nikolay N., Mebi, Charles A.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.11.2020; Springer Nature B.V
• Subjects: Carbon monoxide; Carbonyls; Catalysis; Chemistry; Chemistry and Materials Science; Crystal structure; Crystallography; Inorganic Chemistry; Organometallic Chemistry; Physical Chemistry; Thermodynamic properties
• ISSN: 0340-4285; 1572-901X
• DOI: 10.1007/s11243-020-00409-5

A bis ( p -toluenethiolato) dinuclear-carbonyl complex with triphenylphosphine coligand, [ μ -(SC 6 H 4 CH 3 - p ) 2 Fe 2 (CO) 5 (PPh 3 )], has been synthesized from [ μ -(SC 6 H 4 CH 3 - p )) 2 Fe 2 (CO) 6 ] via facile CO substitution by PPh 3 in 33% yield. The structure of [ μ -(SC 6 H 4 CH 3 - p ) 2 Fe 2 (CO) 5 (PPh 3 )] has been determined by X-ray crystallography and spectroscopic measurements. In the solid state, the compound adopts a butterfly conformation with anti -orientation of the p -tolyl groups and apical position of triphenylphosphine. Thermogravimetric studies reveal that [ μ -(SC 6 H 4 CH 3 - p ) 2 Fe 2 (CO) 5 (PPh 3 )] undergoes sequential decomposition eliminating all of the CO ligands at ca 197 °C, followed by cleavage of the tolyl and PPh 3 groups below ca 258 °C.