Organometallic compounds with metal-metal bonds. IX. Pentafluorophenyltin derivatives of manganese carbonyl

Article abstract of DOI:10.1021/ic50056a025

Compounds of the series (C₆H₅)_n(C₆F₅) _3-nSnMn(CO)₅ (n = 0, 1, 2) have been prepared by reactions of C₆F₅Li or C₆F₅MgBr with (C₆H₅)_nCl_3-nSnMn(CO)₅. Carbonyl stretching frequencies are assigned and approximate force constants given. A linear relation between carbonyl stretching frequency and electronegativity of substituents on tin suggests a Pauling electronegativity of about 2.4 for the C₆F₅ group. The compounds (C₆F₅)₂Sn [Mn(CO)₅]₂ and (OC)₅Mn(C₆H₅)₂Sn-Sn(C ₆H₅)₂Mn(CO)₅ have also been prepared, the latter containing a four-metal chain. In both of the bis-pentacarbonylmanganese compounds, the number of strong carbonyl bands is greater than five, suggesting that a substantial coupling of Mn(CO)₅ groups takes place across the intervening tin atoms.