ChemInform Abstract: Multiple Bonds Between Main-Group Elements and Transition Metals. Part 42. The Role of Organotin Compounds in Olefin Metathesis: Synthesis, Structure, and Lewis Acidity of ((η5-C5Me5)CH3ReCl3).
Abstract
By means of the readily accessible, simple Re complexes (I), the elementary steps involved in the reaction of tin-containing cocatalysts with higher-valent, soluble Re compounds are explained.
ChemInform Abstract
By means of the readily accessible, simple Re complexes (I), the elementary steps involved in the reaction of tin-containing cocatalysts with higher-valent, soluble Re compounds are explained. Synthesis, characterization, and reactivity of novel, unusual alkylrhenium(V) complexes are reported. Upon attack of SnMe4 on (I), (IIIa) is obtained. Its structure is deduced from an X-ray structure analysis of the better crystallizing derivative (IIIb) (space group Pbca, Z = 8). Structural reasons allow the reaction with water to give (IV) or with PMe3 to give (VI). When higher alkyltin compounds are allowed to react with (Ia) under otherwise identical conditions, in addition to the corresponding trialkyltin chlorides a Re(IV) complex (VII) is obtained which does not contain the alkyl groups. Its dinuclear constitution is assigned from the diamagnetism and the reaction with PMe3 to give (VIII). A formation mechanism for (VII) is given.
