Synthesis and Characterization of Neutral and Cationic Intramolecularly Coordinated Aluminum Compounds. Structural Determination of [(Pytsi)AlMe]~+[MeB(C_6F_5)_3]~- [(Pytsi = C(SiMe_3)_2SiMe_2(2-C_5H_4N)]

摘要

The synthesis and structure of neutral and cationic aluminum compounds equipped with the intramolecular donating C(SiMe_3)_2SiMe_2(2-C_5H_4N) ligand denoted by Pytsi is described.The compounds (Pytsi)AlMe_2 (1),(Pytsi)AlEt_2 (2),[(Pytsi)AlMe]~+[MeB(C_6F_5)_3]~- (3),and [(Pytsi)AlMe(thf)]~+[MeB(C_6F_5)_3]~- (3 centre dot thf) have been synthesized and characterized by standard methods,and the molecular structures of 1,2,and 3 have been determined by single-crystal X-ray analyses.Compound 3 was obtained by an addition of 1 equiv of B(C_6F_5)_3 to the dimethyl species 1.The salt-like title compound 3 shows a methyl group in a bridging position between Al and B atoms consisting of a long Al-C distance of 2.380(2) A and a B-C bond length of 1.681(3) A.