First structural characterization of completely alkyl-substituted Al–Sb Lewis acid–base adducts

Several Lewis acid–base adducts R3Al←SbR′3 (R′=Et, R=Me (1), Et (2), t-Bu (3); R′=n-Pr, R=Me (4), Et (5), t-Bu (6); R′=i-Pr, R=Me (7), Et (8), t-Bu (9); R′=sec-Bu, R=Me (10), Et (11), t-Bu (12); R′=t-Bu, R=Me (13), Et (14), t-Bu (15)) were obtained by reaction of aluminum trialkyls R3Al and the corresponding antimony trialkyls R′3Sb. For the first time, solid state structures of all-alkyl substituted Al–Sb adducts (3, 9, 13, 14) were determined by single crystal X-ray analysis.