title: Lewis acid-base adducts of group 13 elements: synthesis, structure and reactivity toward benzaldehyde.
abstract: Lewis acid-base adducts [LGa-M(C6F5)3] (M = B 1, Al 2, Ga 3) were prepared by the reaction of gallanediyl LGa {L = HC[C(Me)N(2,6-i-Pr2C6H3)]2} with the Lewis acids M(C6F5)3 (M = B, Al, Ga). Benzaldehyde reacts with [LGa-M(C6F5)3] (M = B 1, Al 2) at room temperature with the insertion and formation of [LGa(C6F5){CH(Ph)(OB(C6F5)2)}] (4) and the zwitterionic species [LGa(C6F5){CH(Ph)(OAl(C6F5)2)}] (5), respectively, which was found to decompose at 80 °C with the formation of {(C6F5)2Al(OCH2Ph)}2 (6). Any attempts to isolate the insertion complex of [LGa-Ga(C6F5)3] with benzaldehyde failed and only {(C6F5)2Ga(OCH2Ph)}2 (7) was isolated at elevated temperatures. 2-5 and 7 were structurally characterized by heteronuclear NMR spectroscopy and single crystal X-ray diffraction.
authors.affiliation: Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany. stephan.schulz@uni-due.de.
authors.forename: C
authors.initials: C
authors.lastname: Ganesamoorthy
authors.forename: M
authors.initials: M
authors.lastname: Matthias
authors.forename: D
authors.initials: D
authors.lastname: Bläser
authors.forename: C
authors.initials: C
authors.lastname: Wölper
authors.forename: S
authors.initials: S
authors.lastname: Schulz