title: Reaction of β-diketiminate tin(II) dimethylamide LSnNMe₂ [L = HC(CMeNAr)₂; Ar = 2,6-iPr₂C₆H₃] with ketones and alkynes.
abstract: The reactions of stable β-diketiminate tin(II) dimethylamide LSnNMe₂ [L = HC(CMeNAr)₂; Ar = 2,6-iPr₂C₆H₃] (1) with ketones and activated terminal alkynes are described. 1 reacts with 2-benzoylpyridine and 2,2,2-trifluoroacetophenone to give the tin(II)-alkoxides LSnOCPh(2-Py)NMe₂ (2) and LSnOCPh(CF₃)NMe₂ (3), respectively, by nucleophilic addition of the dimethylamido group to the carbonyl moiety. Furthermore, the reaction of 1 with terminal alkynes (HCCCO₂R, R = Me, Et) forms tin(II)-alkynyl LSnCCCO₂R (R= Me, (4); R = Et, (5)) compounds under elimination of Me₂NH rather than undergoing a nucleophilic addition reaction at the carbon–carbon triple bond. Compounds 2-5 were characterized by microanalysis and multinuclear NMR spectroscopy. Moreover, 2 and 5 could be crystallized and their constitutions were confirmed by X-ray structural analysis. 2 and 5 are monomers in the solid state and the metal atom shows a distorted trigonal-pyramidal coordination sphere.
authors.affiliation: Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077, Göttingen, Germany.
authors.forename: Anukul
authors.initials: A
authors.lastname: Jana
authors.forename: Ina
authors.initials: I
authors.lastname: Objartel
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Roesky
authors.forename: Dietmar
authors.initials: D
authors.lastname: Stalke