908302-08-9Relevant academic research and scientific papers
Reaction of β-diketiminate tin(ii) dimethylamide LSnNMe2 [L = HC(CMeNAr)2; Ar = 2,6-iPr2C6H3] with ketones and alkynes
Jana, Anukul,Objartel, Ina,Roesky, Herbert W.,Stalke, Dietmar
, p. 4647 - 4650 (2010/08/21)
The reactions of stable β-diketiminate tin(ii) dimethylamide LSnNMe2 [L = HC(CMeNAr)2; Ar = 2,6-iPr2C 6H3] (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(CF 3)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.
Synthetic, structural, mechanistic, and computational studies on single-site β-diketiminate tin(II) initiators for the polymerization of rac-lactide
Dove, Andrew P.,Gibson, Vernon C.,Marshall, Edward L.,Rzepa, Henry S.,White, Andrew J. P.,Williams, David J.
, p. 9834 - 9843 (2007/10/03)
A family of tin(II) complexes supported by β-diketiminate ligands has been investigated as initiators for the polymerization of rac-lactide. Kinetic studies reveal a first-order dependence on [lactide], but with a significant induction period. Linear plot
