Synthesis, structures and stereodynamic behavior of pentacoordinate (O→Si)-Chelate Difluoro(methyl)silylmethyl derivatives of amides and imides
作者:Vadim V. Negrebetsky、Eugeniya P. Kramarova、Aleksander G. Shipov、Yuri I. Baukov、Alexander A. Korlyukov、Dmitry E. Arkhipov、Alan R. Bassindale、Peter G. Taylor、Sergey Yu Bylikin
DOI:10.1016/j.jorganchem.2018.07.027
日期:2018.10
The structures and stereodynamic behavior of (O→Si)-chelate methyldifluorosilanes in solutions were studied by multinuclear (1H, 13C, 19F, 29Si) and 2D (COSY, HETCOR 1H, 13C) NMR spectroscopy. The range of studied complexes included amides RC(O)N(R')CH2SiMeF2 [R = Ph, R' = H (1a); R = R' = Me (1b); R = Me, R' = CHMePh (1c)], lactams LCH2SiMeF2 (L = 2-oxoazepan-1-yl (2a), 2,2-dimethyl-4-oxo-2H-benzo[1
通过多核(1 H,13 C,19 F,29 Si)和2D(COSY,HETCOR 1 H,13 C)NMR光谱研究了(O→Si)-螯合物甲基二氟硅烷在溶液中的结构和立体动力学行为。研究的配合物范围包括酰胺RC(O)N(R')CH 2 SiMeF 2 [R = Ph,R'= H(1a); R = R'= Me(1b); R = Me,R'= CHMePh(1c)],内酰胺LCH 2 SiMeF 2(L = 2-氧杂氮杂-1-基(2a),2,2-二甲基-4-氧-2- H-苯并[1,3 ] oxazin-3-yl(2b)或4-甲基-2-氧代喹啉-1-基(2c)]和六元酰亚胺Im 6 CH 2 [2,6-二氧代哌啶-1-基(3)]。通过溶液中的NMR研究以及配合物1c,2a,2c和3的单晶X射线研究证实了所有研究化合物中硅原子的五配位。溶液中19 F NMR信号所观察到的温度依赖性是通过硅原子配位