Conformational consequences of metallo-methyl interactions: A 13C nuclear magnetic resonance study
作者:W. Adcock、B.D. Gupta、W. Kitching、D. Doddrell
DOI:10.1016/s0022-328x(00)95195-7
日期:1975.12
A number of model benzyl-organometallic systems have been synthesized and characterised, and their proton-decoupled natural-abundance 13C NMR spectra measured and assigned. A comparison of the 13C chemical shifts of carbons formally para to the carbonmetal (CM) bond strongly supports the importance of hyperconjugative interactions in the neutral ground state for metallomethyl substituents. Further
已合成并表征了许多模型的苄基有机金属系统,并对其进行了质子去耦的自然丰度13 C NMR光谱进行了测量和分配。所述的比较13个碳原子的正式Ç化学位移对位到carbonmetal(CM)键强烈支持hyperconjugative相互作用在中性接地状态metallomethyl取代基的重要性。此外,对碳-金属偶合常数的分析已明确定义了新概念的普遍性和起源(超共轭),即苄基体系中的大五键碳-金属偶合。的利用5 Ĵ(13 C 117119锡)的结构和立体化学的证明。