Carbon-13 and proton NMR parameters of mono- and di-organothallium(III) derivatives
作者:F. Brady、R.W. Matthews、M.M. Thakur、D.G. Gillies
DOI:10.1016/0022-328x(83)80054-0
日期:1983.8
conclusion seems reasonable for R = cyclopentyl. |nJ(Tl-C)| in alkenyl derivatives follows the same pattern as for R = acyclic alkyl, but in contrast to alkyl derivatives, 1J and 2J have the same sign. Thallium-proton couplings 2J and 3J also have the same sign for R = alkenyl. Compounds with α,β-unsaturated R groups have very large values of 1J(Tl-C) compared to those with saturated R groups. These increases
分别报道了类型为TlR 2 X和TlRX 2的二有机和单有机organ(III)化合物的碳13和质子偶联常数以及化学位移(X =阴离子物质)。R的性质在三十个无环烷基,脂环族烷基和烯基上变化。对一系列相关衍生物进行了研究,以确定NMR参数所依赖的主要因素。已经合成了几种新的有机th(III)衍生物。溶剂和阴离子(X)变化对NMR参数的影响通常很小。影响J(T1-C)和J(T1-H)的主要因素是与attached连接的R基团的数量以及TlR 2 X和TlRX 2中类似偶联的比率在费米接触贡献占主导地位的这些耦合常数的假设下,它们通常接近于预测值。无环烷基R基团与to的偶联取决于R中的取代程度,并遵循以下模式:1 J | > | 3 J | > | 2 J | > | 4 Ĵ |,± 1 Ĵ,∓ 2 Ĵ,± 3 Ĵ为Ĵ(TL-C)和,除少数例外,| 3 J | > | 2 J | > | 4 Ĵ