NMR chemical shift and NMR isotope shift evidence for the influence of nonbonded interactions on charge distribution in .alpha.,.beta.-unsaturated methoxycarbenium ions
作者:David A. Forsyth、Virginia M. Osterman、John R. DeMember
DOI:10.1021/ja00290a014
日期:1985.2
Determinationdes deplacements chimiques de 13 C etdes effets isotopiques du deuterium. Mise en evidence des interactions non liees sur la distribution de charge. Distinction des isomeres ZetE
Determination des deplacements chimiques de 13 C et des effets isotopiques du deuterium。Mise en evidence des interacts non liees sur la distribution decharge。异分异构体 Z 和 E
Solutions of carbonyl compounds in dibromodifluoromethane in the presence of hydrogen bromide: protonation of ketones and formation of 1 -bromo-alcohols from aldehydes
作者:John Emsley、Victor Gold、M. Jamil B. Jais、Leszek Z. Zdunek
DOI:10.1039/p29820000881
日期:——
HBr in CBr2F2 is capable of protonating a variety of ketones, and at low temperatures separate 1H n.m.r. signals can be seen for the acid and protonated base. Line shape analysis of the signals enables rates of protonation to be calculated. Aldehydes in HBr–CBr2F2 give n.m.r. spectra that are consistent with the formation of 1-bromoalcohols.
CBr 2 F 2中的HBr能够使各种酮质子化,并且在低温下可以看到酸和质子化碱的1 H nmr信号。信号的线形分析可以计算质子化率。HBr–CBr 2 F 2中的醛具有与1-溴代醇形成一致的nmr光谱。
Oxonium ions. Solvation by single acetonitrile molecules in the gas phase and by bulk solvents
作者:J. Bromilow、J. L. M. Abboud、C. B. Lebrilla、R. W. Taft、G. Scorrano、V. Lucchini