Carbon-13 magnetic resonance of hydroaromatics. II. Conformation of Tetralin and tetrahydroanthracene and their methyl derivatives
作者:Frederick G. Morin、W. James Horton、David M. Grant、Don K. Dalling、Ronald J. Pugmire
DOI:10.1021/ja00350a042
日期:1983.6
Carbon-13 chemical shift data have been acquired for 36 methylated tetralins and tetrahydroanthracenes. A least-squares regression analysis has been undertaken on the ring carbons of compounds of unequivocal conformation to determine methyl substituent parameters for the two distinct aliphatic positions and the results have been used to estimate the position of equilibrium of conformationally mobile
已获得 36 种甲基化四氢萘和四氢蒽的碳 13 化学位移数据。对明确构象的化合物的环碳进行了最小二乘回归分析,以确定两个不同脂肪族位置的甲基取代参数,结果已用于估计构象移动化合物的平衡位置。得出的结论是,1-甲基萘满在室温下以基本相同的构象异构体存在,但 2-甲基衍生物主要由具有赤道甲基的构象支配。将取代基参数与先前为甲基化环己烷确定的参数进行比较。对甲基化学位移的类似分析没有成功,部分原因是饱和环的高度柔性。