作者:J.A. Peters、J.M. Van Der Toorn、H. Van Bekkum
DOI:10.1016/0040-4020(75)80226-2
日期:1975.1
The conformation of bicyclo[3.3.1]nonane-3α,7α-dicarboxylic acid and its dimethyl ester has been studied by comparing 1H NMR and 13C NMR spectra of these compounds with those of some model 3,7-disubstituted bicyclo[3.3.1]nonanes, fixed in a single conformation by the use of adamantane as an integrated holding group or by means of suitable substitution. It is shown that the dicarboxylic acid and its
通过比较这些化合物的1 H NMR和13 C NMR谱图与某些模型的3,7-二取代双环[3.3]谱图,研究了双环[3.3.1]壬烷-3α,7α-二羧酸及其二甲酯的构象。.1]壬烷,通过使用金刚烷作为一个整体的保留基团或通过适当的取代固定在一个构象中。结果表明,二羧酸及其二甲基酯主要以两个快速相互转化(相同)的椅形结构存在,并且环明显扁平。双人船构型的人口似乎很少。