科研之友
微信
新浪微博
Facebook
分享链接
摘要
A comparison of experimental and calculated C-13-nuclear magnetic resonance chemical shifts reveals the molecular structure of a dimer that was obtained by an unexpected dimerization of 1,3-dimethyl-5-methylenebarbituric acid. Furthermore, the puckering angle of the cyclobutane unit linking the six-membered rings is discussed in detail. The influence of substituents on 1,3-position of the cyclobutane ring on the puckering angle is demonstrated based on 1,1,3,3-tetramethylcyclobutane.
- 出版日期2015-5
