1) five-membered ring
五元环;五原子环
2) five-membered ring
五原子环
3) five-membered ring
五元杂环
1.
The fluorescence of three heterocyclic organic compounds with five-membered ring have been studied by B3LYP method of DFT, in this paper.
采用密度泛函理论(DFT)中的B3LYP方法,在6 31G 水平上对三种五元杂环物质进行了构型优化,对优化后的构型做振动分析,均未出现虚频率。
4) five-membered ether ring
五元醚环
6) fifteen-ring,fifteen-membered ring
十五元环
补充资料：五元
1.古代一种纪年法。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条