Struktur von 7,11-Diphenyl-2,4-diazaspiro5,5undecan-1,3,5,9-tetraonen durch LIS-NMR

摘要

A semi-quantitative method for determining distances between a possible coordination centre and protons from LIS-NMR values is developed for the title compounds3, although these have four coordination points. This makes it possible to propose structures and conformations for the isomers of3.