For the purpose of correlation of chemical shifts and geminal coupling constants with stereochemistry a number of compounds of fixed geometry have been synthesized. These include seven 6-substituted 1-phenylphthalans, five 6-substituted 2-methyl-1-phenylisoindolines, and six 2-substituted 5H-dibenzo-[a,d]cycloheptene oxides. The geometrical properties of the three ring systems are discussed and arguments in favor of a quasi-equatorial epoxide substituent in the latter series are supported by n.O.e. measurements.
为了将化学位移和双原子耦合常数与立体化学相关联,已经合成了一些具有固定几何结构的化合物。其中包括七种6-取代的1-苯基萘酚、五种6-取代的2-甲基-1-苯基异吲哚啉和六种2-取代的5H-二苯并[a,d]环庚烷氧化物。讨论了这三个环系的几何特性,并通过n.O.e.测量支持了后一系列中准赤道环氧基取代基的优势论点。