Carbon-13 NMR spectroscopy indicates that amides bearing a triethyleneoxide substituent at nitrogen exist as a mixture of E and Z isomers; the change in isomer ratio upon addition of KSCN can be used to determine the association constant for chelation.
碳13核磁共振波谱表明,在氮上带有三
环氧乙烷取代基的酰胺以E和Z异构体的混合物形式存在。加入KSCN后异构体比例的变化可用于确定螯合的缔合常数。