Bordwell's method of overlapping indicators was used to determine the pKa values of some of the most popular (thio)urea organocatalysts via UV spectrophotometric titrations. The incremental effect of CF3 groups on acidic strength was also investigated. The pKa's are in the range of 8.5–19.6. The results may lead to a better understanding of noncovalent organocatalysis and may aid in future catalyst development.
狼啸天
Qi
杳鸢
sutharsons
tuanheqi
123
梦回
尤尢
浦肯野
紫色水晶之恋
樱桃猴子
morena
白桦
善良冷雁
迟大猫
114
苏卿
大模型
模糊中正
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