Thirteen substituted 1-naphthoic acids have been prepared and their dissociation constants, along with those of twenty-five substituted 2-naphthoic acids, have been measured potentiometrically in methanol, N,N-dimethylformamide, pyridine, and acetonitrile. The pKHA values obtained have been treated by linear regression using four sets of substituent constants. The experimental data have also been interpreted by statistical methods using latent variables. The first latent variable calculated by these methods can be used as a new set of substituent constants for describing substituent effects in naphthalene skeleton.
已经制备了十三种取代的1-萘甲酸和二十五种取代的2-萘甲酸,并在甲醇、N,N-二甲基甲酰胺、吡啶和乙腈中用电位滴定法测定了它们的解离常数。通过使用四组取代基常数对获得的pKHA值进行线性回归处理。实验数据还通过使用潜变量的统计方法进行解释。通过这些方法计算得到的第一个潜变量可以作为描述萘骨架中取代基效应的新一组取代基常数。