Basicity of nitrogen–sulphur(<scp>VI</scp>) compounds. Part 3. Protonation equilibria of sulphamates using potentiometric and<sup>13</sup>C nuclear magnetic resonance methods
作者:William J. Spillana、Thomas J. Hannigan、Kevin P. Shelly
DOI:10.1039/p29820000019
日期:——
Potentiometric and 13C n.m.r methods have been used to study the sulphamata equilibria in Scheme 1. pKa values for step b have been determined for 19 sulphamates including seven hetero-sulphamates which contain an additionaI nitrogen atom. The determination of pK1(for the hetero-nitrogen atom) and pK2(for the sulphamate nitrogen atom) required the use of a computer program in a few instances where
电位法和13 C nmr方法已用于研究方案1中的磺胺平衡。已经确定了步骤b的p K a值,用于19种氨基磺酸盐,包括7个含额外氮原子的杂硫酸盐。测定p K 1(对于杂氮原子)和p K 2(对于氨基磺酸氮原子)需要在少数两个氮的碱度接近(p K a重叠)的情况下使用计算机程序。值)-p K a已经确定了五种化合物的步骤a的值(约12)。已在H 2中研究了步骤c确定了三种化合物的SO 4和p K值(根据Bunnett和Olsen公式为–1.2至–1.74)
NARDO, M. DE;RUNTI, C.;ULIAN, F., FARMACO. ED. SCI., 1984, 39, N 2, 125-132