P.m.r. spectroscopy at 60 MHz of trimethylsilyl ethers and esters, prepared from hydroxy acids, gives well resolved sharp singlets in the range τ 9.8–9.9, These signals may be used to determine the ratio of hydroxyl to carboxyl groups in a molecule. Measurements may be made directly on fractions isolated by gas–liquid chromatography. The influence of the solvent on the resolution is demonstrated.
由羟基酸制备的三甲基甲
硅烷基醚和酯在 60
MHz 下的 Pmr 光谱在 τ 9.8-9.9 范围内得到很好分辨的尖锐单峰。这些信号可用于确定分子中羟基与羧基的比率。可以直接对通过气液色谱分离的馏分进行测量。证明了溶剂对分辨率的影响。