derivatives with substituents in 2- and 6-positions has been synthesized. A number of compounds were investigated by dynamic NMR spectroscopy. Restricted rotation was observed in 3-methyl-2-neopentylbenzoic acid and its derivatives. Thermodynamic and Arrhenius parameters were obtained for the restricted rotation of the neopentyl group. An additional Me group in 3-position causes a COOMe group in 2-position
合成了一系列在2-和6-位具有取代基的新戊苯衍
生物。通过动态NMR光谱研究了许多化合物。在3-甲基-2-新
戊基苯甲酸及其衍
生物中观察到旋转受限。获得了新戊基的受限旋转的热力学和阿累尼乌斯参数。在3位的另外的Me基团导致在2位的COOMe基团旋转出芳族环的平面,并且该改变有效地将新戊基的旋转障碍减小了约1kcalmol -1。