Exposure of dilute solutions of acetobromoglucose in CD3OD to 60Co γ-rays at 77 K resulted in dissociative electron capture with loss of bromide. The resulting tetraacetyl-glucosyl radical had an esr spectrum dominated by a large hyperfine coupling of the β-proton (ca. 41.5 G) indicating that the initial chair conformation was retained. On annealing partial conversion to the more stable boat conformation
在77 K下,将CD 3 OD中的
乙酰溴葡萄糖稀溶液暴露于60 Coγ射线中,导致解离电子捕获,而
溴化物损失。所得的四乙酰基-
葡萄糖基自由基的esr谱以β-质子(约41.5 G)的大超精细偶合为主导,表明保留了最初的椅子构象。退火后,观察到在液相中部分转化为更稳定的舟形结构。