Hydrates of Organic Compounds. VIII. The Effect of Carboxylate Anions on the Formation of Clathrate Hydrates of Tetrabutylammonium Carboxylates
作者:Haruo Nakayama、Shigeru Torigata
DOI:10.1246/bcsj.57.171
日期:1984.1
clathrate-like hydrates. The results can be summarized as follows: (1) for 14 carboxylates the formation of a clathrate-like hydrate is newly confirmed; (2) judging from melting points and hydration numbers, the hydrates can be classified into three groups: I, II, and III; (3) the group I hydrates, formed by the carboxylates with R=H, CH3, C2H5, n-C3H7, i-C3H7, and t-C4H9, have hydration numbers around
检查了四丁基羧酸铵 (n-C4H9)4 NOOCR(R=Hn-C10H21,包括被甲基或乙基取代的各种烷基)与水的二元混合物的固液相图,以确认形成笼状水合物。结果可概括如下: (1) 14 种羧酸盐形成了笼形水合物;(2)从熔点和水合数判断,水合物可分为I、II、III三类;(3) 由 R=H、CH3、C2H5、n-C3H7、i-C3H7 和 t-C4H9 的羧酸盐形成的 I 组水合物的水合数约为 30,是本研究中最稳定的水合物实验,除了 2-甲基丙酸酯和 2,2-二甲基丙酸酯水合物;(4) II组水合物,水合数约为 39,由 R=n-C4H9、s-C4H9、i-C4H9 和所有 C5H11 的盐形成,并且相对不稳定(mp=5–11 °C);(5) III 组水合物,...