asymmetric carbon centers and no asymmetric nitrogen centers, has been resolved using sodium arsenic(III)—(+)-tartrate. The chirality arises by virtue of the coordinated unsymmetric tridentate ligand and the less soluble diastereoisomeride is associated with the (+)-cation. The rate of base hydrolysis was measured spectrophotometrically using tris buffers. Kinetic parameters (25 °C, \3m; ∼ 0.04 M) are
摘要外消旋体-[CoCl(en)(NH 2 CH 2CHNCH2 CH 2 NH 2)] ZnCl 4不含杂配的螯合环,不对称的碳中心和不对称的氮中心,已使用
砷酸钠拆分。 (III)-(+)-
酒石酸盐。手性是通过配位的不对称三齿
配体而产生的,并且难溶的非对映异构体与(+)-阳离子缔合。使用tris缓冲液通过分光光度法测量了碱的
水解速率。动力学参数(25°C,\ 3m;约0.04 M)为k OH = 1.28 X 10 3 M -3 s -1,E a = 87.0±0.7 kJ mol -1和ΔS#; = + 98±1.4JK -1 mol -1。完全消旋伴随着碱
水解反应,旋光性的损失速率是碱
水解的0.5倍。