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• W2069206887 abstract "Racemic mer-[CoCl(en)(NH2CH2CHNCH2CH2NH2)]ZnCl4, which contains no dissymetric chelate rings, no 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 kOH = 1.28 X 103 M−3 s−1, Ea = 87.0 ± 0.7 kJ mol−1 and ΔS#; = +98 ± 1.4 J K−1 mol−1. Complete racemisation accompanies the base hydrolysis reaction and the rate of loss of optical activity is 0.5 times that of base hydrolysis. These data are interpreted in terms of the formation of a symmetrical trigonal bipyramid intermediate generated from the conjugate base." @default.
• W2069206887 created "2016-06-24" @default.
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• W2069206887 date "1986-05-01" @default.
• W2069206887 modified "2023-10-16" @default.
• W2069206887 title "Anionopentaaminecobalt(III) complexes with polyamine ligands. 25. The resolution and base hydrolysis kinetics of mer-[CoCl(en)(NH2CH2CH  NCH2CH2NH2)]ZnCl4, a complex with an unsymmetrical triamine ligand" @default.
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• W2069206887 doi "https://doi.org/10.1016/s0020-1693(00)87703-8" @default.
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