Letter | Published:

A Novel Type of Optically Active Complex Metallic Salt


WERNER'S conception of coordinated groups and of auxiliary valency has been extraordinarily useful in classifying and in elucidating the configurations of complex metallic compounds. Although many salts of this class, such as tris-ethylenediamine cobaltic chloride [Co(NH2.CH2.CH2.NH2),]Cl3, have been resolved into optically active components, no proof has hitherto been given that an auxiliary valency linking can render a carbon atom asymmetric. This interesting proposition has been now established by the further study of the recently described salt, tetrachloro(triaminopropane monohydrochloride)platinum, PtCl4, NH2.CH2.CH(NH2).CH2.NH2, HCl, obtained by the action of the -triaminopropane hydrochloride on chloroplatinic acid (Mann, Jour. Chem. Soc., 129, 2681; 1926).

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