Diaminocyclohexane platinum complexes

A method of treating an animal afflicted with tumor cells sensitive to a water-soluble square-planar DACH cis-platinum (II) four-coordinate complex having the formula:

• ##STR6## wherein:
• X is a monovalent anion selected from the group consisting of monosaccharate, saccharate-4-lactone, shikimate, isethionate, 2-aminoethylsulfate, azetidinecarboxylate, proline, hydroxyproline, pipecolinate, cyclopropanecarboxylate, cyclobutanecarboxylate, cyclopentanecarboxylate, cyclopentenecarboxylate, cyclohexanecarboxylate, cyclohexenecarboxylate, bicine, glycine, 2-amino-ethanesulfonate, 2-chloroethanesulfonate and
• Y is a divalent anion selected from the group consisting of iminodiacetate, isocitratelactone, furanedicarboxylate, cyclopropane-1,1-dicarboxylate, isocitratomonoethylester, N-methyliminodiacetate, N-(2-hydroxyethyl)-iminodiacetate, N-benzyliminodiacetate, N-phenyliminodiacetate, N-(2-acetamido)iminodiacetate, cyclohexane-1,1-diacetate, trans-1,2-cyclopropanedicarboxylate, trans-1,2-cyclobutanedicarboxylate, trans-1,2-cyclopentanedicarboxylate and trans-1,2-cyclohexanedicarboxylate comprising administering to said animal a therapeutically anti-tumor effective amount to said platinum complex.