This invention comprises the synthesis and the use of a new class of cisplatin analogs. These analogs are complexes formed between tetrachloroplatinum (II) and triethylenetetraamine or its derivatives. The stoichiometric ratio between cisplatin and triethylenetetraamine or its derivatives is between 0.4:1 to 0.5:0.8. The complexes are to be used in cancer treatment; they may also be used to treat AIDS patients.