Quantum mechanics theoretical methodology has been applied in order to access and compare the relative stability of inclusion compounds formed by alpha-CD and the platinum (II) based drugs carboplatin, oxaliplatin and nedaplatin. The relative stability of the studied inclusion compounds has been discussed based on the number and type of hydrogen bonds identified between host and guest molecules. The evaluated energies at B3LYP/6-31G* level of theory strongly indicates that alpha-CD forms stable supramolecular systems with all studied cisplatin analogues, being the carboplatin@alpha-CD found as the most favorable inclusion complex among the platinum (II) derivatives studied in the present paper. (C) 2011 Elsevier B.V. All rights reserved.