The present invention relates to mononuclear coordination compounds of Au and Cu, pharmaceutical formulations based thereof, the relative method of synthesis and encapsulation of the compounds in macromolecules, supramolecular aggregates or nanostructures, as well as their use for the diagnosis and/or treatment of neoplasia. Advantageously, such coordination compounds and/or formulations may contain carbohydrates which act as "cancer-targeting moieties" thereby increasing therapeutic selectivity. Said compounds and formulations are characterized by a promising toxicological profile, a remarkable and highly-selective anti-cancer activity, as well as stability and solubility in the physiological means.