Organotin carboxylates have attracted considerable attention because of their wide application in many fields. The coordination number and environment of the tin atom in organotin carboxylates can be controlled by adjusting the steric and electronic factors of the car- boxylic acid ligands and substituents linked to the tin atom. Many investigations have been conducted on organotin carboxylates with functionalized carboxylic acids and additional O, S or N donor groups.