Organotin carboxylates have attracted considerable attention because of their wide application in many fields [1–3]. 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 [3,4]. Many investigations have been conducted on organotin carboxylates with functionalized carboxylic acids and additional O, S or N donor groups [5].