Evidences of the formation of a tin(IV) complex in citric–citrate buffer solution: A study based on voltammetric, FTIR and ab initio calculations

We studied the Sn(IV)-complex, [Sn(C6H4O7)2]2− formed after anodic dissolution of a tin surface through its passive oxide film in citric–citrate aqueous solution buffer pH 3. Tin-complex was experimentally characterized using infrared spectroscopy while ab initio calculations were made to study its structure and vibrational properties. These calculations gave us a precise knowledge of the normal modes of vibration taking into account that in the...