The reactions of the potent and widely used anti-inflammatory drug diclofenac, HL, with diorganotin(IV) oxides were studied. The dimeric tetraorganodistannoxane complexes [Me 2 LSnOSnLMe 2 ] 2 , [Bu 2 LSnOSnLBu 2 ] 2 , [Ph 2 LSnOSnLPh 2 ] 2 and the dibutyltin complex [Bu 2 SnL 2 ], have been prepared and structurally characterized in the solid state by means of vibrational and 1 1 9 Sn Mossbauer spectroscopy. Determination of lattice dynamics by temperature-dependent 1 1 9 Sn Mossbauer spectroscopy. From the variable-temperature Mossbauer effect, the Debye temperature was determined. The complexes have been characterized in solution by NMR ( 1 H and 1 3 C) spectroscopy. Vibrational, Mossbauer, and NMR data are discussed in terms of the proposed structures.