Ten new oxalato and sulfato complexes and derivatives containing SnR3 or SnR2 (R=Ph, Me, Bu) have been synthetized and studied by infrared, NMR and Mossbauer spectroscopies. The suggested structures are discretes, infinite or oligomers. The environments around the tin centre are trigonal bipyramidal or octahedral, the oxalate and sulfate anions behave as monochelating and bidentate ligands. When cations are involved, supramolecular architectures are obtained.