Interaction of tin(IV) halides (chloride, bromide and iodide) have been discussed with eleven ortho, meta and para derivatives of pyridine i.e. total number of interactions are 33 x 3 = 99. Tin(IV) halides form most stable complexes with ortho, meta and para derivatives of phenylacetatopyridine and least stable complexes with ortho, meta and para derivatives of nitropyridine. The order is ortho > meta > para. Best interaction is shown by SnBr4 with phenylacetatopyridine-m.