Ten organotin selenito compounds obtained on allowing Se0 3 (SnPh 3 ) 2 to react with triphenylphosphine oxyde, urea and tetraphenylphosphonium-tetramethylammonium-acetonyltriphenylphosphonium-and tetraethylammonium halides or pseudo halides have been studied by infrared and Mössbauer spectroscopies, then discrete and infinite chains structures suggested on the basis of spectroscopic data.