Some new tin(IV) compounds of the general formula Sn(SC 6 H 4 R) 4 , where R ¼ o-NH 2 , p-Me, p-Bu-t have been obtained from the direct reaction of (RC 6 H 5 S) 2 and tin metal in the molar ratio 2:1 in refluxing toluene. Similarly, a mixture of tin (RC 6 H 5 S) 2 and iodine in 1.0:1.5:0.5 or 1.0:1.0:1.0 molar ratios in refluxing toluene leads to the formation of Sn(SC 6 H 4 R) 3 I or Sn(SC 6 H 4 R) 2 I 2 , respectively. Complexes of the new tin compounds with triphenylphosphine, 4-picoline, 1,10-phenanthroline and 2,2 0 -bipyridine have been synthesized by the direct reaction between the tin compound and the *Current address: