The complete series of fifteen species of the type Sn(SPh) x(SePh) y(TePh) 4−x−y, including thirteen new species, has been prepared in equilibrium mixtures in solution by reaction of equimolar amounts of Sn(EPh) 2 and Ph 2E′ 2 (E = E′ = S; E = E′ = Se; E = S, E′ = Se; E = Se, E′ = S; E = S, E′ = Te; E = Se, E′ = Te; E = S/Se mixture, E′ = Te; E = S/Se mixture, E′ = Se/Te mixture) and characterized by 119Sn and 77Se and/or 125Te NMR as appropriate. The reaction is thought to involve oxidative insertion followed by redistribution. Equilibrium mixtures of Sn(SPh) x(SePh) 4−x can also be prepared by redistribution of the known compounds Sn(SPh) 4 and Sn(SePh) 4, and by the redox reaction of Sn(EPh) 2 with PhE′H (E = Se, E′ = S; E = S, E′ = Se). Protonation of Sn(EPh) 3 − (E = S or Se) with CF 3SO 3H or CF 3CO 2H is shown to produce Sn(EPh) 4. The 119Sn, 77Se and 125Te NMR chemical shifts and the one-bond 119Sn 77Se and 119Sn 125Te nuclear spin-spin coupling constants can be fitted satisfactorily using established pairwise additivity models. There are smooth correlations between the NMR chemical shifts of the different nuclei, between 1 J( 119Sn 77Se) and 1 J( 119Sn 125Te), and between the various sets of the chemical shift and spin-spin coupling data. The possible origins of these correlations are discussed.