Reactions of imidodiphosphinochalcogenido ligands [N(QPPh(2))(2)](-) (Q = S, Se) with [Mo-3(mu(3)-S)(mu(2)-S-2)(3)-Br-6](2-) (1) afford the first Mo complexes of such ligands: [Mo(mu(3)-S)(mu(2)-S-2)(3){N(SPPh2)(2)}(3)]Br (2) and [Mo-3(mu(3)-S)(mu(2)-S)(3){N(SePPh2)(2)}(3)]Br (3). In these compIexes the [Mo-3(mu(3)-S)(mu(2)-S-2)(3)](4+) core is maintained and three [N(QPPh(2))(2)](-) ligands are bound to the Mo atoms in a Q,Q-bidentate fashion.