Synthesis and structure of cadmium complexes [Me3BuN] 2 + [CdI4]2-, [Ph3(PhCH2)P] 2 + [Cd2I6]2-, [Me3EtN] n + [CdI3] n - , and [Me3NH] n + [CdI3] n -

Complexes with cadmium-containing anions [Me3BuN] (2) (+) [CdI4](2-) (I), [Ph-3(PhCH2)P] (2) (+) [Cd2I6](2-)(II), [Me3EtN] (n) (+) [CdI3] (n) (-) (III), and [Me3NH] (n) (+) [CdI3] (n) (-) (IV) were synthesized by reacting ammonium and phosphonium iodides with cadmium iodide. In the cations, N and P atoms have a distorted tetrahedral coordination, as Cd atom in the mononuclear [CdI4](2-) anion of complex I, too. A centrosymmetric binuclear [Cd2I6](2-) anion contains two terminal (t) CdI2 moieties linked to each other by two bridging (br) iodine atoms (Cd-I-br is 2.8547(3) ; Cd-I-t are 2.7240(3) and 2.7241(3) ). Anions of complexes III and IV are polymeric; CdI2 structural units (Cd-I-t are 2.711(3) , in III and Cd-I-t are 2.7366(6) , in IV) are associated via iodine atoms (Cd-I-br are 2.853(3) in III and Cd-I-br are 2.8472(6) , 2,8421(6) in IV) to form polymer chains.