Abstract: | 18‐crown‐6(18‐C‐6) complexes with K2[M(SeCN)4] (M = Pd, Pt): [K(18‐C‐6)]2[Pd(SeCN)4] (H2O) ( 1 ) and [K(18‐C‐6)]2[Pt(SeCN)4](H2O) ( 2 ) have been isolated and characterized by elemental analysis, IR spectroscopy and single crystal X‐ray analysis. The complexes crystallize in the monoclinic space group P21/n with cell dimensions: 1 : a = 1.1159(3) Å, b = 1.2397(3) Å, c = 1.6003(4) Å, β = 92.798(4)°, V = 2.2111(8) Å3, Z = 2, F(000) = 1140, R1 = 0.0418, wR2 = 0.0932 and 2 : a = 1.1167(3) Å, b = 1.2394(3) Å, c = 1.5968(4) Å, β = 92.945(4)°, V = 2.2071(9) Å3, Z = 2, F(000) = 1204, R1 = 0.0341, wR2 = 0.0745. Both complexes form one‐dimensionally linked chains of [K(18‐C‐6)]+ cations and [M(SeCN)4]2— (M = Pd, Pt) anions bridged by K‐O‐K interactions between adjacent [K(18‐C‐6)]+ units. |