Wrap-around encapsulated Cs(dibenzo-24-crown-8)(+) cations form linear coordination polymers with dicyanoargentate anions Ag(CN)(2)(-)

The new macrocyclic dicyanoargentate complex Cs(dibenzo-24-crown-8)[Ag(CN)( 2)] has been prepared and studied by means of X-ray diffraction (monoclinic space group P2(1)/a, with a = 12.730(3), b = 15.343(3), c = 15.323(3) , V = 3005(1) (3), Z = 4, R1 = 0.041; wR2 = 0.048 for 5488 unique reflections w ith I > 3 sigma(I)). The lattice consists of complex Cs(db-24-crown-8)(+) c ations (as an example of the "wrap-around" structure) and[Ag(CN)(2)](-) ani ons forming a one-dimensional polymeric structure. The caesium atoms are co ordinated with 8 oxy Een atoms of the macrocycle and two nitrogen atoms of the dicyanoargentate groups, bonding to the cation on both sides of the cro wn-ether. It is the first structure of a dibenzo-24-crown-8 complex with a large metal cation such as Cs+.