STUDIES ON SYNTHESIS, CHARACTERIZATION AN D STRUCTURE OF THE COMPOUNDS 8C6)(2)(C4H8O2)](HGI3)(2))CENTER-DOT-3C(4)H(8)O(2)

The crystals of the title compounds were synthesized by solvent extrac tion of Hg(II) with DB18C6 and TPPO in CHCl3 solution from KI media,an d recrystallization in C4H8O2. They have been studied by melting point determination and TG, IR analysis,and have been structurally characte rized by singlecrystal X - ray diffraction techniques. Crystals of the complexes are triclinic,space group <P(1)over bar> with a = 1.4211(2) , b = 1.4488(4), c = 1.4934(4)nm; alpha = 113.61 (2), beta = 110.78(1) , gamma = 87.29(2)degrees. In the crystals, every K is coordinated by the six oxygen atoms of the DB18C6,one oxygen atom of the TPPO,and eve ry two K are coordinated by two oxygen atoms of the C4H8O2. Dipolymer [(K . TPPO . DB18C6)(2) (C4H8O2)](2+) cations can be considered to be based on a centrosymmetric bridged dimetric arrangement. Every two Hg were halogen - bridged by two I to be a dipolymer (HgI3)(2)(2-) anions . The anions and the cations arrange in order every other. The other t hree C4H8O2 fill in the gap of the lattices.