SYNTHESIS AND COORDINATION CHEMISTRY OF A NEW BISTETRAZOLE - A 1D-METALLOPOLYMER VIA SELF-ASSEMBLY OF MONOMERIC ZINC(II)-BUILDINGBLOCKS

The new bistetrazole 13 has been obtained by subsequent formation of the two heterocyclic units. In methanolic solution 13 reacts with zinc(II) acetate to yield the pseudo-meso-1D-coordination polymer [ZnL(2)(MeOH)](n) (n = infinity) 14. The structure of 14 was established by single crystal X-ray diffraction. The generation of the polymeric chain 14 is understandable, if intermediate formation of coordinatively unsaturated zinc(II) buildingblocks (Delta)-15 and (Lambda)-15 is assumed. Alternating linkage of the self-complementary chiral monomers 15, across one cyanofunction each, leads to 14 with zinc being essentially octahedrally coordinated. Compared with polymeric compounds of similar bridging ligands, the Zn N=C-distance in 14 (225,7 pm) is short.