[NABI(EDTA)(H2O)(3)](N) - SYNTHESIS, CRYSTAL-STRUCTURE, AND THERMAL-BEHAVIOR

The synthesis and crystal structure of the EDTA complex [NaBi(EDTA)(H2 O)(3)](n) are reported. It crystallizes in the monoclinic crystal syst em (space group P2(1)/c, a = 6.822(1)Angstrom, b = 16.733(6)Angstrom, c = 13.763(2)Angstrom, beta = 97.13(2)degrees). Bi(EDTA) entities are connected through carboxylate bridges resulting in layers parallel to the (010) plane. These layers are strongly linked by Na carboxylate an d Na-OH2 bridging interactions, establishing short Bi-Na and Na-Na dis tances. Pyrolysis of this complex under sulfur vapor between 600 and 9 00 degrees C leads to the mixed sulfide NaBiS2. Pyrolysis in air shows a very complicated decomposition mechanism and the probable formation of a bimetallic oxycarbonate.