摘要:
Compounds of the composition ZrCl3(OC6H4NO2-p) and ZrCl2(OC6H4NO2-p)(2) have been synthesized from the reaction of ZrCl4 with equimolar and bimolar amounts of the trimethylsilyl derivative of p-nitrophenol in benzene under reflux. Attempts to isolate the tetrakis derivative, Zr(OC6H4NO2-p)(4), even by heating the components in high-boiling solvents were unsuccessful. Based upon analytical data, conductance, cryoscopic, IR and H-1 NMR studies, dimeric structures with bridging through phenoxo groups have been proposed for these compounds. The thermal decomposition of these complexes is a combination of both exothermic and endothermic processes, as is inferred from TG/DT studies. Reactions of these compounds with nitrogen bases viz., pyridine, 1,10-phenanthroline and 2,2'-bipyridyl results in breakdown of the bridged structure and formation of simple addition compounds, which have been assigned octahedral structures.