Design and preparation of dinitrogen complexes bearing an arsenic-containing ANA-type pincer ligand and their application to catalytic dinitogen fixation

点击翻译按钮获取中文摘要

A new catalytic system to convert molecular dinitrogen directly into ammonia has been achieved using a dinitrogen-bridged dimolybdenum complex with a PNP-type pincer ligand as a catalyst. Thus the use of an arsenic-containing ANA-type pincer ligand where phosphines in the PNP-type pincer ligand are substituted for arsines has been focuse on in this reserch, for arsines are known to have similar coordination modes to phosphines, but are also recognized to be more reluctant to oxidation, sterically bulkier, and poorer s-donors and p-acceptors compared to phosphines.Novel mono- and dimolybdenum-dinitrogen complexes bearing an arsenic-containing ANA-type pincer ligand are prepared and characterized by X-ray analyses. These complexes afford a stoichiometric amount of ammonia by treatment with sulfuric acid at room temperature.