129873-48-9

Upstream product

• 132674-18-1 bis(ammine)diruthenium(II)DPB(bis-(1-tert-butyl-5-phenylimidazole)) 
• 132674-19-2 (μ-hydrazine)diruthenium(II)DPB(bis-(1-tert-butyl-5-phenylimidazole)) 
• 106935-77-7 Ru₂(1,8-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethyl)porphinato]biphenylene) 
• 71333-67-0 1-t-butyl-5-phenylimidazole 
• 106935-77-7 C₇₆H₇₆N₈Ru₂ 
• 75-91-2 tert.-butylhydroperoxide 
• 132674-20-5 (μ-diazene)diruthenium(II)DPB(bis-(1-tert-butyl-5-phenylimidazole)) 

Downstream Products

• 132674-18-1 bis(ammine)diruthenium(II)DPB(bis-(1-tert-butyl-5-phenylimidazole)) 
• 132674-19-2 (μ-hydrazine)diruthenium(II)DPB(bis-(1-tert-butyl-5-phenylimidazole)) 
• 129873-49-0 diruthenium(II)DPB(bis-(1-tert-butyl-5-phenylimidazole))bis(pyridine) 

Relevant academic research and scientific papers

Reduced nitrogen hydride complexes of a cofacial metallodiporphyrin and their oxidative interconversion. an analysis of ammonia oxidation and prospects for a dinitrogen electroreduction catalyst based on cofacial metallodiporphyrins

Oxidation of a bis(ammine) complex of a cofacial metallodiporphyrin, (NH3)2Ru 2DPB(1-tert-butyl-5-phenylimidazole)2, leads to N-N bond formation and ultimately yields a bridged dinitrogen complex via bound hydrazine and diazene complexes. Each of the nitrogen hydrides involved in the successive two-electron/two-proton oxidative interconversions - the μ-diazene, μ-hydrazine, and bis(ammine) complexes - have been isolated and characterized. The electrochemical and acid-base properties of each of these complexes are reported. Mechanisms of ammonia oxidation are suggested. Stepwise two-electron/two-proton oxidations from the bis(ammine) complex to the hydrazine complex, from the hydrazine complex to the diazene complex, and from the diazene complex to the dinitrogen complex can be accomplished by tert-butyl hydroperoxide or sequential reaction of ferricinium hexafluorophosphate and a base. The prospects for electrocatalytic six-electron ammonia oxidation and electrocatalytic four-electron reduction of dinitrogen to hydrazine are discussed. On the basis of this analysis, reduction of hydrazine to ammonia by these systems is unlikely due to the energetically unfavorable thermolysis of the N-N bond of the bound hydrazine.

A stable dinitrogen complex of a ruthenium cofacial diporphyrin

An unusually stable, bridged dinitrogen complex of a biphenylene bridged diporphyrin is described. The complex (μ-N2)Ru2DPB(1-tert-butyl-5-phenylimidazole) 2 (DPB = diporphyrinatobiphenylene tetraanion) is proposed as a model for a dinitrogen reduction catalyst based on cofacial metallodiporphyrins. The differences in binding by bridged and nonbridged ligands to the two coordination sites between the porphyrin rings are discussed. The complex's preparation, structural characterization, ligand substitution reactivity, electrochemistry, and acid-base properties are reported. It is proposed that the complex's unusual stability is due to a chelation of the dinitrogen by the two tethered metal centers. Loss of dinitrogen from the complex occurs only through replacement of dinitrogen by an added ligand. The rate of replacement is dependent on the concentration of the added ligand. Advantages of cofacial diporphyrins as dinitrogen electroreduction catalysts compared to monomeric or untethered binuclear dinitrogen complexes are noted.