77321-08-5

Basic information

• Product Name: RuBr₂(C₁₁H₉N₃)2
• CAS NO: 77321-08-5
• Molecular Weight: 627.303
• Mol File: 77321-08-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: RuBr₂(C₁₁H₉N₃)2(CAS DataBase Reference)
• NIST Chemistry Reference: RuBr₂(C₁₁H₉N₃)2(77321-08-5)
• EPA Substance Registry System: RuBr₂(C₁₁H₉N₃)2(77321-08-5)

Safety Data

• Hazardous Substances Data: 77321-08-5(Hazardous Substances Data)

Upstream product

• 2569-57-5 2-(phenylazo)pyridine 
• 14898-67-0 ruthenium(III) chloride trihydrate 
• 7550-35-8 lithium bromide 

Downstream Products

• 81554-68-9 bromo(diphenylmethylphosphine)bis[2-(phenylazo)pyridine]ruthenium(II) perchlorate hydrate 

Relevant articles and documents

Chemistry of ruthenium. 2. Synthesis, structure, and redox properties of 2-(arylazo)pyridine complexes

Two types of ruthenium(II) complexes RuX2L2 (green) and [Ru(bpy)2L] (ClO4)2·H2O (red) are reported (X = Cl, Br, I; L = 2-(phenylazo)pyridine or 2-(m-tolylazo)pyridine; bpy = 2,2′-bipyridine). The RuX2L2 species systematically displays single RuX and RuN(pyridine) stretches in the far IR, strongly suggesting a centrosymmetric configuration for the coordination sphere. Both types of complexes have intense t2(Ru) → π*(L) transitions in the visible region. RuCl2L2 is unreactive to Ag+ and nitrogen bases; monodentate tertiary phosphines (P) however give RuClPL2+. Both RuX2L2 and Ru(bpy)2L2+ exhibit reversible or nearly reversible ruthenium(III)-ruthenium(II) couples at platinum electrode. The E°298′ values in acetonitrile are ～+0.9 V for RuX2L2+/RuX2L2 and ～+1.60 V for Ru(bpy)2L3+/Ru(bpy)2L2+ vs. SCE. The azopyridine ligand system greatly stabilizes the +2 oxidation state in ruthenium. The complexes also display electrochemical responses on the negative side of SCE due to ligand-based reductions. Azo reduction occurs quasi-reversibly at ～-0.5 V in Ru(bpy)2L2+. The existence of a blue isomer of RuX2L2 (X = Cl, Br) having cis-RuX2 is briefly noted.