Application In Synthesis of 5,5′-Dimethyl-2,2′-bipyridine. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,5′-Dimethyl-2,2′-bipyridine, is researched, Molecular C12H12N2, CAS is 1762-34-1, about Syntheses, structures and photocatalytic properties of ruthenium(II) complexes supported by a tetradentate cyclen ligand (cyclen = 1,4,7,10-tetraazacyclododecane). Author is Qian, Bing-Feng; Gao, Yang; Liu, Xiao-Li; Wang, Jun-Ling; Jia, Ai-Quan; Zhang, Qian-Feng.
Treatment of [(cyclen)RuCl(dmso)]Cl (cyclen = 1,4,7,10-tetraazacyclododecane, dmso = dimethylsulfoxide, 1) with zinc powder in the presence of potassium hexafluorophosphate or sodium perchlorate in acetonitrile afforded the cationic complexes [(cyclen)Ru(dmso)(MeCN)]Q2 (Q = PF6 (2), ClO4 (3)). Interaction of 1, zinc powder and 4-tert-butylpyridine or pyridine in the presence of triethylamine and sodium perchlorate gave pyridine-ruthenium(II) complexes Na[(cyclen)Ru(dmso)(4-tBupy)](ClO4)3 (4) and [(cyclen)Ru(py)2](ClO4)2 (5), resp. While reactions of 1, zinc powder and 1,10-phenanthroline (phen) or 5,5′-dimethyl-2,2′-bipyridine (5,5′-Me2bpy) in the presence of triethylamine and potassium hexafluorophosphate gave bipyridine-ruthenium(II) complexes [(cyclen)Ru(phen)](PF6)2 (6) and [(cyclen)Ru(5,5′-Me2bpy)](PF6)2 (7), resp. Complexes 1-7 are characterized by IR, UV/Vis, NMR spectroscopies along with their electrochem. properties. The mol. structures of complexes 1-7 have been established by single-crystal x-ray diffraction. The photocatalytic properties of complexes 6 and 7 with a large π-electron delocalized system for the H2 evolution by water reduction were also investigated in the paper.
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