title: Metal-mediated controllable creation of secondary, tertiary, and quaternary carbon centers: a powerful strategy for the synthesis of iron, cobalt, and copper complexes with in situ generated substituted 1-pyridineimidazo[1,5-a]pyridine ligands.
abstract: An efficient strategy for the synthesis of a wide variety of coordination complexes has been developed. The synthetic protocol involves a solvothermal in situ metal-ligand reaction of picolinaldehyde, ammonium acetate, and transition-metal ions, leading to the generation of 12 coordination complexes supported by a novel class of substituted 1-pyridineimidazo[1,5-a]pyridine ligands (L1-L5). The ligands L1-L5 were afforded by metal-mediated controllable conversion of the aldehyde group of picolialdehyde into a ketone and secondary, tertiary, and quaternary carbon centers, respectively. Complexes of various nuclearities were obtained: from mono-, di-, and tetranuclear to 1D chain polymers. The structures of the in situ formed complexes could be controlled rationally via the choice of appropriate starting materials and tuning of the ratio of the starting materials. The plausible mechanisms for the formation of the ligands L1-L5 were proposed.
authors.affiliation: Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, People's Republic of China.
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Zhou
authors.initials: Z
authors.lastname: Chen
authors.forename: Yonglu
authors.initials: Y
authors.lastname: Liu
authors.forename: Hailiang
authors.initials: H
authors.lastname: Hu
authors.forename: Wenqian
authors.initials: W
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Yahong
authors.initials: Y
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Lei
authors.forename: Yanyuan
authors.initials: Y
authors.lastname: Cao
authors.forename: Zhenghui
authors.initials: Z
authors.lastname: Kang
authors.forename: Miaoshui
authors.initials: M
authors.lastname: Lin
authors.forename: Wu
authors.initials: W
authors.lastname: Li
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007093:Imidazoles / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry*
chemical_list: C542275:1-pyridylimidazo(1,5-alpha)pyridine; D007093:Imidazoles; D008024:Ligands; D009942:Organometallic Compounds; D011725:Pyridines; D003035:Cobalt; D002244:Carbon; D003300:Copper; D007501:Iron