title: Cu(I) or Cu(I)-Cu(II) mixed-valence complexes of 2,4,6-Tri(2-pyridyl)-1,3,5-triazine: syntheses, structures, and theoretical study of the hydrolytic reaction mechanism.
abstract: The reactions of 2,4,6-tri(2-pyridyl)-1,3,5-triazine (tpt) with copper(I) halides under solvothermal or traditional conditions yielded two polymeric Cu(I) complexes [Cu2I2(tpt)]n (1) and [Cu3I3(tpt)]n (2), one mixed-valence Cu(I)-Cu(II) complex [Cu4Cl2I4(tpt)2] (3), and two Cu(II) complexes [CuBr(bpca)] (4) and [CuI(bpca)] (5) (bpca = bis(2-pyridylcarbonyl)amine). Complex 1 is a zigzag chain with tpt in a bis-bipyridine-like coordination mode, whereas complex 2 with tpt chelating three Cu(I) cations is a ladderlike coordination polymer. Complex 3 is mixed-valence, with Cu(I) in a distorted tetrahedral geometry and Cu(II) in a distorted square pyramidal geometry, forming a ladderlike supramolecular chain. Complexes 4 and 5 are the products of in situ hydrolysis of tpt involving the oxidation of Cu(I). The synthesis and characterization of complex 1, 2, and 5 indicated that Cu(I) cannot promote the hydrolysis of tpt. The theoretical study shows that the main effect for hydrolysis of tpt is the electron-withdrawing effect of metal ions.
authors.affiliation: Department of Chemistry, Shantou University, Guangdong 515063, P. R. China.
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Zhou
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Shao-Liang
authors.initials: SL
authors.lastname: Zheng
authors.forename: Xuanjun
authors.initials: X
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006868:Hydrolysis; D008024:Ligands; D008956:Models, Chemical; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D014227:Triazines / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D014227:Triazines; D003300:Copper; C002849:2,4,6-tripyridyl-s-triazine