title: Binuclear palladium(I) and palladium(II) complexes of ortho-functionalized 1,3-bis(aryl)triazenido ligands.
abstract: Three new bis(aryl)triazene ligands, Ar-NNNH-Ar' [Ar = o-C(6)H(4)-CO(2)Me, Ar' = p-C(6)H(4)-CH(3) (2); Ar = Ar' = o-C(6)H(4)-CO(2)Me (3); Ar = o-C(6)H(4)-SMe, Ar' = p-C(6)H(4)-CH(3)) (4)], have been synthesized. The reaction of 1-4 with PdCl(2)(NCCH(3))(2) in the presence of a base afforded a series of binuclear diamagnetic palladium complexes. In these reactions, ligands 1-3 afforded the palladium(I) complexes [Pd(I)(o-MeO(2)C-C(6)H(4)-NNN-o-C(6)H(4)-CO(2)Me)](2) (5, monoclinic, space group P21/c, a = 8.6070(10) Angstrom, b = 14.3220(10) Angstrom, c = 12.7310(10) Angstrom, beta = 100.2950(10) degrees, Z = 2), [Pd(I)(o-MeO-C(6)H(4)-NNN-o-C(6)H(4)-OMe)](2) (6, triclinic, space group P, a = 6.6288(5) Angstrom, b = 10.2631(10) Angstrom, c = 11.0246(11) Angstrom, alpha = 85.579(6) degrees, beta = 80.885(6) degrees, gamma = 74.607(6) degrees, Z = 1), and [Pd(I)(o-MeO(2)C-C(6)H(4)-NNN-p-C(6)H(4)-CH(3))](2) (7, tetragonal, space group I41/a, a = 20.866(3) Angstrom, b = 20.866(3) Angstrom, c = 13.156(2) Angstrom, Z = 8). In contrast, the reaction of ligand 4 with PdCl(2)(NCCH(3))(2) resulted in the formation of a palladium(II) dimer, [Pd(II)(o-MeS-C(6)H(4)-NNN-p-C(6)H(4)-CH(3))Cl](2) (8, orthorhombic, space group P2(1)2(1)2, a = 10.4058(5) Angstrom, b = 16.2488(8) Angstrom, c = 9.9500(5) Angstrom, Z = 2).
authors.affiliation: Centro de Graduados e Investigación, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 22000 Tijuana, B. C. México.
authors.forename: Juan José
authors.initials: JJ
authors.lastname: Nuricumbo-Escobar
authors.forename: Carlos
authors.initials: C
authors.lastname: Campos-Alvarado
authors.forename: Gustavo
authors.initials: G
authors.lastname: Ríos-Moreno
authors.forename: David
authors.initials: D
authors.lastname: Morales-Morales
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Walsh
authors.forename: Miguel
authors.initials: M
authors.lastname: Parra-Hake
mesh_terms: D000588:Amines / Q000737:chemistry; D002621:Chemistry / Q000379:methods*; D003460:Crystallization; D018360:Crystallography, X-Ray / Q000379:methods; D007202:Indicators and Reagents / Q000737:chemistry; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D008968:Molecular Conformation; D010165:Palladium / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D014227:Triazines / Q000737:chemistry*
chemical_list: D000588:Amines; D007202:Indicators and Reagents; D008024:Ligands; D012997:Solvents; D014227:Triazines; D010165:Palladium