title: First-row transition-metal complexes of a new pentadentate ligand, alpha,alpha,alpha',alpha'-tetra(pyrazolyl)lutidine.
abstract: A new pentadentate ligand, alpha,alpha,alpha',alpha'-tetra(pyrazolyl)lutidine, pz 4lut, has been prepared by a CoCl 2-catalyzed rearrangement reaction between 2,6-pyridinedicarboxaldehyde and dipyrazolylthione. The coordination chemistry with some divalent first-row transition metal (Mn, Fe, Co, Ni, Cu, and Zn) chlorides has been explored. The electronic properties indicate that the new kappa (5)N ligand is a slightly stronger-field donor to Ni (2+) and Co (2+) than a related pentadentate ligand with five pyridyl donors presumably because of greater interaction between the metal and axial pyridyl.
authors.affiliation: Department of Chemistry, Marquette University, Milwaukee Wisconsin 53201-1881, USA.
authors.forename: Tyler J
authors.initials: TJ
authors.lastname: Morin
authors.forename: Brian
authors.initials: B
authors.lastname: Bennett
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Lindeman
authors.forename: James R
authors.initials: JR
authors.lastname: Gardinier
mesh_terms: D004583:Electrons; D008024:Ligands; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry; D011725:Pyridines / Q000138:chemical synthesis* / Q000737:chemistry; D028561:Transition Elements / Q000737:chemistry*
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D011720:Pyrazoles; D011725:Pyridines; D028561:Transition Elements; C533503:alpha,alpha,alpha',alpha'-tetra(pyrazolyl)lutidine