title: Synthesis and characterization of polynuclear copper(II) complexes with pyridylbis(phenol) ligands.
abstract: Three new pyridylbis(phenol) ligands with imine (H(2)L(imine)), amine (H(2)L(amine)), or amide (H(4)L(amide)) linkages, along with their copper complexes, were synthesized and characterized. Treatment of H(2)L(imine) with copper(II) in the presence of base produced mononuclear copper complex [Cu(L(imine))(MeOH)] (1), while the same procedure with H(2)L(amine) produced trinuclear [Cu(3)(L(amine))(2)(CH(3)CN)(2)](ClO(4))(2) (2). The more rigid H(4)L(amide) forms tetranuclear [Cu(4)(L(amide))(2)(H(2)O)(4)] (3), which upon recrystallization yielded crystals of hexanuclear [Cu(6)(HL(amide))(4)(H(2)O)(2)] (4).
authors.affiliation: Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, USA.
authors.forename: Rajendra
authors.initials: R
authors.lastname: Shakya
authors.forename: Anna
authors.initials: A
authors.lastname: Jozwiuk
authors.forename: Douglas R
authors.initials: DR
authors.lastname: Powell
authors.forename: Robert P
authors.initials: RP
authors.lastname: Houser