A dinuclear manganese(III) and a rare pentanuclear manganese(111) compound with a phenol-pyrazole ligand

作者：Viciano Chumillas Marta; Tanase Stefania; Mutikainen Ilpo; Turpeinen Urho; de Jongh L Jos^*; Reedijk Jan

来源：Polyhedron, 2012, 38(1): 178-184.

DOI：10.1016/j.poly.2012.03.001

• Manganese(III) complexes
• Pyrazole ligands
• Magnetic properties
• Ligand design

Reacting Mn(ClO4)(2).6H(2)O and H(2)phpzEt (H(2)phpzEt = 5(3)-(2-hydroxypheny1)-3(5)-ethylpyrazole) in methanol in the presence of sodium hydroxide yields the compound [Mn-2(HphpzEt)(4)(H2O)(2)](ClO4)(2) (1). The pentanuclear [Mn-5(mu(3)-O)(2)(HphpzEt)(3)(PhpzEt)(3)(OCH3)(HOCH3)(2)(O2CPh)] (2) is obtained when performing a similar reaction with Mn(O2CPh)(2).2H(2)O. Compound 1 consists of a symmetric dinuclear manganese(III) cationic unit, [Mn-2(HphpzEt)(4)(H2O2](2+) with two non-coordinated perchlorate anions. Compound 2 is a rare pentanuclear complex containing all the manganese ions in the oxidation state III and it also has mu(3)-oxido ligands. Temperature- and field-dependent magnetization studies indicate dominant antiferromagnetic interactions between the manganese(III) ions in both compounds.

• 出版日期2012-5-11