Out-of-plane Dimer Structures and Magnetic Properties of Mn(III) Quadridentate Schiff Base Compounds with N , N ′-(1, 1, 2, 2-Tetramethylethylene)bis(5-chlorosalicylideneiminato)

Abstract

Three Mn(III) quadridentate Schiff base compounds with N , N '-(1, 1, 2, 2-tetramethylethylene)bis(5-chlorosalicylideneiminato) (5-Clsaltmen 2 m ) were prepared and characterized: [Mn 2 (5-Clsaltmen) 2 (H 2 O) 2 ](ClO 4 ) 2 ( 1 ), [Mn 2 (5-Clsaltmen) 2 (5-Clsal) 2 ](ClO 4 ) 2 ( 2 ; 5-Clsal=5-chlorosalicylaldehydonato), and [NEt 4 ] 2 [Mn 2 (5-Clsaltmen) 2 (MeOH) 2 ][Fe(CN) 6 ]ClO 4 2MeOH ( 3 . All compounds contain Mn(III) out-of-plane dimer units. The magnetic measurements revealed intra-dimer ferromagnetic exchange interaction between Mn(III) ions via phenolate oxygen, producing a S =4 spin ground state. Mn(III) quadridentate Schiff base compounds out-of-plane dimers ferromagnetic interaction S =4 spin ground state