摘要
ive binuclear Mn( Ⅱ ) complexes were synthesized, namely [Mn2LCl]Cl2 .H2O (1) , [Mn2LphCOO] (ClO4 )2 (2) , [Mn2LOH] (ClO4 )2 · C2H5OH (3 ) ,[Mn2LC2H5O](ClO4)2 ·H2O (4) , and [Mn2L(SCN)3] ·2C2H5OH (5) , where HLis 1 : 2 Schiff bases derived from 1 , 3- diaminopropan-2-ol and picolinaldehyde N- ox-ide. Based on the IR, elemental analyses and conductivity measurement, these com- plexes are proposed to have an endogenous bridge (alkoxide) and an exogenousbridge (it can be an anion). The complexes (3) and (4) were characterized by vari-able temperature magnetic susceptibility (4 300 K) and the data were fitted by theleast-squares to a susceptibility equation derived from the spin Hamiltonian, H =- 2J · S1 · S2. The exchange integral J, was found to be 1. 19 cm-1 for (3) and 1. 06 cm-1 for (4) , indicating that a weak antiferromagnetic exchange is presentin the binuclear Mn( Ⅱ ) complexes.
ive binuclear Mn( Ⅱ ) complexes were synthesized, namely [Mn2LCl]Cl2 .H2O (1) , [Mn2LphCOO] (ClO4 )2 (2) , [Mn2LOH] (ClO4 )2 · C2H5OH (3 ) ,[Mn2LC2H5O](ClO4)2 ·H2O (4) , and [Mn2L(SCN)3] ·2C2H5OH (5) , where HLis 1 : 2 Schiff bases derived from 1 , 3- diaminopropan-2-ol and picolinaldehyde N- ox-ide. Based on the IR, elemental analyses and conductivity measurement, these com- plexes are proposed to have an endogenous bridge (alkoxide) and an exogenousbridge (it can be an anion). The complexes (3) and (4) were characterized by vari-able temperature magnetic susceptibility (4 300 K) and the data were fitted by theleast-squares to a susceptibility equation derived from the spin Hamiltonian, H =- 2J · S1 · S2. The exchange integral J, was found to be 1. 19 cm-1 for (3) and 1. 06 cm-1 for (4) , indicating that a weak antiferromagnetic exchange is presentin the binuclear Mn( Ⅱ ) complexes.
