Chemical Research in Chinese Universities ›› 1994, Vol. 10 ›› Issue (2): 63-67.

• Articles •     Next Articles

Synthesis and Magnetic Properties of Binuclear Mn(Ⅱ) Complexes with Alkoxide Bridge

Yan Shi-ping, Fan Bo, Liao Dai-zheng, Jiang Zong-hui, Wang Geng-lin   

  1. Department of Chemistry, Hankai University, Tianjin, 300071
  • Received:1993-09-08 Online:1994-04-24 Published:2011-08-17

Abstract: Five 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 (4300 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.

Key words: Manganese, complex, N-oxide, Schiff base, Magnetism