Structure and magnetic ordering of a 2-D Mn~Ⅱ(TCNE)I(OH_2) (TCNE = tetracyanoethylene) organic-based magnet (T_c = 171 K)

摘要

Mn~Ⅱ(TCNE)I(OH_2) was isolated from the reaction of tetracyanoethylene (TCNE) and MnI_2(THF)_3, and has a 2-D structure possessing an unusual, asymmetric bonded μ4-[TCNE]-. Direct antiferromagnetic coupling between the S = 5/2 Mn~Ⅱ and S = 1/2 [TCNE]*- leads to magnetic ordering as a canted antiferrimagnet at a T_c of 171 K.