Structures and magnetism of two manganese crowns assembled with 2,4-dihydroxyacetophenone oxime.

LI, LEI-LEI; WANG, SU-NA; LU, JING; CAO, FAN; KONG, LING-QIAN; DOU, JIAN-MIN; LI, DA-CHENG

Reactions of 2,4-dihydroxyacetophenone oxime with manganese salts yielded two manganese crowns, [Mn3(μ3-O)(4-OH-Me-sao)3(HCOO)(MeOH)5]·MeOH (1) and [Mn3(μ3-O)(4-OH-Me-sao)3(CH3COO)(MeOH)5]·MeOH (2) (4-OH-Me-saoH2=2,4-dihydroxyacetophenone oxime). Both compounds possess [MnIII3(μ3-O)]7 cores which contain 9-MC-3 metallacrown (MC) rings with the repeating pattern [–Mn–N–O–]. However, the difference in the structures of both compounds is coordinated carboxylates. In1and2, the MC molecules are connected with each other through intermolecular hydrogen bonds, generating similar 3-D supramolecular networks. Magnetic properties reveal that in1and2the metal ions exhibit ferromagnetic exchange coupling.

MOLECULAR structure; MAGNETISM; MANGANESE; MOLECULAR self-assembly; ACETOPHENONE; OXIMES; CHEMICAL reactions

Journal of Coordination Chemistry, 2013, Vol 66, Issue 2, p306

0095-8972

Academic Journal

10.1080/00958972.2012.756103