Syntheses, structures, and magnetic properties of cyano- and phenoxide-bridged Fe(III)-Mn(III) tetrameric assemblies formed by blocked fac-Fe tricyanide with aliphatic rings
- Authors
- Cho, Kyung Jin; Ryu, Dae Won; Lim, Kwang Soo; Lee, Woo Ram; Lee, Jin Wuk; Koh, Eui Kwan; Hong, Chang Seop
- Issue Date
- 2013
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- DALTON TRANSACTIONS, v.42, no.16, pp.5796 - 5804
- Indexed
- SCIE
SCOPUS
- Journal Title
- DALTON TRANSACTIONS
- Volume
- 42
- Number
- 16
- Start Page
- 5796
- End Page
- 5804
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/106488
- DOI
- 10.1039/c3dt32563f
- ISSN
- 1477-9226
- Abstract
- Three tetranuclear clusters [(Tp(Me,mt3))Fe(CN)(3)Mn(L)](2) (1, L = 5-Clacphmen; 2, L = 5-Clsalen; 3, L = 5-MeO-salen; Tp(Me,mt3) = hydrotris(3-methyl-4,5-propylene-5-methylpyrazol-1-yl)borate) were prepared by assembling the fac-Fe tricyanide with the corresponding Mn Schiff bases. The assembled molecules are linked by cyanide and phenoxide bridges. Weak pi-pi contacts between molecules are evident in these clusters. Compounds 1-3 exhibit slow relaxation of the magnetization. The phenoxide linkers mediate ferromagnetic coupling between the Mn centers, which is ascribed to the long axial Mn-O* length. The overall magnetic exchange coupling nature of the Fe-C N-Mn route is accounted for by the important structural parameters of bridging pathways such as Mn-N-cyano length, Mn-N-cyano-C-cyano angle, and C-eq-Fe center dot center dot center dot Mn-N-eq (eq = equatorial) torsion angle.
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