Journal
NEW JOURNAL OF CHEMISTRY
Volume 33, Issue 4, Pages 847-852Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b818578f
Keywords
-
Categories
Funding
- Indian National Science Academy
- CSIR, India
Ask authors/readers for more resources
The synthesis, structural characterization, spectroscopic, magnetic, electrochemical and thermal properties of a methoxo-bridged dinuclear iron(III) inclusion compound [Fe-2(m-xba)(2)(mu-OCH3)(2)]center dot CH2Cl2 (1) derived from m-xylylenebis(acetylacetone) H-2(m-xba) are reported. In 1, the symmetry related two distorted octahedral iron(III) centres are separated by 3.164(8) angstrom and the distance between the centroids of the aromatic ring planes is 11.836 angstrom. In the solid state molecular association takes place through C-H center dot center dot center dot O and C-H center dot center dot center dot Cl types of hydrogen bondings leading to the remarkable thermal stability of 1 whose desolvation takes place between 140 and 220 degrees C. The enthalpy change due to the loss of dichloromethane, as determined by differential scanning calorimetric measurement, is -103 kJ mol(-1). Variable-temperature (4-300 K) magnetic susceptibility measurements indicated antiferromagnetic exchange interaction (H = -2JS(1)S(2)) in 1 with J = -13.5 cm(-1). The H-1 NMR spectrum of 1 in CD2Cl2 is consistent with its symmetric structure and exhibits maximum paramagnetic shift for the methoxy protons (ca. 200 ppm). The cyclic voltammogram of 1 in dichloromethane in the potential range 0 to -1.2 V exhibits a quasi-reversible redox couple due to (FeFeIII)-Fe-III/(FeFeII)-Fe-III with E-1/2 = -0.85 V. Further reduction to the (FeFeII)-Fe-II state at -1.5 V leads to decomposition of the complex species.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available