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 SM ISO690:2012SHOVA, Sergiu, KADELNIK, I., ZHOVMIR, F., BULGAK, I., BELSKII, Vitalii, TURTA, Constantin. Synthesis and study of a trinuclear complex of iron(III) with cyanoacetic acid. In: Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya, 1997, vol. 23, pp. 629-635. ISSN -. |
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  Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya |
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| Volumul 23 / 1997 / ISSN - /ISSNe 1070-3284 | ||||||
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| Pag. 629-635 | ||||||
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The hitherto unknown trinuclear iron(III)-cyanoacetic acid complex of the composition [Fe3O(CNCH2COO)6(H2O) 3]NO3·5H2O was studied by X-ray diffraction analysis. The crystals are orthorhombic and have the following unit cell parameters: a - 25.373(5), b - 15.148(3), c - 18.292(4) Å, Z=8, space group Pbca. The crystal structure is composed of the trinuclear [Fe3O(CNCH2COO)6(H2O) 3]+ cations, NO3- anions, and molecules of water of crystallization. The compound was studied by Mössbauer and IR spectroscopy, thermogravimetry, and magnetochemistry. The complex contains high-spin Fe3+ ions coupled to one another by an exchange interaction of the antiferromagnetic type. A comparative analysis of the Mössbauer parameters indicates that the electric field gradient in the vicinity of the Mössbauer nucleus depends on the nature of the R group in the RCH2 radical of the carboxylate ion |
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