Keywords
thermal stability
magnetic properties of Mn(II)
Co(II)
Ni(II)
Cu(II)
How to Cite
Abstract
The complexes of 2-methoxyhenoxyacetates of Mn(II), Co(II), Ni(II) and Cu(II)with the general formula: M(C9H9O4)3·4H2O, where M(II) = Mn, Co, Ni and Cu have been synthesized and characterized by elemental analysis, IR spectroscopy, magnetic and thermogravimetric studies and also X-ray diffraction measurements. The complexes have colours typical for M(II) ions (Mn(II) - a pale pink, Co(II) - pink, Ni(II) - green, and Cu(II) – blue). The carboxylate group binds as monodentate and bidentate ligands. On heating to 1273K in air the complexes decompose in the same way. At first, they dehydrate in one step to anhydrous salts, that next decompose to the oxides of respective metals with the intermediate formation of the oxycarbonates. Their solubility in water at 293K is of the order of 10-5 mol·dm-3. The magnetic moments of analysed complexes were determined in the range of 76-303K. The results reveal them to be high-spin complexes of weak ligand fields.
References
W. Ferenc, M. Bernat, J. Sarzyński, and B.Paszkowska, Ecl. Quim., São Paolo, 33 (1) (2008)7.
S.C. Mojumdar, D. Hudecova and M. Melnik, Pol. J. Chem. 73 (1999)759
M. McCann, J,F. Cronin and M. Devereux, Polyhedron, 17(1955)2379
C.N. Rao, S. Natarajan, Angew, Chem. Int. Ed., 43(2004)1446
E.V. Dikarev, R.G. Gray, B. Li, Angew. Chem. Int. Ed., 44(2005) 1721
J. Sokolik, I. Tumova, J. Valentova, E. Misikova, P. Svec, Act. Fac. Pharm. Univ. Com. T LIV (2007) 165-170
B.N. Figgs, R.S. Nyholm, J. Chem. Soc. (1958) 4190
E. König, Magnetic Properties of Coordination and Organometallic Transition Metal Compounds., Springer Verlag, Berlin. 1966
A. Bartecki, Electronic Spectra of Complex Compounds, Scientific and Technical Publishers, Warsaw, 1987
A.E. Orgel, An Introduction to Transition – Metal Chemistry, Ligand-Field Theory. John Wiley and Sons, New York, 1960
L.J. Bellamy, The Infrared Spectra of Complex Molecules, Chapman L. Hall Ltd, London. 1975
K. Nakamoto, Infrared and Raman Spectra of Inorganic and Coordination Compounds, John Wiley and Sons, Toronto, 1997
A. Cross, A.R. Jones, An Introduction to Practical Infrared Spectroscopy. Butterworths, London, 1969
R.C. Mehrotra, R. Bohra, Metal Carboxylates, Academic Press, London. 1983
K. Burger, Coordination Chemistry: Experimental Methods, Akademiai Kiado, Budapest, 1973
M. Mikami, I. Nakagawa, T. Simanouchi, Spectrochim. Acta, 23A (1967)1037
Y. Kim, K. Machida, Spectrochim. Acta. 42A(1986)881
K. Nakamoto, E. Udovich, J. Takemoto, J.Am. Chem. Soc., 92 (1970) 3973
M.F. Richardson, W.F. Wagner, D.E. Sands, Inorg. Chem., 7(1968)2495
A.K. Bridson, Inorganic Spectroscopic Metods, Oxford University Press, New York, 1988
L.M. Harwood, T.D. Claridge, Introduction to Organic Spectroscopy, Oxford University Press, New York, 1999
B.S. Manhas, A.K. Trikha, J. Indian. Chem. Soc. 59(1982)315
E. Łągiewka, Z. Bojarski, X-Ray Structural Analysis, Polish Sientific Publisher, Warsaw, 1988
A.V. Nikolaev, A.V. Logvinienko, L.J. Myachina, L.J. Thermal Analysis Vol. 2. Academic Press, New York, 1989
B. Singh, B.V. Agarwala, P.L. Mourya, A.K. Dey, J. Indian Chem. Soc. 59 (1992)1130
L.A. Kazicyna, N.B. Kupletska, Spectroscopic Methods of the Structure Determination of Organic Compounds, PWN, Warsaw, 1976
J.D. Roberts, M.C. Caserio, Organic Chemistry, PWN, Warsaw, 1969
F. Paulik, Speciel Trends in Thermal Analysis, Wiley Chichester, 1995
J. Mroziński, M. Janik, T. Nowakowski, Scientic Numbers of Silesian Technical University, 119(1988)125
A. Earnshaw, Introduction to Magnetochemistry, Academic Press, London, 1956
E. O’Connor, Progress in Inorganic Chemistry, Wiley, New York, 1982
F.A. Kettle, Inorganic Physical Chemistry, Polish Scientific Publisher, Warsaw, 1999
J. Mrozinski, Materials Science, Vol XIV (1988)3
M. Hvastijova, M. Kochout, J. Mrozinski, J.Jäger, Polish J. Chem. 69(1995)852
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