Abstract
Cobalt(II) complexes of 9, 10-phenanthrenedionedioxime (pqdH2) and benzoquinonedioxime (bqdH2) and the doped sample, Co(pqdH)2/Ni(pqdH)2 were prepared and investigated by EPR. The EPR parameters, especially the small hyperfine splitting values, reveal the presence of oxygen adduct in the concentrated (undoped) samples, while the dilute (doped) sample has parameters corresponding to a2A1(¦z2>) ground state. It is proposed that the oxygen adducts are formed as intermediates, leading ultimately to thetris-chelate Co(III) complexes of these oximes, which however could not be isolated in pure form.
Similar content being viewed by others
References
Basset R C J, Denney R C, Jeffery G H and Mendham J (eds) 1982Vogel’s textbook of quantitative inorganic analysis (London: ELBS and Longman) pp. 461
Baumgarten M, Lubitz W and Winscom C J 1987Chem. Phys. Lett. 133 102
Biskupic S and Valko L 1975J. Mol. Struct. 27 97
Boyer J H and Ellzey S E Jr 1960J. Am. Chem. Soc. 82 2525
Chacko V P and Manoharan P T1974J. Magn. Reson. 16 75
Daul C, Schlapfer C W and Zelewsky A V 1979Struct. Bonding 36 129
Greenwood N N and Earnshaw A 1984Chemistry of the elements (Oxford: Pergamon) p. 1302
Gupta B D, Kumar M and Roy S 1989Inorg. Chem. 28 11
Herron N 1986Inorg. Chem. 25 4714
Hitchman M A 1977Inorg. Chem. 16 1985
Jones R D, Summerville D A and Basolo F 1979Chem. Rev. 79 139
Jorin E, Schweiger A and Gunthard Hs H 1979Chem. Phys. Lett. 61 228
Kamachi M, Shibasaka M, Kajiwara A, Mori W and Kishita M 1989Bull. Chem. Soc. Jpn. 62 2465
Kanzing W and Cohen M H 1959Phys. Rev. Lett. 3 509
Lopez C, Alverez S, Solans X and Font-Altaba M 1986Inorg. Chim. Acta 111 L19
Lubitz W, Winscom C J, Diegruber H and Moseler R 1987 (unpublished results) (quoted in Baumgartenet al 1987)
McGarvey B R 1975Can. J. Chem. 53 2498
Murray K S, van den Bergen A, Kennedy B J and West B O 1986Aust. J. Chem. 39 1479
Rajasekharan M V and Manoharan P T 1981Mol. Phys. 44 1145
Rockenbauer A, Zahonyi E D and Simandi L 11975J. Chem. Soc., Dalton Trans. 1729
Schmidt J and Soll J 1907Berichte 40 2456
Smith T D and Pilbrow J R 1981Coord. Chem. Rev. 39 295.
Swarnabala G and Rajasekharan M V 1989Inorg. Chem. 28 662
Walter C 1936Gazz. Chim. Ital. 66 595
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Venkatalakshmi, N., Rajasekharan, M.V. EPR of the Co(II) complexes of phenanthraquinonedioxime and benzoquinonedioxime. Formation of dioxygen adducts in the solid state. Proc. Indian Acad. Sci. (Chem. Sci.) 107, 327–333 (1995). https://doi.org/10.1007/BF02840788
Issue Date:
DOI: https://doi.org/10.1007/BF02840788