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This article in SSSAJ

  1. Vol. 49 No. 5, p. 1169-1172
    Received: Feb 11, 1983
    Accepted: Feb 12, 1985

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Electron Paramagnetic Resonance of Manganese (II) in Newly Humified Clover Leaves1

  1. H. A. Sonbol and
  2. M. Baverez2



Clover leaves (Trifolium alexandrium L.) were humified by incubation at 30°C for 60 d. Electron paramagnetic resonance (EPR) and infrared (IR) spectra were recorded during that time. The EPR spectra of the leaves exhibited a hyperfine structure characteristic of Mn(II). The theory of the EPR experiment was discussed and the parameters of the spin Hamiltonian were determined. The A and D values of −265 and 150 Mc s−1 respectively, indicated that Mn(II) was coordinated by six oxygen-containing functional group ligands in an appreciably distorted octahedron environment.

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