Pyrazoles and imidazoles as ligands. X. electron paramagnetic resonance spectra of MnII in a tetragonal environment of four pyrazoles and two anions

R.D. Dowsing, B. Nieuwenhuijse, J. Reedijk

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Abstract

Electron Paramagnetic Resonance Spectra have been recorded for some compounds of the type Mn(ligand)4- (anion)2, with pyrazole and 3(5)-methyl pyrazole as the ligands, and Cl−, Br−, I−, and NO3−, as the anions. The spectra show absorptions far from geff=2 for all compounds at both X- and Q-band frequencies. these spectra can be interpreted on the basis of a slightly distorted D4h symmetry for S=5/2, with D= 0.05–1.5 cm−1 and λ (being equal to E/D)=0.01–0.1 The different values of the parameters for the several compounds can be explained by differences in the axial ligand-field strengths.
Original languageEnglish
Pages (from-to)301-304
JournalInorganica chimica acta
Volume5
DOIs
Publication statusPublished - 1971
Externally publishedYes

Keywords

  • IR-68112

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