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EPR Spectral Studies of Manganese(I) Based Molecular Squares

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Abstract

Manganese(I) based molecular squares of type [Mn(CO)3Br(μ-L)]4 where L = pyrazine, 4,4′-bipyridine, trans-1,2-bis(4-pyridyl)ethylene were synthesized and studied in detail by EPR spectroscopy. The continuous wave electron paramagnetic resonance (CW EPR) spectrum of these compounds consists of a broad transition at g = 2.006 and 4.16 that corresponds to an interacting low spin Mn(II) center and a narrow transition at g = 2.004 that corresponds to a nitrogen center radical. These results are discussed in detail and the observation of these characteristic EPR spectral signals is attributed to a partial transfer of an electron from Mn(I) center to the nitrogenous ligand through MLCT.

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  • 28 November 2020

    The article was revised due to change in author name.

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Author notes

  1. S. Karthikeyan

    Present address: Department of Science and Humanities, University VOC College of Engineering, Thoothukudi, 628 008, India

Authors and Affiliations

  1. Department of Chemistry, Pondicherry University, Kalapet, Puducherry, 605 014, India

    S. Karthikeyan & Bala. Manimaran

  2. Department of Applied Sciences, National Institute of Technology Goa, Ponda, Goa, 403 401, India

    Velavan Kathirvelu

Authors
  1. S. Karthikeyan
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  2. Bala. Manimaran
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  3. Velavan Kathirvelu
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Correspondence to Velavan Kathirvelu.

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Karthikeyan, S., Manimaran, B. & Kathirvelu, V. EPR Spectral Studies of Manganese(I) Based Molecular Squares. Appl Magn Reson 52, 919–926 (2021). https://doi.org/10.1007/s00723-020-01300-3

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