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Issue 20, 2015
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Geometric and electronic structures of five-coordinate manganese(II) “picket fence” porphyrin complexes

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Abstract

Three five-coordinate, high spin manganese(II) “picket fence” porphyrin complexes, [Mn(TpivPP)(L)] (TpivPP = α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinato; L = 1-MeIm (1-methylimidazole), 1-EtIm (1-ethylimidazole) and 2-MeHIm (2-methylimidazole)), are synthesized and studied by single-crystal X-ray, UV-vis and electronic paramagnetic resonance (EPR) spectroscopy. Structural parameters are investigated and compared with analogues. Low temperature (90 K), high field EPR studies of [Mn(TpivPP)(1-MeIm)] and [Mn(TpivPP)(2-MeHIm)] showed five resonances including characteristic signals at ∼5.9 and ∼2.0. The simulations of the EPR spectra give the zero field splitting (zfs) parameters (D, E and λ) and the hyperfine coupling constant (A).

Graphical abstract: Geometric and electronic structures of five-coordinate manganese(ii) “picket fence” porphyrin complexes

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Publication details

The article was received on 16 Feb 2015, accepted on 09 Apr 2015 and first published on 13 Apr 2015


Article type: Paper
DOI: 10.1039/C5DT00685F
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Dalton Trans., 2015,44, 9382-9390

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    Geometric and electronic structures of five-coordinate manganese(II) “picket fence” porphyrin complexes

    Q. Yu, Y. Liu, D. Liu and J. Li, Dalton Trans., 2015, 44, 9382
    DOI: 10.1039/C5DT00685F

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