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\begin{document}
\title{EMR of high-spin Mn(III) ions in porphyrinic complexes}
\author{\underline{Krzysztof Tadyszak}}
\affiliation{NanoBioMedical Centre, AMU Poznań, Poland}
\author{Czesław Rudowicz}
\affiliation{Faculty of Chemistry, AMU, Poznań, Poland}
\affiliation{Institute of Physics, West Pomeranian University of Technology Szczecin, Poland}
\author{Hitoshi Ohta}
\affiliation{Graduate School of Science, Kobe University, Nada, Kobe, Japan}
\affiliation{Center for Supports to Research and Education Activities, Kobe University, Japan}
\author{Takahiro~Sakurai}
\affiliation{Center for Supports to Research and Education Activities, Kobe University, Japan}
\begin{abstract}
We have have performed semiempirical modeling of the spin Hamiltonian (SH) parameters aimed at the elucidation of the intrinsic magnetic nature of high-spin (S = 2) manganese (III) 3d$^{4}$ ions at tetragonal symmetry sites in tetraphenyl - porphyrinato manganese (III) chloride (MnTPPCl) and related complexes. This modeling utilizes the microscopic spin Hamiltonians (MSH) approach developed for the 3d$^{4 }$ and 3d$^{6}$ ions with spin S = 2 at orthorhombic and tetragonal symmetry sites in crystals, which exhibit an orbital singlet ground state arising from the ground $^{5}$D multiplet. 

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\textit{We gratefully acknowledge the research grants from the Polish National Science Center: DEC-2012/04/M/ST3/00817 (CZR) and UMO-2016/21/D/ST3/00975 (KT).}
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\end{abstract}
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