Specific Features of Monomeric Octahedral Monooxo d 2-Rhenium(V) Complexes with Oxygen Atoms of Tridentate Chelating (О, N, N) Ligands (Review)

Specific features of the structures of 35 mononuclear octahedral monooxo d2-Re(V) complexes with tridentate chelating (О, N, N) ligands [ReO(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{L}}_{{{\text{tri}}}}^{m}$$\end{document})(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{L}}_{{{\text{bi}}}}^{n}$$\end{document})], [ReO(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{L}}_{{{\text{tri}}}}^{m}$$\end{document})(Hal)2], and [ReO(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{L}}_{{{\text{tri}}}}^{m}$$\end{document})Cl(PPh3)] have been considered. It has been demonstrated that, in most of compounds, the Re–O(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{L}}_{{{\text{tri}}}}^{m}$$\end{document})trans bonds are comparable in length (or somewhat shorter than) with the Re–O(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{L}}_{{{\text{tri}}}}^{m}$$\end{document})cis or Re–O(ST) bonds. This is evidence that the structure contains pseudodioxo ReO2 groups with an increased multiplicity of both Re–O bonds trans to each other. In the structures of eight compounds, the Re–O(Ltri)trans bonds are noticeably longer than Re–O(ST) and Re–O(Ltri)cis owing to the structural manifestation of the trans influence of a multiply bonded oxo ligand.