Tricarbonylrhenium(I) and Manganese(I) Complexes of 2-(pyrazolyl)-4-toluidine

Authors

Brendan J Liddle, Marquette UniversityFollow
Sarath Wanniarachchi, Marquette UniversityFollow
Sergey V. Lindeman, Marquette UniversityFollow
James R. Gardinier, Marquette UniversityFollow

Document Type

Article

Language

eng

Format of Original

9 p.

Publication Date

1-1-2010

Publisher

Elsevier

Source Publication

Journal of Organometallic Chemistry

Source ISSN

0022-328X

Abstract

A series of tricarbonyl rhenium(I) and manganese(I) complexes of the electroactive 2-(pyrazolyl)-4-toluidine ligand, H(pzAn^Me), has been prepared and characterized including by single crystal X-ray diffraction studies. The reactions between H(pzAn^Me) and M(CO)₅Br afford fac-MBr(CO)₃[H(pzAn^Me)] (M = Mn, 1a; Re, 1b) complexes. The ionic species {fac-M(CH₃CN)(CO)₃[H(pzAn^Me)]}(PF₆) (M = Mn, 2a; Re, 2b) were prepared by metathesis of 1a or 1b with TlPF₆ in acetonitrile. Complexes 1a and 1b partly ionize to {M(CH₃CN)(CO)₃[H(pzAn^Me)]⁺}(Br⁻) in CH₃CN but retain their integrity in less donating solvents such as acetone or CH₂Cl₂. Each of the four metal complexes reacts with (NEt₄)(OH) in CH₃CN to give poorly-soluble crystalline [fac-M(CO)₃(μ-pzAn^Me)]₂ (M = Mn, 3a; Re, 3b). The solid state structures of 3a and 3b are of centrosymmetric dimeric species with bridging amido nitrogens and with pyrazolyls disposed trans- to the central planar M₂N₂ metallacycle. In stark contrast to the diphenylboryl derivatives, Ph₂B(pzAn^Me), none of the tricarbonyl group 7 metal complexes are luminescent.

Comments

Accepted version. Journal of Organometallic Chemistry, Vol. 695, No. 1 (January 1, 2010): 53-61. DOI. © 2010 Elsevier. Used with permission.

Recommended Citation

Liddle, Brendan J; Wanniarachchi, Sarath; Lindeman, Sergey V.; and Gardinier, James R., "Tricarbonylrhenium(I) and Manganese(I) Complexes of 2-(pyrazolyl)-4-toluidine" (2010). Chemistry Faculty Research and Publications. 547.
https://epublications.marquette.edu/chem_fac/547