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Inorganics 2017, 5(1), 8;

Manganese(I)-Based CORMs with 5-Substituted 3-(2-Pyridyl)Pyrazole Ligands

Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743 Jena, Germany
Author to whom correspondence should be addressed.
Academic Editor: Lígia M. Saraiva
Received: 19 December 2016 / Revised: 10 January 2017 / Accepted: 19 January 2017 / Published: 25 January 2017
(This article belongs to the Special Issue CO-Releasing Molecules)
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The reaction of [(OC)5MnBr] with substituted 3-(2-pyridyl)pyrazoles) 2-PyPzRH (1a-l) in methanol or diethyl ether yields the yellow to orange manganese(I) complexes [(OC)3Mn(Br)(2-PyPzRH)] (2a-l), the substituents R being phenyl (a), 1-naphthyl (b), 2-anthracenyl (c), 1-pyrenyl (d), 4-bromophenyl (e), 3-bromophenyl (f), duryl (g), 2-pyridyl (h), 2-furanyl (i), 2-thienyl (j), ferrocenyl (k), and 1-adamantyl (l). The carbonyl ligands are arranged facially, leading to three chemically different CO ligands due to different trans-positioned Lewis donors. The diversity of the substituent R demonstrates that this photoCORM backbone can easily be varied with a negligible influence on the central (OC)3MnBr fragment, because the structural parameters and the spectroscopic data of this unit are very similar for all these derivatives. Even the ferrocenyl complex 2k shows a redox potential for the ferrocenyl subunit which is identical to the value of the free 5-ferrocenyl-3-(2-pyridyl)pyrazole (1k). The ease of variation of the starting 5-substituted 3-(2-pyridyl)pyrazoles) offers a modular system to attach diverse substituents at the periphery of the photoCORM complex. View Full-Text
Keywords: CORMs; photoCORMs; manganese carbonyls; pyridylpyrazoles; manganese pyrazolates CORMs; photoCORMs; manganese carbonyls; pyridylpyrazoles; manganese pyrazolates

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Mede, R.; Gläser, S.; Suchland, B.; Schowtka, B.; Mandel, M.; Görls, H.; Krieck, S.; Schiller, A.; Westerhausen, M. Manganese(I)-Based CORMs with 5-Substituted 3-(2-Pyridyl)Pyrazole Ligands. Inorganics 2017, 5, 8.

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