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The Reactivity Studies of Chromium-Chromium Quintuple Bond Stabilized by Aminopyridinato Ligands

URN to cite this document: urn:nbn:de:bvb:703-epub-1693-9

Title data

Sobgwi Tamne, Emmanuel:
The Reactivity Studies of Chromium-Chromium Quintuple Bond Stabilized by Aminopyridinato Ligands.
Bayreuth , 2012 . - 62 P.
( Doctoral thesis, 2013 , University of Bayreuth, Faculty of Biology, Chemistry and Earth Sciences)

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Abstract

The reactivity of the quintuply bonded dichromium complex (1) stabilized by aminopyridinato ligands have been investigated. The reaction of 1 with alkynes and dienes leads to cycloaddition reactions. Furthermore, the reaction of 1 with O2 leads to the formation of dimeric CrV specie while, higher homologues of group 16 elements undergo addition reactions to give CrII species. For homodiatomic molecules of group 17, insertion of the quintuple bond into the corresponding X2 bond was observed (X = Cl, Br, I). The reaction of 1 with diphenyldisulfide or diphenyldiselenide shows the insertion of the Cr-Cr bond into the S-S or Se-Se bond and the formation of complexes in which the two Cr atoms are joined by two bridging PhS or PhSe groups. Moreover, the reaction of 1 with phosphines R2PX ligands is selective and leads to the formation of phosphide-bridged chromium complexes.

Abstract in another language

La réactivité du complexe (1) contenant la quintuple liaison Cr - Cr stabilisé par deux ligands aminopyridine a été étudié. 1 subit une reaction de cycloaddition avec des alcynes et des diènes. Par ailleurs, la réaction avec O2 conduit à la formation d’un dimère de CrV tandis que les homologues supérieurs du groupe 16 subissent des réactions d'addition avec 1 pour donner des composés de Cr(II). Pour les molécules homodiatomiques du groupe 17, on a observé l'insertion de la liaison quintuple dans la liaison X2 (X = Cl, Br, I) correspondante. La réaction de 1 avec du Ph2S2 ou le Ph2Se2 montre l'insertion de la liaison Cr-Cr dans la liaison S-S ou Se-Se et la formation de complexes dans lesquels les deux atomes de Cr forment un pont entre deux PhS ou deux PhSe. En outre, la réaction de 1 avec des ligands phosphines R2PX est sélective et conduit à la formation de complexes de chrome pontés.

Further data

Item Type: Doctoral thesis (No information)
Keywords: Chromium; quintuple bond; reactions; cycloaddition; cleavage; insertion; oxidative addition
DDC Subjects: 500 Science > 540 Chemistry
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II > Chair Inorganic Chemistry II - Univ.-Prof. Dr. Rhett Kempe
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-1693-9
Date Deposited: 25 Jun 2014 08:45
Last Modified: 25 Jun 2014 08:45
URI: https://epub.uni-bayreuth.de/id/eprint/1693

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