Reversible cooperative dihydrogen binding and transfer with a bis-phosphenium complex of chromium

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http://hdl.handle.net/10138/319820

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Birchall , N , Feil , C M , Gediga , M , Nieger , M & Gudat , D 2020 , ' Reversible cooperative dihydrogen binding and transfer with a bis-phosphenium complex of chromium ' , Chemical Science , vol. 11 , no. 35 , pp. 9571-9576 . https://doi.org/10.1039/d0sc03773g

Title: Reversible cooperative dihydrogen binding and transfer with a bis-phosphenium complex of chromium
Author: Birchall, Nicholas; Feil, Christoph M.; Gediga, Michael; Nieger, Martin; Gudat, Dietrich
Contributor: University of Helsinki, Department of Chemistry
Date: 2020-09-21
Language: eng
Number of pages: 6
Belongs to series: Chemical Science
ISSN: 2041-6520
URI: http://hdl.handle.net/10138/319820
Abstract: The reversible reaction of H(2)with a bis-phosphenium complex of chromium provides a rare example of 3d transition metal/phosphenium cooperativity. Photolysis induces the activation of H(2)and yields a spectroscopically detectable phosphenium-stabilized (sigma-H-2)-complex, readily showing exchange with gaseous H(2)and D-2. Further reaction of this complex affords a phosphine-functionalized metal hydride, representing a unique example of reversible H(2)cleavage across a 3d MP bond. The same species is also accessibleviastepwise H+/H(-)transfer to the bis-phosphenium complex, and releases H(2)upon heating or irradiation. Dihydrogen transfer from the H-2-complex to styrene is exploited to demonstrate the first example of promoting hydrogenation with a phosphenium complex.
Subject: N-HETEROCYCLIC PHOSPHENIUM
MOLECULAR-HYDROGEN COMPLEXES
PHOSPHIDO COMPLEXES
BOND ACTIVATION
REACTIVITY
LIGANDS
GENERATION
CARBON
H-2
116 Chemical sciences
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