Unusual coordination mode for 1,3-diphosphete ligands towards a Cr-Cr quintuple bond complex

The reaction of LCr 5&cmb.b.line; CrL (L = N 2 C 25 H 29 , 1) with the phosphaalkynes R-C≡P (R = t Bu, Me, Ad) yields the neutral dimerisation compounds [L 2 Cr 2 (μ,η 1 :η 1 :η 2 :η 2 -P 2 C 2 R 2 )] (R = t Bu (2), Me (3)) and the tetrahedrane complex [L 2 Cr 2 (μ,η 2 :η 2 -P&z.dbd;CAd)] (4...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2023-07, Vol.59 (55), p.8588-8591
Main Authors: Elsayed Moussa, M, Rummel, E.-M, Balázs, G, Riesinger, C, Noor, A, Kempe, R, Scheer, M
Format: Article
Language:English
Subjects:
Coordination
Ligands
Phosphaalkynes
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Summary:The reaction of LCr 5&cmb.b.line; CrL (L = N 2 C 25 H 29 , 1) with the phosphaalkynes R-C≡P (R = t Bu, Me, Ad) yields the neutral dimerisation compounds [L 2 Cr 2 (μ,η 1 :η 1 :η 2 :η 2 -P 2 C 2 R 2 )] (R = t Bu (2), Me (3)) and the tetrahedrane complex [L 2 Cr 2 (μ,η 2 :η 2 -P&z.dbd;CAd)] (4). The 1,3-diphosphete ligands in complexes 2 and 3 are the first to possess this structural feature spanned over a metal-metal multiple bond, while the slightly bigger adamantyl phosphaalkyne remains a monomer in 4 with a side-on coordination mode. The reaction of the phosphaalkynes RC&z.tbd;P (R = t Bu, Me) with a Cr-Cr quintuple bond complex leads to 1,3-diphosphete ligands with an unprecedented coordination mode. When AdC&z.tbd;P is used instead, a side-on coordination of the phosphaalkyne is realised.
ISSN:1359-7345
1364-548X
DOI:10.1039/d3cc01358h