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New aryl phosphinite ligands avoiding ortho-metallation: Synthesis and molecular structures of trans-[PdCl2(PPh2OR)(2)] and trans-[Rh(CO)Cl(PPh2OR)(2)] (R=2,4,6-Me3C6H2; 2,6-Ph2C6H3)
Auteur(s)
Date de parution
2005
In
Inorganica Chimica Acta
Vol.
12
No
358
De la page
3417
A la page
3422
Mots-clés
Résumé
The new aryl phosphinites PPh2OR (R = 2,4,6-Me3C6H2, 1; R = 2,6-Ph2C6H3, 2) have been prepared from chlorodiphenylphosphine and the corresponding phenols. In these ligands, the ortho-positions of the aromatic phosphite function are blocked by methyl and phenyl substituents, which allows coordination to metal centres without ortho-metallation. Thus, reaction with [PdCl2(cod)] leads to the complexes trans-[PdCl2(PPh2OR)(2)] (R = 2,4,6-Me3C6H2, 3; R = 2,6-Ph2C6H3, 4), while the reaction with [Rh-2(CO)(4)Cl-2] gives trans-[Rh(CO)Cl(PPh2OR)(2)] (R = 2,4,6-Me3C6H2, 5; R = 2,6-Ph2C6H3, 6). The single-crystal X-ray structure analyses of 3 and 5 confirm the trans-coordination of the new ligands in these square-planar complexes. (c) 2005 Elsevier B.V. All rights reserved.
Identifiants
Type de publication
journal article
