Jump to main content
Jump to site search

Issue 1, 2006
Previous Article Next Article

SPANphos: trans-spanning diphosphines as cis chelating ligands!

Author affiliations

Abstract

Several SPANphos ligands based on a spirobichroman backbone, introduced as a putative trans ligand, form compounds of the type [Rh(nbd)(SPANphos)]BF4 (1–6) in which both norbornadiene and SPANphos act as cis chelating ligands. The cyclooctadiene rhodium chloride derivatives form bimetallic complexes. Crystal structures for several of these compounds and free ligands are reported. Semiemperical AM1 and DFT calculations show that spirobichroman can assume several conformations, some of which are suitable for the formation of cis chelating SPANphos. All calculations on SPANphos complexes of PdCl2, PtCl2 and Rh(CO)Cl show that the trans complex is more stable by 4–10 kcal mol−1. The cis conformation in 1–6 is enforced by the cis chelating norbornadiene ligand.

Graphical abstract: SPANphos: trans-spanning diphosphines as cis chelating ligands!

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Sep 2005, accepted on 31 Oct 2005 and first published on 18 Nov 2005


Article type: Paper
DOI: 10.1039/B513870C
Dalton Trans., 2006, 268-278

  •   Request permissions

    SPANphos: trans-spanning diphosphines as cis chelating ligands!

    C. Jiménez-Rodríguez, F. X. Roca, C. Bo, J. Benet-Buchholz, E. C. Escudero-Adán, Z. Freixa and P. W. N. M. van Leeuwen, Dalton Trans., 2006, 268
    DOI: 10.1039/B513870C

Search articles by author

Spotlight

Advertisements