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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bajwa, Somia E. Cheung, Man Sing Zhang, Xiangbiao Whitwood, Adrian C. Lin, Zhenyang Sehnal, Petr E. Fairlamb, Ian J. S. Jarvis, Amanda G. |
| Description | Author Affiliation: Jarvis AG ( Department of Chemistry, University of York, York, YO10 5DD, UK.) |
| Abstract | A multidentate and flexible diolefin–diphosphine ligand, based on the dibenzylidene acetone core, namely dbaphos (1), is reported herein. The ligand adopts an array of different geometries at Pt, Pd and Rh. At $Pt^{II}$ the dbaphos ligand forms cis- and trans-diphosphine complexes and can be defined as a wide-angle spanning ligand. $^{1}H NMR$ spectroscopic analysis shows that the β-hydrogen of one olefin moiety interacts with the $Pt^{II}$ centre (an anagostic interaction), which is supported by DFT calculations. At $Pd^{0}$ and $Rh^{I},$ the dbaphos ligand exhibits both olefin and phosphine interactions with the metal centres. The $Pd^{0}$ complex of dbaphos is dinuclear, with bridging diphosphines. The complex exhibits the coordination of one olefin moiety, which is in dynamic exchange (intramolecular) with the other “free” olefin. The $Pd^{0}$ complex of dbaphos reacts with iodobenzene to afford $trans-[Pd^{II}(dbaphos)I(Ph)].$ In the case of $Rh^{I},$ dbaphos coordinates to form a structure in which the phosphine and olefin moieties occupy both axial and equatorial sites, which stands in contrast to a related bidentate olefin, phosphine ligand (“Lei” ligand), in which the olefins occupy the equatorial sites and phosphines the axial sites, exclusively. |
| ISSN | 09476539 |
| e-ISSN | 15213765 |
| Journal | Chemistry - A European Journal |
| Issue Number | 19 |
| Volume Number | 19 |
| Language | English |
| Publisher | Wiley-VCH;ChemPubSoc Europe |
| Publisher Date | 2013-05-03 |
| Publisher Place | Germany |
| Access Restriction | Open |
| Subject Keyword | Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Catalysis |
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