Brunner, Henri and Dormeier, Stephan and Grau, Ilias and Zabel, Manfred (2002) Dinuclear and trinuclear Ni-, Pd-, and Pt-halide complexes of the easily accessible chiral ligand P,P,P,-tris[(+)-9-phenyldeltacyclan-8-yl]-1,2bis(phosphanyl)benzene. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (10). pp. 2603-2613. ISSN 1434-1948
Full text not available from this repository.Abstract
The synthesis of seven dinuclear complexes [(+)(delta)-LMHal](2) (M = Ni, Pd, Pt; Hal = Cl, Br, I) is described, in which (+)(delta)-L(-)represents the deprotonated chiral chelate ligand P,P,P'-tris[(+)-9-phenyldeltacyclan-8-yl]- 1,2-bis(phosphanyl)benzene, easily accessible in a highly enantioselective homo-Diels-Alder reaction. All the dinuclear complexes are bent at the phosphido bridges which connect the two square-planar halves of the molecules. The phosphorus atoms of the phosphido bridges are stereogenic centers. For [(+)(delta)-LNiBr](2) and [(+)(delta)-LPdCl](2) buth diastercomers with (SpSp) and (RpRp) configuration were observed, whereas for [(+)(delta)-LPdBr](2), [(+)(delta)-LPdI](2), and [(+)(delta)-LPtCl](2) only the (S-p,S-p) isomers could be obtained. Furthermore, the synthesis of eight trinuclear complexes [(+)(delta)-L(2)M(3)Hal(4)] (M = Pd, Pt; Hal = Cl, Br) is reported, which contain unusual three-square arrays. In the trinuclear complexes all the halogens are oriented to one side. Halogeno and phosphido bridges connect the three squares leading to chair configurations (opposite scaffold chirality possible) and boat configurations. For [(+)(delta)-L2Pd3Cl4], [(+)(delta)-(LPdBr4)-Pd-2-Br-3], and [(+)(delta)-L2Pt3Cl4] the two diastereomers with (S-p,S-p) and (RpRp) configuration and for [(+)(delta)-L2Pt3Br4] the diastereomers with (SpSp) and (SpRp) configuration could be isolated. In addition, the dinuclear complex [(+)(delta)-Lpt(2)Br(3)(cod)] (cod = 1,5-cyclooctadiene) containing a single phosphido bridge was obtained. ((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PALLADIUM(II) COMPLEXES; CATALYSIS; nickel complexes; palladium complexes; platinum complexes; phosphido bridges; phosphorus configuration |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Henri Brunner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Aug 2021 06:41 |
| Last Modified: | 27 Aug 2021 06:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39814 |
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