Quantitative Chirality Analysis of Molecular Subunits of Bis(oxazoline)copper(II) Complexes in Relation to Their Enantioselective Catalytic Activity
- 5 December 2003
- journal article
- Published by Wiley in Chemistry – A European Journal
- Vol. 9 (23) , 5832-5837
- https://doi.org/10.1002/chem.200305035
Abstract
The analysis of the quantitative chirality of molecular subunits of spirocyclic bisoxazoline copper complexes was carried out in order to identify the molecular portions most responsible for the chirality of the whole molecule, and therefore also for its catalytic enantioselectivity. It is shown that the smallest fragment that carries the information on molecular chirality contains only a portion of the bidentate bisoxazoline ligands and most atoms of the two monodentate ligands. The structural parameters that are best correlated to the chirality measures of the studied systems are the bond angles at the bridgehead spiro‐carbon atom. A prediction is made for an analogous catalyst with potentially high enatioselectivity. Una anàlisi quantitativa de la quiralitat de fragments moleculars en complexos de coure amb bisoxazolines espirocícliques s'ha portat a terme amb L'objectiu d'identificar quins d'aquests fragments són responsables de la quiralitat de la molècula en conjunt i, al capdavall, de la seva enantioselectivitat catalítica. Es mostra que el fragment més petit que emmagatzema la informació sobre la quiralitat molecular conté tan sols una porció dels lligands bisoxazolina i la major part dels àtoms dels dos lligands monodentats. Els paràmetres estructurals que es correlacionen millor amb les mesures de quiralitat dels sistemes estudiats són els angles d'enllaç a L'átom de carboni espirànic. Es fa una predicció d'un nou catalitzador d'aquesta família que hauria de tenir una enantioselectivitat molt elevada.Keywords
This publication has 16 references indexed in Scilit:
- Relationships between Temperature, Magnetic Moment, and Continuous Symmetry Measures in Spin Crossover ComplexesJournal of the American Chemical Society, 2003
- Theoretical Evidence of Persistent Chirality in D3 Homoleptic Hexacoordinate Complexes with Monodentate LigandsChemistry – A European Journal, 2003
- Continuous chirality measures of tetracoordinate bis(chelate) metal complexesDalton Transactions, 2003
- Quantitative Chirality Measures Applied to Domain Formation in Langmuir MonolayersLangmuir, 2002
- Switching “On” and “Off” the Expression of Chirality in Peptide RotaxanesJournal of the American Chemical Society, 2002
- Ligand distortion modes leading to increased chirality content of Katsuki‐Jacobsen catalystsChirality, 2002
- C2-Symmetric Cu(II) Complexes as Chiral Lewis Acids. Catalytic Enantioselective Michael Addition of Silylketene Acetals to Alkylidene MalonatesJournal of the American Chemical Society, 1999
- The bite angle makes the difference: a practical ligand parameter for diphosphine ligandsJ. Chem. Soc., Dalton Trans., 1999
- Continuous Symmetry Measures. 4. ChiralityJournal of the American Chemical Society, 1995
- Continuous symmetry measures. 2. Symmetry groups and the tetrahedronJournal of the American Chemical Society, 1993