Synthesis and characterization of transition metal carbonyl clusters with chiral ligands and their application in asymmetric catalysis
(2010) KEMZ02 20091Chemical Physics
- Abstract
- Triruthenium dodecacarbonyl was reacted with the non chiral ligand PSSP as well as chiral ferrocenyl diphosphines of the Josiphos (J008, J006 and J015) and Walphos (W009) families to give [Ru3(CO)10(µ-1,2-P-P)], (P-P = W009 1, J008 2, J006 3, J015 4 and PSSP 5. The X-ray structure of 3 shows that a Ru-Ru edge is bridged by a diphosphine ligand in an equatorial coordination mode. The corresponding clusters with the ligand in a chelating coordination mode were also obtained as minor products. The tetraruthenium cluster [H2Ru4(CO)13] was reacted with chiral diphosphine ligands of the Josiphos family (J007 and J015). Four products were isolated: [H2Ru4(CO)11(µ-1,2-J007)] 6 and [H2Ru4(CO)11(µ-1,2-J015)] 7, in which the diphosphine coordinates... (More)
- Triruthenium dodecacarbonyl was reacted with the non chiral ligand PSSP as well as chiral ferrocenyl diphosphines of the Josiphos (J008, J006 and J015) and Walphos (W009) families to give [Ru3(CO)10(µ-1,2-P-P)], (P-P = W009 1, J008 2, J006 3, J015 4 and PSSP 5. The X-ray structure of 3 shows that a Ru-Ru edge is bridged by a diphosphine ligand in an equatorial coordination mode. The corresponding clusters with the ligand in a chelating coordination mode were also obtained as minor products. The tetraruthenium cluster [H2Ru4(CO)13] was reacted with chiral diphosphine ligands of the Josiphos family (J007 and J015). Four products were isolated: [H2Ru4(CO)11(µ-1,2-J007)] 6 and [H2Ru4(CO)11(µ-1,2-J015)] 7, in which the diphosphine coordinates in a bridging mode, as well as [H2Ru4(CO)11(µ-1,1-J007)] 8 and [H2Ru4(CO)11(µ-1,1-J015)] 9, where the diphosphine coordinates in a chelating mode. Clusters 6 and 7 were found to give high conversion and good enantiomeric excess for the hydrogenation of tiglic acid. IR spectroscopy indicates that 6 is a precursor to the active catalyst, while 8 may be an active catalyst. (Less)
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http://lup.lub.lu.se/student-papers/record/8965219
- author
- Mannaa, Atef
- supervisor
- organization
- course
- KEMZ02 20091
- year
- 2010
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- inorganic chemistry, oorganisk kemi
- language
- English
- id
- 8965219
- date added to LUP
- 2019-01-08 08:56:10
- date last changed
- 2019-01-08 08:56:10
@misc{8965219, abstract = {{Triruthenium dodecacarbonyl was reacted with the non chiral ligand PSSP as well as chiral ferrocenyl diphosphines of the Josiphos (J008, J006 and J015) and Walphos (W009) families to give [Ru3(CO)10(µ-1,2-P-P)], (P-P = W009 1, J008 2, J006 3, J015 4 and PSSP 5. The X-ray structure of 3 shows that a Ru-Ru edge is bridged by a diphosphine ligand in an equatorial coordination mode. The corresponding clusters with the ligand in a chelating coordination mode were also obtained as minor products. The tetraruthenium cluster [H2Ru4(CO)13] was reacted with chiral diphosphine ligands of the Josiphos family (J007 and J015). Four products were isolated: [H2Ru4(CO)11(µ-1,2-J007)] 6 and [H2Ru4(CO)11(µ-1,2-J015)] 7, in which the diphosphine coordinates in a bridging mode, as well as [H2Ru4(CO)11(µ-1,1-J007)] 8 and [H2Ru4(CO)11(µ-1,1-J015)] 9, where the diphosphine coordinates in a chelating mode. Clusters 6 and 7 were found to give high conversion and good enantiomeric excess for the hydrogenation of tiglic acid. IR spectroscopy indicates that 6 is a precursor to the active catalyst, while 8 may be an active catalyst.}}, author = {{Mannaa, Atef}}, language = {{eng}}, note = {{Student Paper}}, title = {{Synthesis and characterization of transition metal carbonyl clusters with chiral ligands and their application in asymmetric catalysis}}, year = {{2010}}, }