Advanced

Synthesis and characterization of transition metal carbonyl clusters with chiral ligands and their application in asymmetric catalysis

Mannaa, Atef (2010) KEMZ02 20091
Chemical 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)
Please use this url to cite or link to this publication:
author
Mannaa, Atef
supervisor
organization
course
KEMZ02 20091
year
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},
  keyword      = {inorganic chemistry,oorganisk kemi},
  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},
}