1,8-Bis(imidazolin-2-yliden-1-yl)carbazolide (bimca):  A New CNC Pincer-Type Ligand with Strong Electron-Donating Properties. Facile Oxidative Addition of Methyl Iodide to Rh(bimca)(CO)†

2007 ◽  
Vol 26 (4) ◽  
pp. 1024-1030 ◽  
Author(s):  
Michael Moser ◽  
Barbara Wucher ◽  
Doris Kunz ◽  
Frank Rominger
2012 ◽  
Vol 10 (1) ◽  
pp. 256-266 ◽  
Author(s):  
Johannes Erasmus ◽  
Jeanet Conradie

AbstractThe reaction rate of the oxidative addition and CO insertion steps of methyl iodide with [Rh(PhCOCHCOPh)(CO)(P(OCH2)3CCH3)] are presented. Large negative experimental values for the activation entropy and results from a density functional theory computational chemistry study indicated trans addition of the CH3I to [Rh(PhCOCHCOPh)(CO)(P(OCH2)3CCH3)]. A study of the molecular orbitals gives insight into the flow of electrons during the oxidative addition reaction. CO insertion leads to a square pyramidal [Rh(PhCOCHCOPh)(P(OCH2)3CCH3)(COCH3)(I)] acyl product with the COCH3 moiety in the apical position. The strong electron donation of the P(OCH2)3CCH3 ligand accelerates the oxidation addition step of methyl iodide to [Rh(PhCOCHCOPh)(CO)(P(OCH2)3CCH3)] by ca. 265 times faster (at 35°C) than that of the Monsanto catalyst, but inhibits the CO insertion step.


2004 ◽  
Vol 689 (4) ◽  
pp. 801-810 ◽  
Author(s):  
Piotr Jaunky ◽  
Helmut W. Schmalle ◽  
Montserrat Alfonso ◽  
Thomas Fox ◽  
Heinz Berke

1985 ◽  
Vol 4 (7) ◽  
pp. 1198-1202 ◽  
Author(s):  
Samson S. M. Ling ◽  
Ian R. Jobe ◽  
Ljubica. Manojlovic-Muir ◽  
Kenneth W. Muir ◽  
Richard J. Puddephatt

2000 ◽  
Vol 599 (2) ◽  
pp. 166-169 ◽  
Author(s):  
Ja’afar K Jawad ◽  
Faisal N.K Al-Obaidy ◽  
Jasim A Hammud ◽  
Fathi Al-Azab

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