1.
Angew Chem Int Ed Engl
; 39(9): 1602-1604, 2000 May.
Article
in English
| MEDLINE
| ID: mdl-10820447
2.
Angew Chem Int Ed Engl
; 38(16): 2416-2419, 1999 Aug.
Article
in English
| MEDLINE
| ID: mdl-10458807
ABSTRACT
Two N-heterocyclic carbene ligands at once may be one too many, at least if you intend to have highly active ruthenium catalysts for olefin metathesis. Density functional calculations recommend the replacement of the second carbene ligand in the successful ROMP catalysts 1 by coordinatively more labile ligands as in 2 or 3. In both cases, the catalytic activity is greatly improved.