Back to Search
Start Over
Prototypical Transition-Metal Carbenes, (CO)5Cr═CH2, (CO)4Fe═CH2, (CO)3Ni═CH2, (CO)5Mo═CH2, (CO)4Ru═CH2, (CO)3Pd═CH2, (CO)5W═CH2, (CO)4Os═CH2, and (CO)3Pt═CH2: Challenge to Experiment
- Source :
- The Journal of Physical Chemistry - Part A; August 2018, Vol. 122 Issue: 32 p6570-6577, 8p
- Publication Year :
- 2018
-
Abstract
- Transition-metal carbenes are useful in organometallic chemistry due to their demonstrated use as catalysts in carbon–carbon bond-forming reactions. Yet the prototypical transition-metal carbenes, consisting of a single metal center doubly bonded to a methylene ligand and surrounded by carbonyls, have been elusive to experimental synthesis. This theoretical work examines the structures and properties of nine prototypical transition-metal carbenes. Optimized values for M═CH2bond lengths, dissociation energies, and vibrational frequencies are reported. The M═CH2bond distances range from 1.81 (Ni) to 2.05 Å (Pd). The M═CH2dissociation energies fall in the range of 16.4 (Pd) to 92.3 kcal mol–1(Os). The spectroscopic observation of several of these molecules should be possible.
Details
- Language :
- English
- ISSN :
- 10895639 and 15205215
- Volume :
- 122
- Issue :
- 32
- Database :
- Supplemental Index
- Journal :
- The Journal of Physical Chemistry - Part A
- Publication Type :
- Periodical
- Accession number :
- ejs46110452
- Full Text :
- https://doi.org/10.1021/acs.jpca.8b05394