期刊
ORGANIC CHEMISTRY FRONTIERS
卷 5, 期 9, 页码 1532-1536出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qo00160j
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资金
- NSF [1361620]
- UIUC
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1361620] Funding Source: National Science Foundation
Ruthenium alkylidene complexes are prepared via enyne ring-closing metathesis relying on the exo and endo gem-dialkyl substituent effect. The structural features stabilizing oxygen-chelates are explored and confirmed by single crystal X-ray diffraction analyses. In stark contrast to the previously reported oxygen chelated Grubbs-type complexes, all chelates prepared through a ring-closing enyne metathesis regime show the disposition of the chelated oxygen and the NHC ligand in cis relationship, which force the two chloride ligands in cis-orientation. The newly synthesized oxygen-chelated ruthenium alkylidene complexes are metathesis active only at elevated temperatures.
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