Reversible stereospecific extrusion of ethylene from a 1,2-diosmacyclobutane. Determination of stereochemistry by liquid-crystal NMR

Journal Article · Wed May 27 04:00:00 EDT 1987 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00245a052· OSTI ID:6368114

Hembre, R T; Scott, C P; Norton, J R

The authors now report that the loss of ethylene from (..mu..-1,2-ethanediyl)octacarbonyldiosmium (1) is stereospecific. In a reaction analogous to the desorption of an olefin from a metal surface, undergoes facile ethylene loss. As 1 is related to cyclobutane by the isolobal analogy between Os(CO)/sub 4/ and CH/sub 2/, the loss of ethylene from 1 can be compared to the fragmentation of cyclobutane into two ethylenes - a classic example of a reaction forbidden by orbital symmetry as a concerted process. One would, therefore, expect the loss of ethylene from 1 to be forbidden as a concerted process and to occur by a diradical mechanism leading to loss of stereochemistry.

• Research Organization: Colorado State Univ., Fort Collins
• DOE Contract Number: FG02-84ER13299
• OSTI ID: 6368114
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 109:11; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
CARBONYLS
CHEMICAL REACTIONS
DATA
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MAGNETIC RESONANCE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
OSMIUM COMPOUNDS
REACTION INTERMEDIATES
REFRACTORY METAL COMPOUNDS
RESONANCE
SPECTRA
STEREOCHEMISTRY
TRANSITION ELEMENT COMPOUNDS