Coordination and activation of azetidine by a triosmium cluster
- Univ. of South Carolina, Columbia (United States)
The ring opening of nitrogen-containing heterocycles is an integral step in the process of hydrogenitrogenatio. The mechanisms by which this step occurs are poorly understood; thus a considerable amount of research has been devoted to modeling this heterogeneous reaction by using homogeneous catalysts. Although it has considerable ring strain, the four-membered heterocycle, azetidine, is opened thermally only at temperatures in excess of 400[degrees]C. Recently, we have found that thietanes, the saturated four-membered heterocycles containing sulfur, undergo facile ring opening when the molecule is coordinated to osmium cluster complexes. It was shown that a bridging coordination of the sulfur atom promotes this process. Thus, we wondered if it might also be possible to open an azetidine ring in a cluster complex under conditions sufficiently mild that a detailed study of the process might be possible. We have now prepared an osmium cluster complex in which the nitrogen atom of the azetidine ligand bridges two of the metal atoms, and we have found that the azetidine ring is spontaneously opened when the complex is heated to 125[degrees]C. In addition, two other complexes formed by transformation of the azetidine ligand have been isolated and characterized. The results of this study are reported here. 20 refs., 4 figs., 13 tabs.
- OSTI ID:
- 6045165
- Journal Information:
- Organometallics; (United States), Journal Name: Organometallics; (United States) Vol. 12:6; ISSN ORGND7; ISSN 0276-7333
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
CHEMICAL REACTIONS
COHERENT SCATTERING
COMPLEXES
CRYSTALLOGRAPHY
DATA
DECOMPOSITION
DIFFRACTION
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OSMIUM COMPLEXES
PYROLYSIS
SCATTERING
SPECTROSCOPY
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPLEXES
X-RAY DIFFRACTION