Coordination and activation of azetidine by a triosmium cluster

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Organometallics; (United States)

DOI:https://doi.org/10.1021/om00030a017· OSTI ID:6045165

Adams, R D; Chen, G ^[1]

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1. 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), Vol. 12:6; ISSN 0276-7333
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HETEROCYCLIC COMPOUNDS
TEMPERATURE DEPENDENCE
OSMIUM COMPLEXES
CRYSTALLOGRAPHY
SYNTHESIS
CHEMICAL REACTIONS
EXPERIMENTAL DATA
PYROLYSIS
SPECTROSCOPY
X-RAY DIFFRACTION
COHERENT SCATTERING
COMPLEXES
DATA
DECOMPOSITION
DIFFRACTION
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
SCATTERING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties
400102 - Chemical & Spectral Procedures