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Article Dans Une Revue Science Année : 2006

Cyclopropenylidenes: From Interstellar Space to an Isolated Derivative in the Laboratory

Résumé

Like many of the molecular species that have been detected in the interstellar medium, the singlet carbene cyclopropenylidene (C 3 H 2 ) has been presumed to be too unstable to isolate in the laboratory. However, by appending π-electron–donating amino groups to the triangular skeleton, we prepared a cyclopropenylidene derivative that is stable at room temperature. In contrast to previously isolated carbenes, this compound does not require a heteroatom adjacent to the electron-deficient carbon to confer stability. Despite the presence of amino groups, the geometric parameters of the cyclic skeleton, revealed by x-ray crystallography, are only slightly perturbed relative to those of the calculated structure of unsubstituted cyclopropenylidene. Stable cyclopropenylidene derivatives might thus serve as models for a better understanding of the formation of carbon-bearing molecules in the interstellar medium.

Dates et versions

hal-03739660 , version 1 (28-07-2022)

Identifiants

Citer

Vincent Lavallo, Yves Canac, Bruno Donnadieu, Wolfgang Schoeller, Guy Bertrand. Cyclopropenylidenes: From Interstellar Space to an Isolated Derivative in the Laboratory. Science, 2006, 312 (5774), pp.722-724. ⟨10.1126/science.1126675⟩. ⟨hal-03739660⟩

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