par Vanderlinden, Paul;Boué, Stéphane 
Référence Journal of organometallic chemistry, 87, 2, page (183-188)
Publication Publié, 1975-03
Référence Journal of organometallic chemistry, 87, 2, page (183-188)
Publication Publié, 1975-03
Article révisé par les pairs
| Résumé : | 2-Trimethylstannyl-l,3-butadiene has been synthesized by a Würtz-type coupling reaction and submitted to direct excitation by light of 253.7 or 228.8 nm wavelength in cyclohexane solution. The photolysis produced, with equally low quantum yields, polymers and three valence isomers identified as 1-trimethylstannylcyclobutene, 1-methylene-2-trimethylstannylcyclopropane and 3-trimethylstannyl-1,2-butadiene; the latter is not a primary product and is believed to arise from the thermal rearrangement of 3-methyl-3-trimethylstannylcyclopropene. No homolytic splitting of the excited molecule could be detected. The disappearance quantum yield of 2-trimethylstannyl-1,3-butadiene exhibits a strong concentration dependence from which a lowest lifetime limit of 3 × 10-7 s is deduced for the excited state. The complex-forming ability and the long lifetime which are associated with the presence of the tin atom suggest that an important interaction occurs between the π system and the empty 5d orbitals of the metal. © 1975. |
