1453-25-4Relevant articles and documents
Pines,Chen
, p. 3562 (1960)
Photocatalytic-controlled olefin isomerization over WO3–x using low-energy photons up to 625 nm
Sun, Xichen,Waclawik, Eric R.,Wang, Yunwei,Zhang, Jin,Zheng, Zhanfeng,Zhu, Pengqi
, p. 1641 - 1647 (2021/06/28)
WO3–x (W-1) was used to achieve controllable photoisomerization of linear olefins without substituents under 625 nm light irradiation. Thermodynamic and kinetic isomers were obtained by regulating the carbon chain length of the olefins. Terminal olefins were converted into isomerized products, and the internal olefin mixtures present in petroleum derivatives were transformed into valuable pure olefin products. Oxygen vacancies (OVs) in W-1 altered the electronic structure of W-1 to improve its light-harvesting ability, which accounted for the high activity of olefin isomerization under light irradiation up to 625 nm. Additionally, OVs on the W-1 surface generated unsaturated W5+ sites that coordinated with olefins for the efficient adsorption and activation of olefins. Mechanistic studies reveal that the in situ formation of surface π-complexes and π-allylic W intermediates originating from the coordination of coordinated unsaturated W5+ sites and olefins ensure high photocatalytic activity and selectivity of W-1 for the photocatalytic isomerization of olefins via a radical mechanism.
CLEAVAGE OF (3-CHLORO-2-METHYLENECYCLOALKYL)PALLADIUM CHLORIDE DIMERS: FORMATION OF OLEFINS AND α-METHOXYOLEFINS
Donaldson, William A.
, p. 2901 - 2908 (2007/10/02)
The cleavage of the title compounds (7) in methanolic potassium hydroxide gives mixtures of olefins and α-methoxyolefins in good yields.The ratio of the products is dependent on the size of the carbocyclic ring.The mechanism proposed involves cleavage of 7 to the corresponding allylic chloride (8).Solvolysis of the chloride gives the α-methoxyolefin.Alternatively, oxidative addition of 8 to Pd(O) generates a new ?-allyl complex which affords the olefin product upon subsequent cleavage.