Abstract
The isomerlzation of CD 2 =CH-CH 3 on amorphous and micro-crystalline chromia has been followed by combined microwave and mass spectroscopies. On both catalysts the isomerization is primarily intramolecular. The measured isotope effect k H /k D for intramolecular isomerization is 4 and 5 and the activation energies 9.2 and 14 kcal/mol, respectively, on amorphous and microcrystalline chromia. The intramolecular isomerization on amorphous chromia occurs through an allylic carbanion. The intermediate on micro-crystalline chromia is about 5-6 kcal/mol less stable than the allylic carbanion and is probably a covalently bonded σ-or π-allyl.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
