Kinetic studies on the rearrangement of Diels?Alder adducts of activated benzoquinones with (E)-1-trimethylsiloxybuta-1,3-diene
✍ Scribed by Santos, Jos� G.; Robert, Paz; Valderrama, Jaime A.
- Book ID
- 121348657
- Publisher
- Royal Society of Chemistry
- Year
- 1993
- Tongue
- English
- Weight
- 509 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1472-779X
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The reactions k N n m endo-5-Ybicyclo[2.2.2loct-2-ene (NYBO) eno-5-Ybicyclo[2.2.2loct-2-ene (XYBO) O + < , < (YE) KXYBO (CHD) where Y = CH, (MI, C,H, (E), i-C,H, (I), and t-C,H, (TI have been studied between 488 and 606 K. The pressures of CHD ranged from 16 to 124 torr and those of YE from 57 to 62
The kinetics of the Diels-Alder additions of C H 2 = CHCN, CH, = C(CH3) CN, and cisand trans-CH,CH = CHCN to cyclohexa-l,3-diene have been studied in the gas phase. The stereochemistry of these reactions is discussed. In terms of a biradical mechanism, a minimum value of 4.1 5 0.8 kcal mol-' for the