Alkenes Flashcards
Another word for 2-methyl-1-propene
Isobutylene
Degree of unsaturation (number of double bonds ) can be determined by what equation ?
N= 1/2(2n + 2-m) for CnHm
What has a lower boiling point? Terminal alkenes or internal alkenes?
Terminal alkene
Do cis or trans have higher melting points?
Trans because they pack better in the solid state
Do trans or cis have a lower boiling point?
Trans because they are less polar
Explain when sn1 or e1 reactions are favoured
Always in competition. Will get a mixture. Except with high temperatures, then e1 will overrule
For e2, when a strong base removes a proton, the halide ion ____ to the proton will leave.
Anti
What is Zaitsevs rule ?
The more substituted bond is formed preferentially
When will e2 vs sn2 occur?
1) if highly substituted = e2
2) if bulky base = e2 if strong base = sn2
Reduction of an alkene through catalytic hydrogenation needs the aid of what? What type of addition ?
A metal catalyst
Syn
Markovnikovs rule ?
The product with the halide on the most substituted carbon
Adding water to an alkene must be done under ___ temperatures and ___ conditions
Low
Acidic
Free radical additions are called ______ because the X adds on to the less substituted area due to the radical adding to the most substituted carbon
Anti Markovnikov
