Ch. 15 Flashcards
Isolated double bond
Double bonds separated by two or more single bonds
Conjugated double bond
Double bonds separated by one single bond
Cumulated double bonds
Double bonds are on adjacent carbons
Which ones have more interaction? Conjugated, isolated, or cumulated double bonds?
Conjugated
The more stable diene, the ______ heat of hydrogenation released
Less
Which ones are the most stable? Trans conjugated, Cis conjugated, isolated, or cumulated.
Trans conjugated followed by Cis conjugated
Which ones are the least stable? Trans conjugated, Cis conjugated, isolated, or cumulated.
Cumulated
What is the resonance of a system?
The extra stability which arises when conjugation is present in a molecule
The more anti bonding, the _____ energy molecular orbital
Higher
What is the allylic position?
The carbon next to the carbon in a double bond
Stability of allylic carbocations
Methyl < 1 < 2 < allyl < 3, substituted allylic
which one is more stable? the kinetic or the thermodynamic product
thermodynamic
which product belongs to the thermodynamic product? 1,2 or 1,4
1,4 is the thermo product
1,2 is the kinetic product
which product forms at lower temperatures? the thermo or thekinetic product
the kinetic product forms at lower temperatures
the thermo product forms at higher temperatures
when you add NBS to a diene, what do you get?
you obtain a Br in the allylic position
