Isomerism Flashcards
1
Q
2 criteria for cis-trans
A
- Restricted rotation of c=c bond due to the presence of a pi bond
- C involves in c=c must have 2 diff groups
2
Q
Explain enantiomerism
A
Chiral or no chiral;
No plane of symmetry;
Mirror images are non-superimposable;
Enantiomerism;
Chiral molecule;
Optical active
3
Q
2^n, n=?
A
No of chiral carbon +
No of cis-trans double bond
4
Q
BP bt cis and trans
A
Cis> trans
- dipole moment;
- pdpd > idid;
- more energy is req’…
5
Q
MP bt cis trans
A
Trans > cis
more efficient packing;
More molecules per unit volume;
Higher mp
6
Q
Why certain compound cannot exhibit cis-trans?
A
Only cis/trans form can exhibit;
Ring strain
