Resonance, Tautomerism, Conjugation and Conformation Flashcards
1
Q
Drawing a curly arrow, what must you do?
A
- identify the most unstable pair of electrons
- arrows start here, draw to atom or between atoms
- balance charges
2
Q
What is the most unstable thing to the least unstable thing? (regarding where to start curly arrows)
A
Least stable 1) Negative charge 2) Lone pair of electrons 3) A bond Most Stable
3
Q
What is resonance?
A
- movement of electrons only (no atoms)
- Juggling a negative charge
4
Q
The more resonance structures you can draw the…
A
more stable the structure is
5
Q
What is delocalisation?
A
- spreading of electronic charge –> can form a resonance hybrid
6
Q
Tautomerism is…
A
- movement of one or more double bonds and a small atom (usually hydrogen)
7
Q
Conjugation is…
A
- alternation of single and double bonds (double bonds linked by a single)
8
Q
Conformation is…
A
- rotation of bonds (no bonds are broken)
9
Q
Difference between staggered conformation and eclipsed
A
- eclipsed is the highest energy conformation due to electron repulsions
- staggered is the lowest energy conformation
10
Q
What skeletal shape does staggered conformation take?
A
- zigzag
