Question
Two answers required. The strength of these two types of entities is measured by the sEDA and pEDA parameter scales. For 10 points each:
[10m] Name these two entities that contribute plus-M and minus-M mesomeric effects. Halogens are an exception to the rule that these two entities direct the regioselectivity of certain reactions, in which they can be replaced by an ipso attack.
ANSWER: electron donating groups AND electron withdrawing groups [or EDGs or electron releasing groups or ERGs in place of “electron donating groups”; or EWGs in place of “electron withdrawing groups”]
[10h] An EDG and an EWG are found on opposite sides of a double bond in these systems, leading to a highly polarized pi bond that makes them compounds of interest as dye sensitizers and optical molecular switches.
ANSWER: push–pull systems
[10e] EDGs and EWGs generally activate and deactivate EAS reactions such as this set of reactions, in which a strong Lewis acid is used to add alkyl or acyl substituents to an aromatic ring.
ANSWER: Friedel–Crafts reactions [accept Friedel–Crafts alkylation or Friedel–Crafts acylation]
<KP, Chemistry>
Summary
| 2024 Chicago Open | 07/28/2024 | Y | 1 | 20.00 | 100% | 100% | 0% |
Data
| LMM's LLM MLM | A Nervy Liberal Nanny Hence | 10 | 0 | 10 | 20 |