Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
OCHEM FINAL EXAM
| BLANK | ANSWER |
|---|---|
| In the dienophile, the ____ is raised by the addition of electron ___________ groups | HOMO, withdrawing |
| In the diene, the LOMO is _______ by the addition of electron _______ groups | Lowered, donating |
| In the allyl radical, the nonbonding orbital (SOMO) is (in phase/out of phase) | Out of phase |
| If there are 3 atomic orbitals, there are _ molecular orbitals | 3 |
| The HOMO is always (in phase/out of phase) | In phase |
| A conjugated system is (more/less) stable than an unconjugated system | more |
| Energy required to jump 1 electron 1 orbital | HOMO-LUMO gap |
| A molecule absorbs the (same/opposite) color that it emits | opposite |
| In nucleophilic attack of dienes, the two possible additions are denoted as __, __. The more stable form (thermodynamic form) is __, while the other is kinetic. | 1,4; 1,2; 1,4 |
| Raising the HOMO gap and lowering the LUMO gap is important in the dies-alder reaction because it lowers the ___________, making the addition easier | HOMO-LUMO gap |
| Dienophiles are activated by _________________ groups | Electron withdrawing |
| Dienes are activated by _______________ groups | Electron donating |
| Dies Alder is a (syn/anti) addition | syn |
| In electrophilic aromatic substitution, the ________ of the ________ ____ is replaced by the electrophile | Hydrogen, aromatic ring |
| Halogenation: aromatic ring + ___ | X2, FeX3 |
| Nitration: aromatic ring + ____ | HNO3, H2SO4 |
| Sulfonation: aromatic ring + ____ | SO3, H2SO4 |
| Friedel-Crafts Alkylation: aromatic ring + ____. In place of the alkyl halide, ____ can be used | RCl, AlCl3, catalytic acid |
| Friedel-Crafts Acylation: aromatic ring + ____ | RCOCl, AlCl3 |
| The rate determining step of electrophilic aromatic substitution is the _____, and the fastest step is the ________ | Nucleophilic attack by aromatic ring, regeneration of aromatic ring |
| Which cannot be used for the Friedel-Crafts Alkylation as an acid? FeX3, AlCl3, BF4, BF3, ZrCl4 | BF4 |
| The Friedel-Crafts Alkylation does not work if electron ________ groups are on the ring. It is faster if _____ substituents are on the ring. | Withdrawing, alkyl |
| The Friedel-Crafts Acylation does not work if a ___________ is on the ring | substituent |
| Clemmensen Reduction: aromatic ring with carbonyl + Zn(Hg) in HCl yield ___ | Aromatic ring without carbonyl |
| Wolff-Kishner Reduction: aromatic ring with carbonyl + hydrazine, KOH yields | Aromatic ring without carbonyl |
| Electron donating substituents are __ directing | o/p |
| Electron withdrawing substituents are __ directing | m |
| Benzylic halogenation: toluene + Cl2 yields (mono/polychlorinated) | polychlorinated |
| H2, metal; Fe, acid, EtOH, H2O | Reducers |
| Fe, acid, EtOH, H2O; KMnO4, OH-, H+; H2Cr2O4 | Oxidators |
| Birch reduction dissolves metal to ______ aromatic rings to 1.4-cyclohexadienes using a mixture of ____________ | Reduce, ammonia and alcohol |
Created by:
oclar11