Benzene & Phenol Flashcards Preview

OCR A-level Chemistry A > Benzene & Phenol > Flashcards

Flashcards in Benzene & Phenol Deck (14):
1

nitration of benzene

c.HNO3, c.H2SO4 (catalyst), reflux, 50°C, electrophile=NO2+(nitronium ion)

2

making nitronium ion

H2SO4+HNO3<>HSO4-+NO2++H2O HSO4-+H+->H2SO4

3

halogenation of benzene

halogen, halogen carrier (AlCl3, FeCl3), reflux, electrophile=X+

4

production of Cl+

Cl2+AlCl3 <>AlCl4-+Cl+ AlCl4-+H+->AlCl3+HCl

5

alkylation of benzene

haloalkane, anhydrous AlCl3, room temp, dry inert solvent, electrophile=carbocation (R+)

6

acylation of benzene

acyl chloride, anhydrous AlCl3, reflux, 50°C, dry inert solvent, electrophile=RC=O+

7

phenol+alkali->

metal phenoxide+water

8

phenol+sodium->

sodium phenoxide+H2

9

phenol+bromine->

2,4,6-tribromophenol+3HBr, electrophilic substitution, RTP

10

nitration of phenol

dilute HNO3, RTP, NO2->2 or 4

11

Electron donating groups

OH, CH3, NH2

12

Electron withdrawing groups

NO2

13

Evidence for benzene structure

All bond the same length (X-ray diffraction)
Doesn't decoliurise bromine water
Enthalpy of reduction is -208, should be -360 with 3 double bonds

14

Appearance of phenol

Pink, crystalline solid