In: Chemistry
Item 11 Predict the result of reacting each compound with Lucas test and chromic acid respectively.
Part D
hexan-1-ol
a. no reaction, no reaction
b. instantly cloudy; no reaction
c. no reaction; blue-green color change
d. instantly cloudy; blue-green color change
Part E
cyclohexanol
a. instantly cloudy; blue-green color change |
b. cloudy in 1-5 min; no reaction |
c. cloudy in 1-5 min; blue-green color change |
d. instantly cloudy; no reaction |
Part F
allyl alcohol
a. instantly cloudy; no reaction |
b. no reaction; blue-green color change |
c. instantly cloudy; blue-green color change |
d. no reaction; no reaction |
(D)
Hexan-1-ol + lucas reagent ---------> no reaction, (because of less reactivity of primary alcohol due to formation of less stability of primary carbocation intermediate)
Hexan-1-ol + Chromic acid --------------> hexanoicacid, so color change from blue - green
(E)
Cyclohexanol + lucas reagent --------->cloudy in 1-5 min, (because of moderate reactivity of secondary alcohol due to formation of moderate stability of secondary carbocation intermediate)
Cyclohexanol + Chromic acid --------------> cyclohexanone, so color change from blue - green
(F)
Allyl alcohol + Lucas reagent -------------> Instantly cloudy (
because of more stable allyl carbocation intermediate)
Allyl alcohol + Chromic acid ----------> 2-propenal ( blue-green color change)