Question

- Suggest two different chemical tests that would help distinguish between the following pairs of compounds. State what you would do and what you would see:

a) benzaldehyde and benzyl alcohol

b) 2-pentanone and 3- pentanone

c)propanal and diethyl ether

d) acetophenone and phenylacetaldehyde

e)Propanal and propanoic acid

-Suggest an IR frequency that would help distinguish between each pair of the previous compounds

Answer 1

Solution:

Given that:

Answer Griven tha a zal dehy de and benzy alcha! benzaldehyde be tra a aldehyde ㅻduca Toners λ.altnt.to 얍tve selver mCr Produces Aad -And alto ve a 2,4-DNP ebenzy b 2-pentanone and 3- pentanene oto om2 pent anone bea kentone ot Todo om but 3 pentanone clocs no

Soatum bs 2 pentanone betnga me thl enone ㄅ addon CompouncW tle 3 3eve this -jest. Pent-a no ne does hor Pro pa n ( being an hern a aldehyde )uduce4 oil ens haagent-.togfve tive1 mrré 」 propana/ 2,4 ← dinï trop hen hydrazone

phenone and pheny lacata dehyde beng a methy' whtle phenglacetalde hde ketone 32ve iocdo CHC CHo) does not 12 Nao tollens teat - phenlaceae hycde beîn ar but aeophenone beng Ketone does not C6HE CH2 CHo 2coo + NH3 Propanal and Propanorc acto Sodtum brcar bonates ests befn propantc acia CH3CH Coo decompose NaHCo 3 to produ brtsk e-fferve scence cua

→ To evolution or co2 while propanol tH3CH2CHoj befn1 an aldehyde does not. Oeve thỉs teat CH3CH2 cooH Na Hco3 . C 3CH2 CooNa