Carboxylic Acid and Esters

Hi, can someone help me with these questions please?

What do u get when u react 2-hydroxypropanoic acid with:

a) Acidified Potassium Dichromate

b) Excess PCl5

c) Ammonia (gaseous)

d) Aqeous Sodium Hydroxide

e) Ethanol in the presence of conc. Sulphuric Acid

f) (CH₃ )₂ NH (dont know the name sorry :frown:

)

What types of reaction are occuring in:

a, d and e?

Also, when 2-hydroxypropanoate is converted to 2-hydroxypropanoic acid:

i) Give the reagents and conditions necessary...I put dilute aqeuous acid + reflux..is this right?

ii) What type of reaction is this...I put hydrolysis? Is this right?

Finally, why is conc Sulphuric Acid used to promote the reaction of a carboxylic acid with an alcohol?

Any help would be appreciated...and theres some rep in it for you :smile:

Reply 1

rupalini

can anyone help? PLEASE!

Reply 2

BCHL85

I think:
a) CH3(CO)(COOH) {Oxidation}
b) CH3(CHCl)(COCl)
c) CH3(CHOH)(COONH4)
d) CH3(CHOH)(COONa) {Acid-Base}
e) CH3(CHOH)(COOC2H5) {Esterification}
f) CH3(CHOH)(COO)(NH2)(CH3)2

Reply 3

BCHL85