Question

What are the products obtained when acetic anhydride reacts with $PC{l_5}?$
$A)$ Acetyl chloride and phosphorus oxychloride
$B)$ Acetyl chloride and phosphorus acid
$C)$ Acetyl chloride and phosphoric acid
$D)$ Acetyl acid phosphorus chloride

Answer 1

Phosphorus pentachloride is one of the most important phosphorus chlorides, and used as a chlorinating reagent. It is a colorless, water-sensitive, and moisture-sensitive solid.

Complete step by step solution:
It is given in the question that what product we will get from reacting acetic anhydride with $PC{l_5}$.
The reaction of acetic anhydride and $PC{l_5}$is as follows.
${(C{H_3}CO)_2}O + PC{l_5} \to 2C{H_3}COCl + POC{l_3}$.
In the above reaction, $1$ mole of acetic anhydride reacts with $1$ mole of phosphorus pentachloride and gives $2$ moles of acetyl chloride and $1$ mole of phosphorus oxychloride.

So, the correct option is $(A)$.
Acetyl chloride and phosphorus oxychloride are obtained when acetic anhydride reacts with $PC{l_5}$.

Additional Information:
Acetyl chloride is utilized for acetylation reaction, the presentation of an acetyl group. Acetyl is an acyl group. For additional data on the kinds of chemical reaction mixtures, for example, acetyl chloride can go through, see acyl halide. Two significant classes of acetylations include esterification and the Friedel-Crafts reaction.
Acetyl chloride is a reagent for the preparation of esters and amides of acetic acid, utilized in the derivatization of alcohols and amines. One class of acetylation reactions are esterification.

Note:
Acetyl chloride isn't relied upon to exist in nature, since contact with water would hydrolyze it into acetic acid and hydrogen chloride. Indeed, whenever dealt with outside it discharges white "smoke" coming about because of hydrolysis because of the dampness noticeable all around. The smoke is in reality little drops of hydrochloric acid and acetic acid shaped by hydrolysis.