Cinnamic Acid | Uses, Structure, Preparation, & Properties |

Cinnamic Acid.

Cinnamic acid is 3-phenylpropenoic acid.

Preparation of cinnamic acid. Cinnamic acid is obtained:

By heating benzaldehyde amongst acetic anhydride at 180C. ( perkin's Reaction ).

By handling of benzaldehyde amongst ethyl acetate inwards the presence of sodium ethoxide followed yesteryear acid-hydrolysis of the resulting ester. ( Claisen Condensation ).

By heating benzaldehyde amongst malonic acid inwards alcoholic ammonia solution. ( knoevenagel's Reaction ).

Properties of cinnamic acid.

Cinnamic acid is a crystalline solid, mp 133C. It is sparingly soluble inwards water. It behaves equally an α,β-unsaturated acid together with a benzene derivative.
Cinnamic acid reacts amongst sodium hydroxide to shape sodium cinnamate.

Cinnamic acid reacts amongst ethyl alcohol inwards the presence of an acid catalyst to plow over ethyl cinnamate.

Cinnamic acid reacts amongst PCl5 or SOCl2 to shape cinnamoyl chloride.

Cinnamic acid reacts amongst bromine inwards carbon tetrachloride to plow over dibromocinnamic acid.

Cinnamic acid undergoes reduction amongst sodium amalgam together with H2O to plow over 3-phenylpropanoic acid.

It undergoes reduction amongst lithium aluminum hydride to shape 3-phenyl-2-propenol.

Cinnamic acid undergoes oxidation amongst hot acidic KMnO4 to plow over benzoic acid.

Cinnamic acid undergoes decarboxylation amongst soda -lime to yield styrene.

It undergoes electrophilic exchange reactions to shape o,p-isomers. For example,

Uses.

Cinnamic acid uses. Cinnamic acid used inwards flavorings, certain pharmaceuticals, and synthetic indigo. Major purpose inwards the manufacturing of the benzyl, methyl, ethyl, together with benzyl esters for the perfume industry.

Structure.

Cinnamic acid structure. Cinnamic acid is an organic chemical compound amongst the formula C₆H₅CH=CHCOOH. Cinnamic acid is a white crystalline chemical compound this is slightly soluble inwards water, or freely soluble inwards many organic solvents.

Hazards.

Cinnamic acid hazards.

Skin irritation.

Serious oculus irritation.

Respiratory irritation.

Avoid breathing fume/ dust/ mist/ gas/ vapours/ spray.