Lec-35-Chap12-2

Lec-35-Chap12-2 - Carboxylic Acids Contain the -COOH...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Carboxylic Acids Contain the -COOH functional group. They: • react with base to form salts. • are polar, and form H-bonds with each other. • have relatively high bp (higher than the alcohol): ± formic acid HCOOH bp = 101°C ± methanol CH 3 OH bp = 65°C Many are known by common names. .. Carboxylic Acids Some naturally occurring carboxylic acids: Structure Common Name bp (°C) Source H- formic acid 101 Ants CH 3 acetic acid 118 Fermented fruit CH 3 CH 2 propionic acid 141 Dairy products benzoic acid 250 Berries OH mp (°C) HOOC-CH 2 -C-CH 2 -COOH citric acid 153 Citrus fruit COOH HOOC-CH 2 -CH-CH 2 -COOH malic acid 131 Apples OH HOOC-CH 2 -CH-CH-COOH tartaric acid 168-170 Grape juice, wine OH OH COH O || COH O || COH O || COH O ||
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
An acid reacts with an alcohol to form an ester ester OO R-OH + H-O-C-R ′→ R-O-C-R + H 2 O Acids and Esters ester || || Esters are common food flavoring agents methyl butanoate (apple) ethyl methanoate (rum essence) ethyl butanoate (pineapple) pentyl ethanoate (banana) pentyl butanoate (apricot) octyl butanoate (orange)
Background image of page 2
Carboxylic Acids Some naturally occurring carboxylic acids: Structure Common Name bp (°C) Source H- formic acid 101 Ants CH 3 acetic acid 118 Fermented fruit CH 3 CH 2 propionic acid 141 Dairy products benzoic acid 250 Berries OH mp (°C) HOOC-CH 2 -C-CH 2 -COOH citric acid 153 Citrus fruit COOH HOOC-CH 2 -CH-CH 2 -COOH malic acid 131 Apples OH HOOC-CH 2 -CH-CH-COOH tartaric acid 168-170 Grape juice, wine OH OH COH O || COH O || COH O || COH O || Carboxylic Acids Some naturally occurring carboxylic acids: Structure Common Name bp (°C) Source H- formic acid 101 Ants CH 3 acetic acid 118 Fermented fruit CH 3 CH 2 propionic acid 141 Dairy products benzoic acid 250 Berries OH mp (°C) HOOC-CH 2 -C-CH 2 -COOH citric acid 153 Citrus fruit COOH HOOC-CH 2 -CH-CH 2 -COOH malic acid 131 Apples OH HOOC-CH 2 -CH-CH-COOH tartaric acid 168-170 Grape juice, wine OH OH COH O || COH O || COH O || COH O ||
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3 Fatty acid + glycerol triglyceride + 3 H 2 O Triglycerides: Biologically Important Esters Edible fats (solids) and oils (liquids) are triglycerides.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 25

Lec-35-Chap12-2 - Carboxylic Acids Contain the -COOH...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online