CHM247H1 Chapter Notes - Chapter 21: Diisobutylaluminium Hydride, Glycerol, Steric Effects
Document Summary
Chapter 21: carboxylic acid derivatives: nucleophilic acyl substitution reactions. Jasmyn lee: name the alkyl group, name the acyl group ethyl acetate (ethanoate, replace ic acid with ate . For all 1 amides: replace ic acid, oic acid, ylic acid with amide. Naming 2 and 3 amides: name the alkyl group (groups) bonded to n first, use n as a prefix before each alkyl group name, in a 3 amide, if two groups are the same, use n,n-dialkyl . Jasmyn lee: as the c=o bond becomes more delocalized, adsorption shifts to lower frequency, conjugation also shifts c=o absorption to lower frequencies. Other ir adsorptions: 1 and 2 amines. 1h nmr: proton signal at 2-2. 5 ppm. Identity of the carbonyl group cant be determined by 1h nmr because hydrogen"s of all acid derivatives absorb in the same range: protons of 1 and 2 amides adsorb at 7. 5-8. 5 ppm. 13c nmr: c=o peak at 160-180 ppm, c n peak at 115-120 ppm.
