680 PHENOLS 24.11 (a) The parent compound is benzaldehyde Vanillin bears a methoxy group(CH O)at C-3 and a hydroxyl group(HO)at C-4 Vanillin (b, c) Thymol and carvacrol differ with respect to the position of the hydroxyl group CH(CH3) CH(CH) (2-isopropyl-5-methylphenol) (5-isopropyl-2-methylphenol) (d) An allyl substituent is-CH, CH=CH, OCH CHCH=CH Eugenol (e) Benzoic acid is CHCO, H. Gallic acid bears three hydroxyl groups, located at C-3, C-4, and C-5 COH HO allic acid (3, 4, 5-trihydroxybenzoic Benzyl alcohol is CsHS CH,OH. Salicyl alcohol bears a hydroxyl group at the ortho position Salicyl alcohol (o-hydroxybenzyl alcohol) Back Forward Main Menu TOC Study Guide Toc Student OLC MHHE Website24.11 (a) The parent compound is benzaldehyde. Vanillin bears a methoxy group (CH3O) at C-3 and a hydroxyl group (HO) at C-4. (b, c) Thymol and carvacrol differ with respect to the position of the hydroxyl group. (d) An allyl substituent is GCH2CH?CH2. (e) Benzoic acid is C6H5CO2H. Gallic acid bears three hydroxyl groups, located at C-3, C-4, and C-5. (f ) Benzyl alcohol is C6H5CH2OH. Salicyl alcohol bears a hydroxyl group at the ortho position. Salicyl alcohol (o-hydroxybenzyl alcohol) CH2OH OH Gallic acid (3,4,5-trihydroxybenzoic acid) CO2H HO OH OH 1 2 3 4 5 6 OH OCH3 CH2CH CH2 1 2 3 4 5 6 Eugenol (4-allyl-2-methoxyphenol) HO CH3 CH(CH3)2 3 2 1 6 5 4 Thymol (2-isopropyl-5-methylphenol) HO CH3 CH(CH3)2 3 2 1 6 5 4 Carvacrol (5-isopropyl-2-methylphenol) OCH3 C O H OH 3 2 1 6 5 4 Vanillin (4-hydroxy-3-methoxybenzaldehyde) 680 PHENOLS Back Forward Main Menu TOC Study Guide TOC Student OLC MHHE Website