(a)
Interpretation:
The line structure of thiol should be drawn.
Concept Introduction:
Thiols:
The general structure of thiol is
The arrangement of the atoms is explained by the graphical representation of molecular structure of chemical compound.
(b)
Interpretation:
The disulfides should be drawn from the oxidation reaction of 2-pentanethiol.
Concept Introduction:
Thiols:
The general structure of thiol is
Oxidation of thiols:
Thiol undergoes oxidation using
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EP FUND.OF GENERAL,ORG...-MOD.MASTERING
- Identify the acid on the left and its conjugate base on the right in the following equations:(a) HOCl + H2O ↔ H3O+ + OCl-(b) HONH2 + H2O ↔ HONH3+ + OH-(c) NH4+ + H2O ↔ NH3 + H3O+(d) 2HCO3-2 ↔ H2CO3 + CO3-2 (e) PO4-3 + H2PO4- ↔ 2HPO4-2arrow_forwardIDENTIFY THE FUNCTIONAL GROUP PRESENT IN THESE COMPOUNDS. A = ? B = ? C = ?arrow_forwardb) Determine which ionization state corresponds to aspartic acid (shown below) at pH 1, 7, and 10 by selecting the most suitable answer from the statements i-iv. The pK of the amine, carboxylic acid, and side chain of aspartic acid are 9.6, 1.88 and 3.65, respectively. ОН ÓH ÑH2 i) the amine is charged; the carboxylic acids are neutral. ii) the amine and carboxylic acids are all charged. iii) the amine is neutral, and the carboxylic acids are charged. iv) the amine and the carboxylic acids are all neutral. pH Statement (i, ii, iii, or iv) 1 7 10 %3Darrow_forward
- Uronic acids are another class compound for carbohydrates. a) Describe the structural difference between glucose and glucouronic acid (in either the Fischer or Haworth form) b) Describe the saccharide units and glycosidic bonding found in hyaluronic acid.arrow_forwardFor A, B, C, D, E, F, identify the circled functional groups and linkages in the compound in the picture.arrow_forwardSalicylic acid (o-hydroxybenzoic acid) is used as starting material to prepare aspirin. Draw the structure of salicylic acid.arrow_forward
- Glycine hydrochloride (Cl− H3N+CH2COOH) is a diprotic acid that contains a carboxylic acid group and an ammonium group and is therefore called an amino acid. It is often used in biochemical buffers. Solve, In analogy with Figure , sketch the titration curve of this diprotic acid.arrow_forwardFor the first part, draw a Fischer projection formula for the enantiomer of each of the following monosaccharides. For the second part, identify whether the images are in D- or L-configuration. Write your answers first on a piece of bond paper.arrow_forwardSpermaceti, a fragrant substance isolated from sperm whales, was commonly used in cosmetics until it was banned in 1976 to protect the whales from extinction. Chemically, spermaceti is cetyl palmitate, the ester of palmiticacid with cetyl alcohol (the straight-chain 16-carbon alcohol). Draw the structure of spermaceti.arrow_forward
- If Taxol (see Problem ) has a specific rotation of -49°, then what is the specific rotation of its enantiomer?arrow_forwardThe linear tripeptides are formed from the following three amino acids as the starting materials in the condensation reaction. Select the correct statement: (a) There are 27 possible tripeptides and among them, 13 tripeptides are optically active. (b) There are 26 possible tripeptides and all are optically active. (c) There are 27 possible tripeptides and among them, 26 tripeptides are optically active. (d) There are 26 possible tripeptides and among them, 15 tripeptides are optically active.arrow_forwardSalol, the phenyl ester of salicylic acid, is used as an intestinal antiseptic. Draw the structure of phenyl salicylate.arrow_forward