Concept explainers
(a)
Interpretation:
Given the each set of compounds whether it is a hemiacetal or neither should be identified.
Concept Introduction:
Addition reaction: Addition of an alcohol or other organic compound to the carbon double bond to give a carbon-oxygen single bond.
Hemiacetal: A compound with both an alcohol like (-OH) group and ether like (-OR) group bond to the carbon atom was at one time the
Acetal formation: The small amount of acid catalysts is added to the reaction of an alcohol with an aldehyde or ketone, the hemi-space initially formed is converted into an acetal or a ketal substitution reaction.
(b)
Interpretation:
Given the each set of compounds whether it is a hemiacetal or neither should be identified.
Concept Introduction:
Addition reaction: Addition of an alcohol or other organic compound to the carbon double bond to give a carbon-oxygen single bond.
Hemiacetal: A compound with both an alcohol like (-OH) group and ether like (-OR) group bond to the carbon atom was at one time the aldehyde carbonyl carbon.
Acetal formation: The small amount of acid catalysts is added to the reaction of an alcohol with an aldehyde or ketone, the hemi-space initially formed is converted into an acetal or a ketal substitution reaction.
(c)
Interpretation:
Given the each set of compounds whether it is a hemiacetal or neither should be identified.
Concept Introduction:
Addition reaction: Addition of an alcohol or other organic compound to the carbon double bond to give a carbon-oxygen single bond.
Hemiacetal: A compound with both an alcohol like (-OH) group and ether like (-OR) group bond to the carbon atom was at one time the aldehyde carbonyl carbon.
Acetal formation: The small amount of acid catalysts is added to the reaction of an alcohol with an aldehyde or ketone, the hemi-space initially formed is converted into an acetal or a ketal substitution reaction.
(d)
Interpretation:
Given the each set of compounds whether it is a hemiacetal or neither should be identified.
Concept Introduction:
Addition reaction: Addition of an alcohol or other organic compound to the carbon double bond to give a carbon-oxygen single bond.
Hemiacetal: A compound with both an alcohol like (-OH) group and ether like (-OR) group bond to the carbon atom was at one time the aldehyde carbonyl carbon.
Acetal formation: The small amount of acid catalysts is added to the reaction of an alcohol with an aldehyde or ketone, the hemi-space initially formed is converted into an acetal or a ketal substitution reaction.
Want to see the full answer?
Check out a sample textbook solutionChapter 15 Solutions
Pearson eText Fundamentals of General, Organic, and Biological Chemistry -- Instant Access (Pearson+)
- Hypoglycin A, an amino acid derivative found in unripened lychee, is an acutely toxic compound that produces seizures, coma, and sometimes death in undernourished children when ingested on an empty stomach. (a) Draw the neutral, positively charged, and negatively charged forms of hypoglycin A. (b) Which form predominates at pH = 1, 6, and 11? (c) What is the structure of hypoclycin A at its isoelectric point?arrow_forwardGiven ß- Cyclodextrin, Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a)Barfoed’s test (b)Seliwanoff’s test (c) Iodine’s testarrow_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_forward
- Assume that the mixture of substances in drawing (a) undergoes a reaction. Which of the drawings (b)–(d) represent a product mixture consistent with the law of conservation of mass?arrow_forwardGiven ß- Cyclodextrin Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a) Molisch’s test (b)Fehling’s test (c) Bial’s testarrow_forwardGiven Tagatose, Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a)Barfoed’s test (b)Seliwanoff’s test (c) Iodine’s testarrow_forward
- Hypoglycin A, an amino acid derivative found in unripened lychee, is an acutely toxic compound that produces seizures, coma, and sometimes death in undernourished children when ingested on an empty stomach ( ✓ Problem 5.60). (a) Draw the neutral, positively charged, and negatively charged forms of hypoglycin A. (b) Which form predominates at pH = 1, 6, and 11? (c) What is the structure of hypoclycin A at its isoelectric point? OH NH2 hypoglycin Aarrow_forwardCompound A undergoes a reaction with hydrogen bromide, HBr to produce2-bromobutane. A exists as cis-trans isomers and decolourises brominesolution in methylene chloride, CH2Cl2. a)Draw and name the structure of compound D. b)Draw two (2) constitutional isomers of compound Darrow_forwardOne or more of the compounds shown below will satisfy each of the following statements. Not all compounds may be used; some may be used twice. Put the number(s) in the blank. (1) Found in chitin. (2) An L-saccharide. (3) The first residue attached to asparagine in N-linked glycans. (4) A uronic acid. (5) A ketose. CH,OH CoO COO OH H H H H ОН Н но OH OH H OH H HO OH H NHC- CH, Oso, OH (a) (b) (c) CH,OH CH,OH CH,OH C=0 CHOH C=0 H-C- OH CH,OH но -с-н ČH,OH CH,OH (d) (e)arrow_forward
- (i) MnO is basic whereas Mn207 is acidic in nature. Why? (ii) Transition metals form alloys. Why? (iii) Complete the following equation: 2MnO4 + 4KOH + O2 ———>arrow_forwardGiven Tagatose, Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a) Molisch’s test (b)Fehling’s test (c) Bial’s testarrow_forward(a) Draw the structure of ninhydrin. (b)Write the complete equation for its reaction with amino acids. (c) What is the substance responsible for the purple colour produced upon reaction of ninhydrin with an amino acid?arrow_forward