Interpretation:
The stereochemical formulas of the products obtained for the given reactions are to be written.
Concept introduction:
Electrophiles are electron-deficient species, which has positive or partially positive charge. Lewis acids are electrophiles, which accept electron pair.
Nucleophiles are electron-rich species, which has negative or partially negative charge. Lewis bases are nucleophiles, which donate electron pair.
Substitution reaction: A reaction in which one of the hydrogen atoms of a hydrocarbon or a functional group is substituted by any other functional group is called substitution reaction.
Elimination reaction: A reaction in which two substituent groups are detached and a double bond is formed is called elimination reaction.
Addition reaction: It is the reaction in which unsaturated bonds are converted to saturated molecules by the addition of molecules.
The compounds that have the same molecular formula of atoms but the structure of the compounds are different for the positions of atoms are called isomers.
In double bond or cyclic compounds, if two same
If the two functional groups are present on the different sides of the double bond or cyclic compound, the given compound can be labeled as Trans.
Cis-trans isomerism exists in the compounds in which similar groups are present on the adjacent carbon atoms.
The molecules that are nonsuperimposable or not identical with their mirror images are known as chiral molecules.
The stereoisomers that are nonsuperimposable on each other and not mirror images of each other are known as diastereomers.
The achiral compounds in which plane of symmetry is present internally and consists of chiral centres are known as meso compounds, but they are optically inactive.
Enantiomers are stereoisomers whose molecules contain nonsuperimposable mirror images.
A chiral molecule is one that has a nonsuperimposable mirror image and an achiral molecule is one that has a superimposable mirror image.
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Chapter 8 Solutions
Organic Chemistry
- Provide concise syntheses for each of the following compounds starting from but-1 - ene. The source of all the carbon atoms in these molecules must be either but-1 - ene or any one carbon nucleophile/electrophile. (If you must use a reagent that has more than one carbon atoms you must show the preparation of that reagent from but-1 - ene.) (a) Methyl propanoate (b) 3, 5- Dimethylheptan-4-one (c) 5-ethyl-7-methylnon-4-enearrow_forwardDraw the structural formula(s) for the major product(s) of each of the following reactions. Unless required, ignore stereochemical details.arrow_forwardIdentify the major product(s) of the following reactions. Include stereochemistry. (a) (b) (c) Br NaOEt NaOEt NaOEtarrow_forward
- (a) (b) (c) Suggest a synthesis of the following alkene (A) using a Wittig reaction strategy. Draw the starting material(s), key reagent and a full reaction mechanism including an explanation of the observed geometry. Which of the following (B) and (C) will favour the enol form? Briefly explain your reasoning. Predict the product(s) and provide a mechanism for each of the following transformations: (i) (ii) OMe OMe Base OEt NaOEtarrow_forwardUsing hex-1-ene as your starting material, show how you would synthesize the following compounds. (Once you haveshown how to synthesize a compound, you may use it as the starting material in any later parts of this problem.)(a) 1,2-dibromohexanearrow_forwardPredict the product(s) and show the complete electron-pushing mecha- nism for each of the following dissolving metal reductions. (a) H3CC=CCH₂CH3 (b) (c) CECH 1844 Li NH3 ND3 C=C—CH3 NH3arrow_forward
- Show how you might use a nucleophilic substitution reaction of 1-bromopropane to synthesize each of the following compounds. (You may use any other compounds that are necessary.)arrow_forwardPredict the major product or the necessary reagent or reactant to complete each of the following reactions. In the box before each reaction, indicate the mechanism followed by the reaction. (Free radical (FR), SN2, SN1). (b) (a) Cl₂ CH₂CH₂OH (a) 1 hv 2 (b) H Br H₂O Na+ SCH3 (c) (d) CI "CH3arrow_forwardPredict the major organic product of each of the following reactions or provide the reagent needed to complete each transformation.arrow_forward
- (a) Compound A is an optically active alcohol. Treatment with chromic acid converts A into a ketone, B. In a separate reaction, A is treated with PBR3, converting A into compound C. Compound C is purified, and then it is allowed to react with magnesium in ether to give a Grignard reagent, D. Compound B is added to the resulting solution of the Grignard reagent. After hydrolysis of the initial product (E), this solution is found to contain 3,4-dimethylhexan-3-ol. Propose structures for compounds A, B, C, D, and E.arrow_forwardPredict the major products of the following reactions, including stereochemistry where appropriate. (a) potassium tert-butoxide + methyl iodide (b) sodium methoxide + tert-butyl iodidearrow_forwardWhen tert-butyl bromide is heated with an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. (a) What happens to the reaction rate if the concentration of ethanol is doubled?arrow_forward
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