Match the reactions in List-I with the features of their products in List-II and choose the correct option
List-I List-II (P) (-)-1-Bromo-2-ethylpentane 
(single enantiomer) (1) Inversion of configuration (Q) (-)-2-Bromopentane 
(single enantiomer) (2) Retention of configuration (R) (-)-3- Bromo-3-methylhexane 
(single enantiometer) (3) Mixture of enantiomers (S) 
(single enantiometer)(4) Mixture of structural isomers (5) Mixture of diastereomers
| List-I | List-II | ||
| (P) | (-)-1-Bromo-2-ethylpentane (single enantiomer) | (1) | Inversion of configuration |
| (Q) | (-)-2-Bromopentane (single enantiomer) | (2) | Retention of configuration |
| (R) | (-)-3- Bromo-3-methylhexane (single enantiometer) | (3) | Mixture of enantiomers |
| (S) | (single enantiometer) | (4) | Mixture of structural isomers |
| (5) | Mixture of diastereomers |
Show Hint
(P) Configuration at chiral carbon is same.
P → 2 [reaction does not occur at chiral carbon]
(Q) Configuration at chiral carbon changes.
Q → 1
(R) SN1 → Mixture of enantiomers formed.
R → 3
(S):Refer the Image below
∴ So mixture of diastereomers are formed.
S → 5
The correct Answer is option is (B): P →2; Q→1 ; R →3; S →5
P →1; Q→2 ; R →5; S →3
P →2; Q→1 ; R →3; S →5
P →1; Q→2; R →5; S →4
P →2; Q→4; R →3; S →5
The Correct Option is B
Solution and Explanation
The correct option is (B): P →2; Q→1 ; R →3; S →5
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Concepts Used:
Stoichiometry
Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products, leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of the products can be empirically determined, then the amount of the other reactants can also be calculated.
Stoichiometry helps us determine how much substance is needed or is present. Things that can be measured are;
- Reactants and Products mass
- Molecular weight
- Chemical equations
- Formulas
Stoichiometric Coefficient
The Stoichiometric coefficient of any given component is the number of molecules and/or formula units that participate in the reaction as written.
Mole Ratios
The mass of one mole of a substance in grams is called molar mass. The molar mass of one mole of a substance is numerically equal to the atomic/molecular formula mass.