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The chirality of the compound...

The chirality of the compound

A

R

B

S

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Z

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E

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Answer the following questions : (i) What is meant by chirality of a compound ? Give an example . (ii) Which one of the following compounds is more easily by hydrolyzed by KOH and why ? CH_(3)CHClCH_(2)CH_(3) or CH_(3)CH_(2)CH_(2)Cl

underset(H_(2)O)overset(Br_(2))to (A), number of chiral centre in compound (A) is

p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound B. the latter on acidic hydrolysis gives chiral caboxylic acid. The structure of the carboxylic acid is

No of chiral carbon in compound B

Number of chiral center of the given compound:-

On monochlorination of 2-methylbutane, the total number of chiral compound formed is :

Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :

When H_(2) is added to two isomeric alkenes A and B having molecular formula C_(5)H_(9)Cl , A gives optically inactive compound while B gives a chiral compound. The two isomers are

Compound which rotates the plane polarised light is known as optically active compound . On the basis of direction of rotation two forms of an optically active compounds are termed as dextro and laevo rotatory . The two are termed as enantiomers . If we have a 1 : 1 mixture of d and l isomers of a given chiral compound , optical rotation of such mixture is zero Such a mixture is optically inactive and is called a recemic modification. The net specific rotation of any mixture of the d and isomers of a given chiral compound is equal to the weighted average of the rotations due to both the isomers Mathematically if can be expressed as : [alpha]_(net) =f_(d) [alpha_(d)] + f_(1) [alpha_(l)] Where f_(a) and f_(l) are fractions of d and l isomers respectively and [alpha_(d)] , [alpha_(l)] are their specific rotations The pure d isomer of certain chiral compound has [alpha]_(d)^(25) =+ 55^(@) .A non racemic mixture of this compound has a net [alpha]_(d)^(25) =- 11^(@) . What is the fractions of this isomer in mixture ?

What is meant by chirality of molecules ?

AAKASH INSTITUTE ENGLISH-HALOALKANES AND HALOARENES -ASSIGNMENT SECTION - C
  1. For the following: (a) I^(-) (b) Cl^(-) (c) Br^(-) The ...

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  2. Which of the following undergoes nucleophilic substitution exclusively...

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  3. The chirality of the compound

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  4. C(5)H(11)Br+ NaCN rarr A overset(H(3)O^(+))(rarr) B + "NaOH" overset("...

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  5. CD(2) = CH - CH(2) - Br is subjected to S(N)1 and S(N)2 reactions sepa...

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  6. In Finkelstein reaction when acetone is replaced by water then

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  7. Write brief notes on the following:(iii) Enzyme catalysis

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  8. Which will undergo fastest S(N)2 substitution reaction when treated wi...

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  9. Given reaction Y in the reaction is

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  10. Which one of the following alkyl bromides undergoes most rapid solvoly...

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  11. Monobrominaton of 2-methylbutane gives how many distinct isomers ?

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  12. When CH(3)CH(2)CHCl(2) is treated with "NaNH"(2) the product formed is...

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  13. Grignard reagent is prepared by the reaction between:

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  14. The following reaction is described as

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  15. 2-Bromopentane is heated with potassium ethoxide in ethanol. The majo...

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  16. Which of the following compounds is not chiral ?

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  17. An organic compound A(C(4)H(9)Cl) on the reaction with Na/diethly ethe...

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  18. Reactivity order of halides for dehydrohalogenation is : -

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  19. CH3CH2Cloverset(NaCN)to Xoverset(Ni//H2)to Yunderset("anhydride")overs...

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  20. Which of the following is least reactive in a nucleophilic substitutio...

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