Subjective Type

$$ \mu $$ observed = $$ \sum \mu_iX_i $$ where $$ \mu_i $$ is the dipole moment of the stable conformer and $$ X_i $$ is the mole fraction of that conformer. Write the stable conformer for $$ (Z - CH_2 - CH - Z) $$ in Newman's projection. If $$ \mu_{solution} = 1.0\,D $$ and mole fraction of the antiform $$ = 0.82 $$ , find the $$ \mu $$ gauche form .

Solution

Mole fraction of anti-form $$ = 0.82 $$ Mole fraction of gauche form $$ = (1 - 0.82) = 0.18 $$ $$ \mu_{obs} = 1.0 $$ $$ \mu_{obs} = \mu_1 X_1 + \mu_2X_2 $$ $$ 1.0 = \mu (anti) \times 0.82 + \mu(gauche) \times 0.18 $$ $$ \mu(anti) = 0 $$ (from Newman's projection , two Z vectors cancel and all H vectors cancel) $$ 1.0 = 0 \times 0.82 + \mu (gauche) \times 0.18 $$ $$ \mu(gauche) = \dfrac{1.0}{0.18} = 5.55\,D $$

SIMILAR QUESTIONS

Hydrocarbons

a) Draw Newman projection for the less stable staggered form of butane. b) Give reason for the relatively less stability of the staggered form.

Hydrocarbons

Which of the following statements is not true about conformational isomerism ?

Hydrocarbons

Give the Newman configuration of the least staggered form of n-butane. Due to which of the following strain it is destabilized?

Hydrocarbons

What is the relationship between the molecules in the following pairs ?

Hydrocarbons

Newman projections P, Q, R and S are shown below: Refer image, Which one of the following options represents identical molecules?

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