Give the Newman configuration of the least staggered form of n-butane. Due to which of the following strain it is destabilized?
Least stable staggered form of $$n-$$ butane is gauche form. Since in this conformation, all the tetrahedral carbons attached to one another have staggered bonds, therefore, it is free from torsional strain. Further, in anti form, the two $$CH_3$$ groups are $$180^o$$ apart but in gauche form they are only $$60^o$$ apart. Therefore, gauche form is less stable than anti-form due to van der Waal strain.
$$ \mu $$ 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 .
a) Draw Newman projection for the less stable staggered form of butane. b) Give reason for the relatively less stability of the staggered form.
Which of the following statements is not true about conformational isomerism ?
What is the relationship between the molecules in the following pairs ?
For the following newman projection
Newman projections P, Q, R and S are shown below: Refer image, Which one of the following options represents identical molecules?