Isomerism in Alkanes

What are N and M ?

  

${\mathrm{C}}_2$  is rotated  $\mathrm{120°\hspace{0.17em}}\mathrm{about}\hspace{0.17em}{\mathrm{C}}_2-{\mathrm{C}}_3$ bond. The resulting conformer is

The stable conformer of ethane is

Isomers which can be interconverted through rotation around a single bond are

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CH}}_2$ contains X number of allylic hydrogen and ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_3$ contains Y number of allylic hydrogen.The number of structural isomers of ${\mathrm{C}}_6{\mathrm{H}}_{14}$ are

Which among the following is an isomer of propanol?

The number of primary, secondary, teritary and quanternary carbons in neopentane are respectively

Which of the following is the most preferred conformation of ethane molecule

What is incorrect order of stability?
$\left(\mathrm{I}\right)$
$\left(\mathrm{I}\mathrm{I}\right)$
$\left(\mathrm{I}\mathrm{I}\mathrm{I}\right)$ Boat form of $1,\mathrm{}4-\mathrm{c}\mathrm{y}\mathrm{c}\mathrm{l}\mathrm{o}\mathrm{h}\mathrm{e}\mathrm{x}\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{i}\mathrm{o}\mathrm{l}\mathrm{}>\mathrm{C}\mathrm{h}\mathrm{a}\mathrm{i}\mathrm{r}\mathrm{}\mathrm{f}\mathrm{o}\mathrm{r}\mathrm{m }\mathrm{}\mathrm{o}\mathrm{f }\mathrm{}\mathrm{1,4}-\mathrm{c}\mathrm{y}\mathrm{c}\mathrm{l}\mathrm{o}\mathrm{h}\mathrm{e}\mathrm{x}\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{i}\mathrm{o}\mathrm{l}$
$(\mathrm{I}\mathrm{V})$
$\left(\mathrm{V}\right)$ Gauche form of succine acid > Anti from of succinic acid

What is the minimum number of carbon atoms of an alkane must have to form an isomer?

The conformation of isopentane having maximum torsional and maximum Van der waal strain is

How many conformational isomers of butane are chiral.

An unsaturated hydrocarbon on complete hydrogenation gives 1-isopropyl - 3 - Methyl cyclohexane, after ozonolysis it gives one mole of formaldehyde, one mole of acetone and one mole of acetone and one mole of 2,4-dioxohexanedial. The possible structures of hydrocarbon are

The most stable configuration of succinic acid in Newmann Projection is:

For which of the following molecules, Gauche form is more stable than Anti.

$\mathrm{i}.$ ${\mathrm{H}}_2\mathrm{ }\mathrm{N}-\mathrm{C}{\mathrm{H}}_2-\mathrm{C}{\mathrm{H}}_2-\mathrm{N}{\mathrm{H}}_2$

$\mathrm{i}\mathrm{i}.$ ${\mathrm{H}}_2\mathrm{ }\mathrm{N}\mathrm{ }–{\mathrm{C}\mathrm{H}}_2-{\mathrm{C}\mathrm{H}}_2-\mathrm{C}\mathrm{O}-\mathrm{Z}$

$\mathrm{i}\mathrm{i}\mathrm{i}.$ $\mathrm{H}\mathrm{O}-\mathrm{ }{\mathrm{C}\mathrm{H}}_2-{\mathrm{C}\mathrm{H}}_2-\mathrm{C}\mathrm{O}-\mathrm{Z}$

For which of the following molecules, Gauche form is more stable than Anti.

$\mathrm{i}.$ $\mathrm{M}\mathrm{e}-{\mathrm{C}\mathrm{H}}_2-{\mathrm{C}\mathrm{H}}_2-\mathrm{M}\mathrm{e}$   $\mathrm{i}\mathrm{i}.$ $\mathrm{H}\mathrm{O}-{\mathrm{C}\mathrm{H}}_2-{\mathrm{C}\mathrm{H}}_2-\mathrm{O}\mathrm{H}$
$\mathrm{i}\mathrm{i}\mathrm{i}.$ $\mathrm{H}\mathrm{O}-{\mathrm{C}\mathrm{H}}_2-{\mathrm{C}\mathrm{H}}_2-\mathrm{F}$

For the given Newman projection,




The configuration is

Which of the following will have least hindered rotation about carbon-carbon single bond?

Identify the most stable conformation.

Identify the most stable conformation -