Question

2,3 dimethyl hexane contains __${3^ \circ }$,__${2^ \circ }$,__${1^ \circ }$ carbons

Answer 1

Hint: $2,3$ dimethyl hexane is the structural isomer of octane. The structure contains methyl at the second and third positions. We need to identify the primary, secondary, and tertiary carbons according to that.

Complete step by step answer:
We have been given $2,3$ dimethyl hexane which contains six carbons in a single straight chain. The formula for the same is $C{H_3} - CHC{H_3} - CHC{H_3} - C{H_2} - C{H_2} - C{H_3}$
Now we know that the primary carbon or one-degree carbon are those in which the carbon is bonded to the only one other carbon atom.
Secondary carbon or two-degree carbons are those in which the carbon is bonded to two other carbon atoms.
Tertiary carbon or three-degree carbons are those in which the carbon is bonded to three other carbon atoms.
Quaternary carbon or four-degree carbon atoms are those in which the carbon is bonded to four other carbon atoms.
Now the $2,3$ dimethyl hexane contains four primary carbons, two secondary carbons, and two tertiary carbons.
Therefore $2,3$ dimethyl hexane contains four primary carbons, two secondary carbons, and two tertiary carbons.

Additional information:
It is an isomer of octane. Isomers are having similar molecular formulas and different structural formulas. It is a colourless liquid. It is having an odourless character. It is also having a very high density $719\;mg\;m{L^{ - 1}}$.

Note: The given molecule is named according to the rules prescribed according to the international union of pure and applied chemistry. The name of the compound is given according to the carbon atoms in the single straight chain. So the naming is like that of n $2,3$ dimethyl hexane.