Question

Draw the condensed structural formula for each of the following alkanes:

a.$3-ethylpen\tan e$

b.$3-ethyl-2-methylhep\tan e$

c.$4-ethyl-2,2-dimethyloc\tan e$

d.$2-bromopropane$

Short answer

(a) The condensed structural formula for $3-ethylpen\tan e$is ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{CH}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

(b) The condensed structural formula for $3-ethyl-2-methylhep\tan e$is ${\mathrm{CH}}_3-\mathrm{CH}\left({\mathrm{CH}}_3\right)-\mathrm{CH}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

(c) The condensed structural formula for $4-ethyl-2,2-dimethyloc\tan e$is${\mathrm{CH}}_3-\mathrm{C}\left({\mathrm{CH}}_3\right)\left({\mathrm{CH}}_3\right)-{\mathrm{CH}}_2-\mathrm{CH}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

(d) The condensed structural formula for $2-bromopropane$is ${\mathrm{CH}}_3-\mathrm{CH}\left(\mathrm{Br}\right)-{\mathrm{CH}}_3$

Step-by-step solution

Part (a) Step 1: Given information  

We need to find the condensed structural formula for$3-ethylpen\tan e$

Part (a) Step 2: Explanation  

We know that

The condensed structural formula uses the symbol of each element and the bond between them.

Therefore, The condensed structural formula of the given compound is,

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{CH}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Part (b) Step 1: Given information   

We need to find the condensed structural formula for$3-ethyl-2-methylhep\tan e$

Part (b) Step 2: Explanation 

We know that

The condensed structural formula uses the symbol of each element and the bond between them.

Therefore, The condensed structural formula of the given compound is,

${\mathrm{CH}}_3-\mathrm{CH}\left({\mathrm{CH}}_3\right)-\mathrm{CH}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Part (c) Step 1: Given information 

We need to find the condensed structural formula for$4-ethyl-2,2-dimethyloc\tan e$

Part (c) Step 2: Explanation   

We know that

The condensed structural formula uses the symbol of each element and the bond between them.

Therefore, The condensed structural formula of the given compound is,

${\mathrm{CH}}_3-\mathrm{C}\left({\mathrm{CH}}_3\right)\left({\mathrm{CH}}_3\right)-{\mathrm{CH}}_2-\mathrm{CH}\left({\mathrm{C}}_2{\mathrm{H}}_5\right)-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

Part (d) Step 1: Given information 

We need to find the condensed structural formula for$2-bromopropane$

Part (d) Step 2: Explanation   

We know that

The condensed structural formula uses the symbol of each element and the bond between them.

Therefore, The condensed structural formula of the given compound is,

${\mathrm{CH}}_3-\mathrm{CH}\left(\mathrm{Br}\right)-{\mathrm{CH}}_3$