Question

Write the correct name for each compound below.

1. H3C-CH3:
2. H3C-CH2-CH2-CH2-CH2-CH2-CH2-CH=CH2:
3. H-C≡C-H:
4. H-C-(CH3)3:
5. H3C-CH=CH-CH3:

Answer 1

H3C-CH3 : ETHANE

H3C-CH2-CH2-CH2-CH2-CH2-CH2-CH=CH2 : NON-1-ENE

H-C $\equiv$ C-H : ETHYNE

H-C-(CH3)3 : (OR) CH3-CH(CH3)-CH3 : 2-METHYLPROPANE

H3C-CH=CH-CH3 : BUT-2-ENE

Note:

* Select longest possible C-C continuous chain as parent chain.

To indicate the number of carbons in the parent chain use root word.

No.of carbons in the parent chaine	Root word
1	meth
2	eth
3	prop
4	but
5	pent
6	hex
7	hept
8	oct
9	non
10	dec

* For saturated compound use 'an' as primary suffix, unsaturated compound having double bond, use 'en' as primary suffix and for unsaturated compound having triple bond, use 'yn' as primary suffix.

* Use 'e' as secondary suffix for the compound having no functional group.

* Name the substitutents as prefix to the root word