#1
Here the functional group attached is OH(Alcohol) so we need to use -ol suffix
- There are total 6 carbons in the straight chain .
- Naming should be started from functional group.
- At max there can be 4carbons in the chain then on left hand side
Right hand side is 2 carboned substituent i.e it's ethyl group
Hence the naming is
#2
Start numbering from alcohol towards left end .
- 4 carbons chain
- Pent prefix to be used
The name is
#3
O is at centre and two methyl groups are branched both sides
#4
O is at centre,left side propane ,right side methane
#5
Left side ethane,Centred O,Right side methyl.