which of the following alkane names is correct?
a)2-methyl-3-propylhexane
b)1-methylnonane
c)1,2-dimethylhexane
d)4,5-dimethylpentane
e)all of the above names are correct
To determine which of the following alkane names is correct, we need to analyze each option separately.
a) 2-methyl-3-propylhexane:
To understand this name, we need to break it down. "2-methyl" signifies that there is a methyl group (CH3) attached to the second carbon atom in the chain. "3-propyl" indicates that there is a propyl group (C3H7) attached to the third carbon atom in the chain. Lastly, "hexane" tells us that the parent hydrocarbon chain contains six carbon atoms. Therefore, this name is correct.
b) 1-methylnonane:
Similar to the previous example, "1-methyl" suggests there is a methyl group attached to the first carbon atom in the chain. "Nonane" means there are nine carbon atoms in the main chain. Consequently, this name is also correct.
c) 1,2-dimethylhexane:
In the given name, "1,2-dimethyl" implies that there are two methyl groups attached to the first and second carbon atoms in the chain. "Hexane" informs us that there are six carbon atoms in the primary chain. Therefore, this name is correct as well.
d) 4,5-dimethylpentane:
Here, "4,5-dimethyl" indicates that there are two methyl groups attached to the fourth and fifth carbon atoms in the chain. "Pentane" signifies that there are five carbon atoms in the main chain. Thus, this name is also correct.
Therefore, option e) "all of the above names are correct" is the correct answer, as all the alkane names listed are accurately described based on the nomenclature system.