91Ó°ÊÓ

The SMILES notation provided is "CC(C)C". We'll break it down as follows: 1. Each 'C' represents a carbon atom. 2. Parentheses indicate branching. So, we have a total of 4 carbon atoms in the structure, with one branch. Let's build the structure: 1. The first carbon atom (C) is connected to the second carbon atom (C). 2. The second carbon atom (C) is connected to the third carbon atom (C) - branching off from the second carbon atom. 3. The second carbon atom (C) is also connected to the fourth carbon atom (C). Breaking down the SMILES notation, we get the following structure: H | H-C-C-C | C | H Hence, we can see that it is a branched hydrocarbon with one substituent, a methyl group attached to the second carbon atom.

Now, let's identify the IUPAC name for this compound. First, number the carbons in the longest chain: C1 - C2 - C3 The compound is an alkane, so the suffix will be "-ane". The longest straight carbon chain is 3 carbons long, which gives us "propane". Now let's account for the substituent - a methyl group attached to the second carbon atom (C2). Therefore, we have "2-methylpropane". Now, we can compare this IUPAC name with the options provided: (A) Tertiarybutyl (B) Iso-butane (C) Butane (D) Tertiary propane The IUPAC name we derived, "2-methylpropane", can also be referred to as "iso-butane" in common nomenclature. Hence, the correct option is: (B) Iso-butane