What is the chemical formula for 2-nitropropane?

The correct chemical formula for 2-nitropropane is represented as CH₃-CH(NO₂)-CH₃. This structure captures that 2-nitropropane is a propyl group (three carbon atoms connected) with a nitro group (NO₂) specifically attached to the second carbon.

The notation makes it clear that there are two methyl (CH₃) groups flanking the carbon that carries the nitro group. In this way, the molecular structure indicates not only the presence of the nitro substituent but also the specific carbon atom to which it is attached.

Understanding the structure and how the functional groups are positioned is crucial in organic chemistry for accurately naming compounds and identifying their properties. Hence, the formulation aligns with the standard conventions of organic nomenclature.