Final answer:
The relationship between two compounds could indicate that they are isomers with the same molecular formula but different structures, or they could be different compounds entirely. Without further specific information about the compounds, a definitive relationship cannot be determined.
Step-by-step explanation:
When evaluating compounds to determine their relationship, we often consider whether they could be isomers or entirely different compounds. Isomers are compounds that have the same molecular formula but different structural formulas or arrangements of atoms within the molecule. A classic example is 1-butene and 2-butene, which both have the formula C4H8 yet differ in the position of the double bond within the carbon chain, making them isomers with distinct physical and chemical properties. A carbon-carbon multiple bond (double or triple bond) is indeed considered a functional group, which plays a significant role in defining the reactivity and properties of the compounds that contain them.
Therefore, two compounds can have the same systematic name if they are identical, but if there are discrepancies in naming, they might be isomers or different compounds entirely. Without more specifics about the compounds in question, it would not be possible to provide a definitive relationship between the two; hence option 3) 'Cannot be determined' would be appropriate, assuming there is no additional context provided.