Final answer:
The correct name for the compound in question is dichlorobenzyltributylphosphonium, as it describes a phosphonium ion with two chlorine atoms, a benzyl group, and three butyl groups attached to a central phosphorus atom.
Step-by-step explanation:
The name of the compound dichlorobenzyltributylphosphonium is correct as listed in option 1. This compound contains a benzyl group (a phenyl group attached to a CH2 group), two chlorine atoms, and a phosphonium ion group with tributyl substituents. In naming organic compounds, the suffix phosphonium indicates a positively charged phosphorus atom (a quaternary phosphonium ion), usually associated with four organic groups.
Therefore, when discerning between the options provided:
- Option 1, dichlorobenzyltributylphosphonium, is a phosphonium ion with the specified organic groups.
- Option 2, dichlorobenzyltributylphosphine, would refer to a neutral compound with a trivalent phosphorus atom bonded to three butyl groups and a dichlorobenzyl group, which is not the case here.
- Option 3, dichlorobenzyltributylphosphate, would refer to a compound containing a phosphate group, which is not present in the compound in question.
- Option 4, dichlorobenzyltributylphosphonate, would refer to a compound containing a phosphonate group, which is also not present in the compound in question.
Accordingly, the correct name is dichlorobenzyltributylphosphonium.