Which of the following compounds can not form iodoform?

Step-by-step solution

The iodoform test is given by compounds containing either a methyl ketone group ( CH₃-CO- ) or a secondary alcohol group with a terminal methyl ( CH₃-CH(OH)- group), as well as ethanol and acetaldehyde. Ethyl methyl ketone ( CH₃-CO-CH₂-CH₃ ) contains a CH₃-CO- group, so it gives a positive iodoform test. Isopropyl alcohol ( CH₃-CH(OH)-CH₃ ) contains a CH₃-CH(OH)- group, so it gives a positive iodoform test. 3-Methyl-2-butanone ( CH₃-CO-CH(CH₃)₂ ) contains a CH₃-CO- group, so it gives a positive iodoform test. Isobu