Identify the most likely sequence of steps in the mechanism of methyl bromide, which is widely used as a fumigant to prevent the spread of diseases and pests in agricultural products?
1) Step 1: Reaction with water to form hydrobromic acid and methanol. Step 2: Reaction with proteins and enzymes in pests and pathogens, leading to their inactivation. Step 3: Diffusion into the cells of pests and pathogens, disrupting their cellular processes.
2) Step 1: Diffusion into the cells of pests and pathogens, disrupting their cellular processes. Step 2: Reaction with proteins and enzymes in pests and pathogens, leading to their inactivation. Step 3: Reaction with water to form hydrobromic acid and methanol.
3) Step 1: Reaction with proteins and enzymes in pests and pathogens, leading to their inactivation. Step 2: Diffusion into the cells of pests and pathogens, disrupting their cellular processes. Step 3: Reaction with water to form hydrobromic acid and methanol.
4) Step 1: Diffusion into the cells of pests and pathogens, disrupting their cellular processes. Step 2: Reaction with water to form hydrobromic acid and methanol. Step 3: Reaction with proteins and enzymes in pests and pathogens, leading to their inactivation.