DAT Ochem reactions

[lilchinoboy03]

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I'm worried about what we need to assume for certain ochem reactions. For example, if the reaction is a nitration of a nitrobenzene. Obviously the major product is nitration of the meta. But would there ever be a time where one of the answer choices is mononitration at the meta (so 2 nitro groups meta directed), and another answer has 3 nitro groups all meta directed? Would they do that to us? Then the major mononitration is the first, but I guess if the reaction continued it would nitrate the remaining meta position as well. Has anybody seen this on the test where you would need to discriminate this?

Or another example, let's say we have a methyl grignard reagant attacking an acyl chloride. so first the chloride is replaced so you get some type of ketone right? but if another grignard methyl attacks, we'll get a tertiary alcohol right? so my question, would both choices ever be available? and if so, would we take it all the way and the tertiary alcohol be the best answer?

 

[lilchinoboy03]

Anyone have any input on this?

 

[greenbean4606]

Well I haven't taken the test yet, but my guess on the first question would be, if that happened, the best answer would be the single-nitrated product since Nitro groups are deactivating.

For your second question, if the question states 2 equivalents of the methyl grignard then you would add it twice and get the ketone, otherwise just once.

 

[lilchinoboy03]

Well I haven't taken the test yet, but my guess on the first question would be, if that happened, the best answer would be the single-nitrated product since Nitro groups are deactivating.

For your second question, if the question states 2 equivalents of the methyl grignard then you would add it twice and get the ketone, otherwise just once.

i thought if it doesn't specify 1 equivalent, you assume theres more?

anyone whose taken the test that can clarify?