Yes, you can write it like that, but the structural formula is better as it's more detailed.
No it couldn't, as [CH3CH2CH2CH2]+ cannot be formed from CH3CH2COCH2CH3 (in terms of fragmentation), as in pentan-3-one, the oxygen is on the 3rd carbon, but there's no oxygen in [CH3CH2CH2CH2]+.
Yes, you can write it like that, but the structural formula is better as it's more detailed.
No it couldn't, as [CH3CH2CH2CH2]+ cannot be formed from CH3CH2COCH2CH3 (in terms of fragmentation), as in pentan-3-one, the oxygen is on the 3rd carbon, but there's no oxygen in [CH3CH2CH2CH2]+.
So each element (from the molecular ion) has to be present in the cation? And the number of atoms of each element present doesn't matter (as long as there is at least 1 atom of each, and overall it adds up to the peak's M/Z value)?
So each element (from the molecular ion) has to be present in the cation? And the number of atoms of each element present doesn't matter (as long as there is at least 1 atom of each, and overall it adds up to the peak's M/Z value)?
No, sorry, what I wanted to express was that if you split [CH3CH2COCH2CH3]+ in any way, there is no way you can get [CH3CH2CH2CH2]+.