A molecule containing which of the following atoms will produce M+• and (M+2)+• peaks of equal intensity?Select answer from the options belowCarbonChlorine Oxygen Bromine Nitrogen
Question
A molecule containing which of the following atoms will produce M+• and (M+2)+• peaks of equal intensity?Select answer from the options belowCarbonChlorine Oxygen Bromine Nitrogen
Solution
The correct answer is Chlorine.
This is because Chlorine has two isotopes, Cl-35 and Cl-37, which are present in approximately a 3:1 ratio in nature. This means that a molecule containing a Chlorine atom has approximately a 50% chance of containing either isotope.
When the molecule is ionized to produce a molecular ion (M+•), it can either lose the Cl-35 isotope or the Cl-37 isotope. This will produce two molecular ion peaks in the mass spectrum, M+• and (M+2)+•, which will be of approximately equal intensity due to the equal likelihood of either isotope being present in the original molecule.
None of the other elements listed have isotopes that are present in such a ratio that would produce molecular ion peaks of equal intensity.
Similar Questions
A molecule containing which of the following atoms will produce a (M+2)+• peak that is approximately equal to the intensity of the molecular ion peak?Select answer from the options belowSulfur NitrogenOxygenBromineChlorine
You are expected to identify which peaks on the mass spectrum of your product?Group of answer choicesThe molecular ion, M + 2, and M + 4 peaks.The peaks corresponding with the molecular ion, minus a bromine atomThe peak corresponding with the molecular ion minus two bromine atomsA, B, and C.
Which of the following compounds will produce a mass spectrum with a molecular ion peak at m/z = 57?Select answer from the options belowCH3CH2CH2NH2CH3CH2CH2OHNone of the choices are correct.butaneSave for LaterSubmit Answer
A compound has a mass spectrum that shows a 1:1 height ratio of its (M)+• peak at m/z = 136 and its (M+2)+• peak at m/z = 138. Which of the compounds below is consistent with this data?Select answer from the options belowCH3CH2CH2OCH2CH2CH2ClNone of the choices are correct.
The ion corresponding to an (M+2)+• peak that is approximately equal to the intensity of the molecular ion peak most likely contains which specific isotope?Select answer from the options below81Br79Br 35Cl37Cl 13C12C
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.