Conduct an analysis of the IR and MS of the known compound using the format belo

Question

Conduct an analysis of the IR and MS of the known compound using the format below. This should be straight-forward for the known compound and will serve as a check of the process before you move on to unknowns.

        a.   Molecular weight.

        b.   All possible molecular formulas and degree of unsaturation of each possibility.

        c.   Possible functional groups present from IR analysis, consistent with molecular. formula and degree of unsaturation.

        d. Possible fragments lost from the molecular ion.

        e. Put together the

Explanation / Answer

Mass spec is the separation of species (molecules, atoms, any charged particles) on the basis of their mass to charge ratio. If the charge is one the separation is on atomic mass. So mass spec can be used to measure the molecular weight of a compound. Some structural information is available from the fragment ions that are formed.

Infra red measure the bends, stretches and waggles of a bonds within a molecule when irradiated with infra-red beam of different wavelengths (i.e. energies). From a knowledge of which groups (e.g. -OH or -NH2) waggle at which wavelengths you can work out the structure of the molecule.

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