[问答题]
Compounds
X and
Y have the following structural formulas.
1.The IR spectrum of compound
Y features a signal that is not present in the IR spectrum of compound
X. Using section 26 (section 20- 2025 Syllabus) of the data booklet, state the range of wavenumbers in which this IR signal occurs.
2.The NMR spectrum of compound
X was recorded using electromagnetic radiation with a wavelength of .
The spectrum contains two signals with chemical shifts of 3.47 and 1.21 . The integral of the signal at is set to a value of 1.
(1)State the type of electromagnetic radiation used in this experiment, using section 3 (section 5- 2025 Syllabus) of the data booklet.
(2)Calculate the integral of the signal at .
(3)Suggest two features that would be present in the NMR spectrum of
Y but not in the spectrum of
X, using section 27 (section 21 NS) of the data booklet.
3.The mass spectrum of one of the compounds is shown.
1.State the value of the molecular ion peak.
2.Explain how the identity of the compound can be determined from the peak at = 43, using section 28 () of the data booklet.