wzorowane1 pktzamkniętetrudne (szac.)
Which compound could produce this mass spectrum? Mass lost (Mr) Possible neutral fragment lost 15 •CH3 18 H2O 28 CH2=CH2 or CO 29 •CH2CH3 or •CHO 45 •COOH A. Butanone B. Butanal C. Butan-1-ol D. Butan-2-ol
Mass spectrometry fragmentation patterns
Deduce structural features of an organic compound from its mass spectrum: the molecular ion peak gives the molar mass and fragment peaks (for example loss of 15 for CH3 or 17 for OH) identify groups, using the fragment table in the data booklet.
Zadania sprawdzające tę umiejętność: 4 Otwórz w wyszukiwarce z filtrami
wzorowane4 pktotwarteśrednie (szac.)
The mass spectrum of carbonyl dibromide is shown below. Bromine has two isotopes, and , of almost equal abundance. (i) Explain the origin of the peaks that appear at m/z values smaller than those of the molecular ion. (ii) Deduce…
wzorowane3 pktotwarteśrednie (szac.)
In the mass spectrum of Y, the molecular ion peak appears at m/z 88. (i) Y contains no multiple carbon–carbon bonds and no rings. Deduce its molecular formula. Use section 7 of the data booklet. Shown below is the high-resolution NMR spectrum of Y,…
wzorowane1 pktzamknięteśrednie (szac.)
The mass spectra of four compounds are shown below. Which is the spectrum of propanal, ? Use section 22 of the data booklet. A. spectrum A B. spectrum B C. spectrum C D. spectrum D