Unit 5- spectrometry Flashcards
1
Q
what is percentage transmittance
A
how much of a particular frequency gets through the compound, is measured
2
Q
what is resonance frequency
A
natural frequency at which the electrons in bonds vibrate
3
Q
in mass spectrometry, what is detected by the mass spectrometer
A
only charged particles, will be accelerated, deflected and detected- free radicals wont be
4
Q
why might there be a mass spec for ethanol but no peak at 46
A
the molecular ion C2H5OH+ is too unstable so fragments
5
Q
what is a fingerprint
A
fragmentation, provides a set of peaks
6
Q
why might there be a m+1 peak
A
the presence of carbon-13 isotope
7
Q
how to calculate the number of carbon atoms present
A
height of m+1 peak/height of M peak
