Spectrometry Flashcards
What is fragmentation?
The breaking of a molecule into ions in order for it to be passed through the spectrometer, this can be analysed to differentiate molecules with the same Mr
What is IR spectroscopy?
It is when molecules of multiple atoms absorb IR light at certain wavenumbers
What do dips in a spectra show us?
IR absorption
How do C-H bonds present on a spectra?
They are thick and slightly notched
How are C=C bonds presented on a spectrum?
They are sharp and may have a smaller additional dip next to it
How are C=O bonds presented on a spectrum?
They are shown with a sharp peak besides C=C and is higher in absorption (ie longer peak)
How are O-H bonds of alcohols presented on a spectrum?
They are shown with a smooth broad peak that looks like a whale’s mouth upside down
How are O-H bonds in carboxylic acids are presented on a spectrum?
A mountainous sharp broad peak
When do we use high-res mass spectrometry?
When 2 compounds have the same molecular formula
