chapter 17 chemistry

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Created on: 18-08-20 10:09

molecular ion peak and equation

clear peak at the highest m/z value to the right,organic compound loses e-to form a positive molecular ion,mass spectrometer detects m/z,m+peak is the last peak on the mass spectrum-needed to find mr/n.o of c atoms=height of M+1 peak/height of M peak

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fragmentation

some molecular ions break down into smaller fragments, which are the other peaks on a mass spectrum, breaks into a positive fragment ion and a radical

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infrared

bond absorb infra red, making them bend and stretch, depends on the mass of the atoms in the bond-heavier vibrate slower, and strength of bond, stronger vibrate faster.

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what are the 2 types of vibration

Bend-changes the bond angle, or stretch-movement along the line between atoms so that the difference between 2 atomic centres increases and decreases

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infrared spectroscopy

a beam of infrared is passed through sample, molecule absorbs some ir frequencies,connceted to computer, dips in graph are peaks, below 1500cm^-1 is the fingerprint region-identify bonds and functional groups

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Other cards in this set

Card 2

Front

fragmentation

Back

some molecular ions break down into smaller fragments, which are the other peaks on a mass spectrum, breaks into a positive fragment ion and a radical

Card 3

Front

infrared

Back

Card 4

Front

what are the 2 types of vibration

Back

Card 5

Front

infrared spectroscopy

Back

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chapter 17 chemistry