Problem 4 IR Spectrum (liquid film) 4000 3000 2000 1600 1200 800 V (cm1) Mass Spectrum 107/109 No significant UV absorption above 220 nm M** 186/188/190 40 80 120 160 200 240 280 m/e % of base peak 27

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UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.