100 Med Mar 22 1757 312017 (GMT 08:00) 60 40 3500 4000 Wavenumbers (cm-1 Wed Mar

Question

100 Med Mar 22 1757 312017 (GMT 08:00) 60 40 3500 4000 Wavenumbers (cm-1 Wed Mar 22 17:58:58 2017 (GMT-08:00) FIND PEAKS: Wed Mar 22 17:57:31 2017 (GMT-08:00) Spectrum 4000.00 400.00 Region Absolute threshold: 99.680 Sensitivity. Peak list: Position 758.75 Intensity: 92.296 Position 797.02 Intensity. 70.182 Position: 885.35 Intensity: 41.041 Position: 913.94 Intensity: 79.920 Position 956.500 Intensity 91.653 Position 1015.95 Intensity: 90.245 Position: 1051.24 90.121 Position: 1147.59 Intensity: 88.261 1000

Explanation / Answer

weak band 3083 cm-1 is due alkene CH (C=C-H) streaching

band at 2964, 2916, 2855, 2833 cm-1 is aliphatic CH streaching

band at 1644 cm-1 is due C=C streaching

band at 885 cm-1 is due aliphatic CH bending

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