Question

I ran a infrared analysis for the oil in a mandarin. The main components of a mandarin are limonene (74.7%) and y-terpinene (15.7%). How is this represented in the peaks of the infrared. Please be detailed

L ance 4000 3500 3000 2964.57 2917.24 2855 80 2834.02 2500 Wavenumbers (cm-1) 2000 1644 35 1500 1435.69 1375.98 1198 24 1155.04 1051.11 1015.78 956.43 1000 790.99 885.47 758.44

Answer 1

limonone & 2917, 2964 cm & 2834, 2855 cm . 1644 cm . 1435 cmt : • 13.75cm : • Foo-loooem: - terfenere =C-t stretch. Calkere) – CH sp² stretch Calkane) (=c-Stretch Calkene) C-H bending vibrations =(-H bending vibration

The individual amount of components cannot be determined ony byIR. the only thing IR can predict is characteristic vibrational frequencies of functional Groups and some stretching bands which have been explained in the attached pic.