Question

9) (Use the materials you studied in your Readings to generate your answer.) You are given two unlabeled samples for IR analysis. One is halogenated ethane, (XCH2CH3), while the other is a halogenated ethyne, (XC CH) [a compound containing a triple bond). How could IR spectra be used to tell these two compounds apart? Be specific and use wave numbers in your discussion.

Answer 1

The difference between two molecules acn be easily determined by referring peak in the acetylene molecules around 2150 cm-1 as well as sharp peak at 3300 cm-1 .

For details refer photo attached.

Etham. XCH₂ CH3 For ticklogenated If x=cl CH3-CH2-01 = in the range shows absooption 185 – 540cm If & Br in the range then CH3-CH2-By shous abscopsion 650 – 510 cm If x= I in the range CH3 CH2 I shows cabsorption 60o - 485cm af x=F CHS.C-12-F shows absorption at 1400 - 1000cm for c-H strech absorbs in the regin 3300 troom 3000 - 2850cm For X-CEC-H absoobs at 2250 - 2100 cm (srech). it also gives absorpsich at 3300 ml (2 It