CME265 Lecture Notes - Lecture 9: Alkyne, Chch-Dt, Amine
24 Nov 2017
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46 the functional group families have the following characteristic frequencies: Alkanes in simple alkanes the most useful frequency is the c-h stretching at about 2900 cm-1 note that most organic molecules have extensive alkyl portions and so this strong band will show up in most spectra. Alkynes the characteristic peaks are the alkynyl c-h stretching frequency at 3300 cm-1 is usually very easy to spot and the alkynyl c-c stretching frequency which is at about 2200 cm-1 and also easy to spot. 1000-1300 cm-1 but these can be hard to find amide carbonyls occur a little lower than carboxylic acids or esters they are also characterized by the n-h frequencies about 3400 cm-1 (like amines) Problem 2. 6 three bottles of unknown substances (bottles #1, #2 and #3) have been found on the shelf with five loose labels on the shelf around them. The structures on these labels are shown below. An ir is taken of each unknown bottle.
