What functional group (t) is are present in following compound? A) 2nd alcohol a

Question

What functional group (t) is are present in following compound? A) 2nd alcohol and alkene B) alkene and 2nd alcohol C) alkyne and 2nd alcohol D) alkyne and 2nd alcohol E) alkyne and 2nd alcohol For the functional group(s) on the following molecule what characteristic IR (s) would be expected (ignoring C-H absorptions)? Absorption? A) Only normal alkane absorptions B) A peak around 2250 cm C) A peak 3300 cm D) A peak around 1700 cm" E) None of these of the IR evidence for the presence c-c would be most difficult to defect in the case of which of these alkenes? An ox containing compound shows strong IR absorption at 1630-1780 cm^4 and 3200-3550 What type of compound is it likely to be? A) An aldehyde B) An ether C) An ketene D) An alcohol E) A carboxylic acid

Explanation / Answer

23. This molecule contains 2o amine (NH is bonded to 2 C residuals) and one -CN or nitrile group. Option A is correct

24. This molecule has an aldehydic functional group, which has a strong absorption around 1700 cm-1 corresponding to carbonyl stretching. Option D is the correct answer

25. In IR spectroscopy, vibrational signals corresponding to symmetric bonds are generally unobservable or weak. Among the options, E is a symmetric molecule (at double bond). Thus double bond may not observe in IR. Option E is the correct answer.

26.A strong peak nearby 1600 means carbonyl group and a broad peak around 3300 means -OH peak. Thus this molecule contains both. ie carboxylic acid as the functional group. Option E is correct

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