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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: sparkya10 on December 08, 2009, 12:05:02 AM

Title: Mass spect, IR, and NMR combined problem
Post by: sparkya10 on December 08, 2009, 12:05:02 AM

Hey guys,
I am having some difficulty on this problem and I was wondering if anyone had any suggestions as to what the compound may be. Heres the problem:

A compound shows a mass spectrum whose parent peak is 121 mass
units (notice odd number). Its infrared spectrum shows a band at about 3400
cm-1. The nmr spectrum shows d 1.2, t, 3H; 3.1, q, 2H; 3.5, broad, 1H; 6.6, t, 2H; 6.8,
t, 1H; and 7.2, t, 2H.  The mass spectrum shows a base peak at 106 mass
units.  What is the compound?  What is the 106 mass unit fragment
in the mass spectrum

Title: Re: Mass spect, IR, and NMR combined problem
Post by: lmlh on December 08, 2009, 12:23:27 AM

i think the structure of the compound is N-ethylbenzenamine, 106 mass unit fragment correspond to f molecular ion mass minus methyl