10,500 POINTS but ONLY if you answer these 2 questions here by 6:00am Pacific Ti
ID: 831702 • Letter: 1
Question
10,500 POINTS but ONLY if you answer these 2 questions here by 6:00am Pacific Time Zone April 23, 2014! Yes, I can give 10,500 points because I have them! My record and reputation are 100%. If you answer these 2 correctly, I will make up 6 more (simple) questions and give you 1,500 for each, no matter how you answer those! Here are the 2 questions:
1. Please consider each of the following structures (in the attached picture) and explain how you could use IR spectroscopy to differentiate each structure uniquely from the other 7.
2. Also regarding the same picture, please give an explanation as to why the carbonyl group (C=O) in amides absorbs at 1640 cm-1, but in ketones and carboxylic acids the carbonyl group absorbs at 1710 cm-1. Hint: The answer is not immediately obvious! Think critically!
Explanation / Answer
Hey folk! Let's understand the question.
1. It is about IR spectroscopy. Let's visit IR spectroscopy. What is IR spectroscopy
Infrared spectroscopy (IR spectroscopy) is the spectroscopy that deals with the infrared region of the electromagnetic spectrum, that is light with a longer wavelength and lower frequency than visible light.Infrared spectroscopy exploits the fact that molecules absorb specific frequencies that are characteristic of their structure. These absorptions are resonant frequencies. I have pasted the frequency for the typical bonds in organic chemistry.
1, 2, 3,8 are cyclic compounds. What will be common among all
Cyclic hydrocarbons show absorptions in the regions 1600-1585 cm-1 and 1500-1400 cm-1 due to carbon-carbon stretching vibrations in the ring. Bands in the region 1250-1000 cm-1 are due to C
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