For each compound determine whether the two labeled hydrogens (a and b) are magnetically equivalent or non-equivalent.

CAN PICK MORE THEN ONE ANSWER! PLEASE BE SPACIFIC IN THE ANSWER (Example: "It's A") WILL RATE, THANK YOU!

2. Draw structures for compounds that have the proton nmrs described: a) C2H6O; one singlet b) CAH&Cl2O; two triplets c) CAHBO2; one singlet, one triplet and one quartet

11. (a) Compound A with molecular formula C10H17NO has the following 'H NMR spectra. Identify the compound and assign & values for each proton. PPM

1. How would use IR spectroscopy to distinguish between the following compounds? AAAA N(CH₂) (CH3)C (CH3)C CH₂OH (CH₂)₂C B C OH (CH₂)₂C D NH₂

3. Vanillin is one of the components of natural extract from vanilla bean. Draw what you would expect the infrared spectra of vanillin to look like, make sure to include labels for peaks and axes. **Would you expect the IR spectra of ethyl vanillin (-OEt instead of -OCH3 group) to look different? H,CO. HO 0 wavenumber cm H

Rank the compounds A, B,  and C in order of increasing frequency of the carbonyl absorption in their IR spectra. Write down the approximate IR frequency of the carbonyl group in each case.

(b) In the IR spectrum of the product, which signals are due to the carbonyl and the alkene? NMR dibenzalacetone (expanded) 2 NMR diberzalacetone lancre this peak Ignore this peak 6 Ignore this peak PPM

A compound containing one functional group has a strong IR absorption band in the 1650-1800 cm region. Which substance is suggested by this information? A) hexan-2-one B) hexan-3-ol C) hex-1-ene D) hexane

Identify the structures of each compound from the given data.