## Question

###### I need help on #1 and #2 2. (4 points) The spectrum above was measured on a sample with molecular formula CaH-CIO. I...

i need help on #1 and #2

2. (4 points) The spectrum above was measured on a sample with molecular formula CaH-CIO. In the box in the middle of the spectrum, draw the structure of a compound with this forrmula that is consistent with the spectrum above (there are quite a few structures that would fit). Do not attempt to match the fingerprint region. TRANSMITTANCE 1.001 0.900- 0.800 0.700- 0.600 0.500 0.400 0.300- 0.200 0.100- 0.000 3500 4000 3000 2500 2000 1500 1000 3. (6 points) For each compound below, draw a Newman projection of the lowest energy conformation. Sight down the indicated bond. The front carbon has been drawn for you. Be careful to preserve stereochemistry. н H Н,с снсH-) н н CH3 CнH,сH, сн, HT

## Answers

Molecular formula : C4H CIO Equivalent hydrocarbon Molecular formula : CH12 14-12- unsaturation index = — 2 The peak at - 1760 сm indicate presence of ester group possible structures: 0 lora 6 i ona(H2C)2HC 120° HIGH HACH C(CH3)2 C(CH3)2 HII НС Н | H C (CH3)2 180° HECY HO CH3 H2CH2C CH, не

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