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23 Nov 2019

For the following formula, C10H14, calculate the IHD...

Then, the type of unsaturation that might be present is....
a. no unsaturation; no multiple bonds or ring closings
b. one double bond or one ring closing
c. three double bonds or three rings closing; or two double bondsand one ring closing; or one double bond and two rings closing; orone triple bond and one double bond;or one triple bond and one ringclosing
d. many possibilities, most likely benzene ring

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Jarrod RobelLv2

18 Jul 2019

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Steps in Spectral Identification

For your report, the following items must be completed: the point-breakdown for each item is also indicated.

Â¨ Use molecular formula to determine degrees of unsaturation: 2 points

IHD = # of (rings + p bonds)

Â¨ Identify major peaks in IR spectrum, if any: 4 points

Use the IR data tables in your lab manual and organic textbook to

determine if there are characteristic signals corresponding to the

various functional groups.

e.g.,

OâH OH single bond stretch

NâH or NâH₂ NH single bond stretch

CÂºCâH terminal alkyne, CH stretch

CÂºC, CÂºN triple bond stretch

HâC=O aldehyde CH stretch

C=O CO double bond stretch

CâO CO single bond stretch

Otherâ¦?

q Speculate on possible functional groups that might be present.

- Deduce structural fragments for each of the ¹H NMR spectral signals.

Usually working upfield (from high to low chemical shift) is

most efficient.

o Explain your reasoning

- Assemble the fragments to construct the molecule.

Â¨ Give the structure of the compound. 2 points

Â¨ Assign the signals in the ¹H NMR spectra to specific protons. 6 points

Â¨ Assign carbons to the peaks in the ¹³C NMR spectrum 6 points

Benzene is an organic chemical compound with the molecular formula C6H6. In the benzene molecule, carbon atoms form a ring with alternating single and double bonds connecting them. Thus, each individual carbon atom forms one ? bond with another carbon atom and one ? and one ? bond with another carbon atom. Each carbon atom also forms one ? bond with a hydrogen atom. Identify which types of orbitals overlap to form the bonds between the atoms in a benzene molecule. Drag the appropriate labels to their respective targets.