I know you are unable to draw things on this website, but I am in desperate need for help and was wondering if someone would be able to guide or help me.
I need to draw and assign the expected proton NMR spectra for the following compounds and show splitting.
since you can't draw, I was wondering if you could check over where my peaks are and if there is splitting.
1. 2,5-dimethyl-2,4-hexadiene
I had three unique H's
6-H singlet at 1.2
6-H singlet at 1.5
and 2-H doublet at 5.5
2. 1-phenyl-2-methylpropane
I had four unique H
6-H doublet at 1.5
1-H with 7 splits at 1.6
2-H doublet at 2.5
and 5-H singlet at 7.5
3. CH3N(CH2CH3)2
I had two unique H
6-H triplet at 1.5
7-H with 4 splits at 2.3
THANK YOU SO MUCH, any help is greatly appreciated
I can certainly help you check your expected proton NMR spectra. Please keep in mind that without a visual representation, it may be difficult to confirm the exact positions of the peaks or the splitting patterns. However, I can give you some guidance based on the information you provided.
1. 2,5-dimethyl-2,4-hexadiene:
You mentioned three unique hydrogen (H) atoms in this compound.
- 6-H singlet at 1.2: A singlet suggests that this hydrogen is not coupled to any nearby hydrogen atoms.
- 6-H singlet at 1.5: Similarly, this singlet indicates that this hydrogen is not coupled to any nearby hydrogen atoms.
- 2-H doublet at 5.5: The presence of a doublet indicates that this hydrogen is coupled to one nearby hydrogen atom. The peak splitting pattern suggests that the neighboring hydrogen atom is likely giving rise to this splitting.
Based on your description, the spectrum seems reasonable.
2. 1-phenyl-2-methylpropane:
You mentioned four unique hydrogen (H) atoms in this compound.
- 6-H doublet at 1.5: This doublet indicates that this hydrogen is coupled to one nearby hydrogen atom.
- 1-H with 7 splits at 1.6: The presence of seven splitting peaks suggests that this hydrogen is coupled to seven nearby hydrogen atoms. This coupling pattern corresponds to a heptet.
- 2-H doublet at 2.5: Similar to the 6-H peak, this doublet suggests coupling to one nearby hydrogen atom.
- 5-H singlet at 7.5: A singlet indicates that this hydrogen is not coupled to any nearby hydrogen atoms.
The spectrum seems reasonable based on your description.
3. CH3N(CH2CH3)2:
You mentioned two unique hydrogen (H) atoms in this compound.
- 6-H triplet at 1.5: The presence of this triplet indicates that this hydrogen is coupled to two nearby hydrogen atoms. The splitting pattern suggests that those two hydrogens are likely chemically equivalent. The coupling constant (distance between the peaks) can help identify the nature of neighboring hydrogens.
- 7-H with 4 splits at 2.3: The four splitting peaks imply coupling to four nearby hydrogen atoms. This splitting pattern corresponds to a quartet.
Based on your description, the spectrum seems reasonable.
Please note that the exact positions, intensities, and splitting patterns may vary depending on the specific chemical environment, so it is always a good idea to consult reference spectra or chemical literature for accurate information.