Homework Answers
2) A proton attached to Electronegative atom, will have less
electron density around it due to withdrawing effect of
Electronegative atom and thus it is more exposed to external field
and appear as downfield or high 
value.
Since in B and E, circled protons are directly attached to oxygen thus they absorb at downfield as compared to A,C and D.
But in B), carbon of circled proton is attached to more carbons as compared in E) hence it hold electrons more tightly due to which electron density on proton is less than in E). Thus, circled proton in B is most downfield.
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2. Which of the circled protons in the molecules below would absorb furthest downfield in the NMR? condone and open...
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A. В. С. D. 2. Which of the circled protons in the molecules below would absorb furthest downfield in the NMR? 2 A. В. с. CH,CосHIсн,, CH,сCH, сн, CH,СCH сH) D. E. CH,ссH,) CH Cосн) B-directly attached to the electronegative atom O, but also more crowded than E 3. List the most common NMR reference. 2 pts A. Water B. Methylene chloride C. Dimethyl sulfoxide D. Carbon tetrachloride E. Tetramethylsilane
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2. Use resonance structures to predict which of the circled resonances would be upfield/downfield in the 1H NMR spectra of the following compounds. Circle the resonance (A or B) that produces the most downfield chemical shift. B > AHO CH3 ŽI --I- I I I PI 3. Show the splitting trees for the resonances of the protons circled below and predict the line patterns in the resonances. HTCH IHO - Η ΚΗ H 3Jtrans = 15.7 Hz, 3Js-bond = 6.3...
Which of the indicated protons in the compound shown below will appear the most downfield in...
Which of the indicated protons in the compound shown below will appear the most downfield in the H NMR spectrum? D. IV How many signals would you expect in the H NMR spectrum of the compound shown below? A. 4 B. 5 C. 6 D. 7
Please answer with full written out step-by-step analysis! :-) Which of the molecules below would absorb...
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A. В. С. D. 2. Which of the circled protons in the molecules below would absorb furthest downfield in the NMR? 2 A. В. с. CH,CосHIсн,, CH,сCH, сн, CH,СCH сH) D. E. CH,ссH,) CH Cосн) B-directly attached to the electronegative atom O, but also more crowded than E 3. List the most common NMR reference. 2 pts A. Water B. Methylene chloride C. Dimethyl sulfoxide D. Carbon tetrachloride E. Tetramethylsilane
2. Use resonance structures to predict which of the circled resonances would be upfield/downfield in the 1H NMR spectra of the following compounds. Circle the resonance (A or B) that produces the most downfield chemical shift. B > AHO CH3 ŽI --I- I I I PI 3. Show the splitting trees for the resonances of the protons circled below and predict the line patterns in the resonances. HTCH IHO - Η ΚΗ H 3Jtrans = 15.7 Hz, 3Js-bond = 6.3...
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Please answer with full written out step-by-step analysis!
:-)
Which of the molecules below would absorb light with the longest wavelength in the visible part of the spectrum? Why? Hint: Follow the link below the picture; you can also search for UV/vis spectra of these molecules Naphthalene Tetracene
6) The compound that can undergo self-condensation in the presence of NaOMe in MeOH Part 1: [20 marks] Select the best answer for each of the following: 1) Circle the species that is aromatic: [0][0] [] [O] 7) The most acidic compound Ola Tyra oko sya om ugungano 2) Circle the structure that has a heteroatom lone pair in the aromatic pi electron system 8) Each of the following disubstituted aromatics shown below is nitrated. In which of these cases...
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The IR/spectrum shows the value, 1st photo shows the
instructions.
Attached are 2 sets of spectra. Each set is worth 25 points. Not all sets have a Mass Spectrum, but do have information that was obtained from MS and some sets do not have a "C-NMR and don't really need one. Look at each spectrum individually and clearly list and comment on the structural Characteristics you can determine from that spectrum. (Chemical shifts, splitting patterns, coupling constants, fragmentation patterns, absorption...
please help in all sections asap!!
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