CH3-C-NH, CH3-C-NH2 CH3-C=NH2 Largest contributor (#1) Minor contributor (#3) Major contributor (#2) In summary, resonance form C is the best representation of this molecule. However, consid- eration of the other contributing structures, even the minor contributor, helps us to identity positions that are electron-rich (8-) or electron-deficient (8+). 8- - Electron-rich site CH3-C-NH2 8+ 8+ Electron-deficient sites :kill 2.26 For each of the following, draw all significant resonance forms and rank them from most significant to least significant. Briefly explain the rankings. NH (b) (a) (c) H. CH3-C-CEN (e) (d) (f) G. 2.27 In the compounds shown below, the six-membered rings are called benzene rings. Such rings are commonly found in natural products, and we will learn more about the remarkable stahility of these ring systems in Chapter 17. Because of resonance effects with the attache

CH3-C-NH, CH3-C-NH2 CH3-C=NH2 Largest contributor (#1) Minor contributor (#3) Major contributor (#2) In summary, resonance form C is the best representation of this molecule. However, consid- eration of the other contributing structures, even the minor contributor, helps us to identity positions that are electron-rich (8-) or electron-deficient (8+). 8- - Electron-rich site CH3-C-NH2 8+ 8+ Electron-deficient sites :kill 2.26 For each of the following, draw all significant resonance forms and rank them from most significant to least significant. Briefly explain the rankings. NH (b) (a) (c) H. CH3-C-CEN (e) (d) (f) G. 2.27 In the compounds shown below, the six-membered rings are called benzene rings. Such rings are commonly found in natural products, and we will learn more about the remarkable stahility of these ring systems in Chapter 17. Because of resonance effects with the attache

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Section13.SE: Something Extra

Problem 56GP: Long-range coupling between protons more than two carbon atoms apart is sometimes observed when ...

See similar textbooks

Similar questions

Write out the bonds associated with following IRabsorptions. 1200 cm-1 (rounded)
Consider the following three structures and find the best descriptors for stabilising the charges present: A: inductively stabilised (EDG), B: inductively stabilised (EDG), C: inductively (EDG) A: resonance stabilised, B: resonance stabilised, C: inductively stabilised (EDG) A: resonance stabilised, B: inductively stabilised (EWG), C: inductively stabilised (EDG) A: resonance stabilised (EDG), B: resonance stabilised (EWG), C: resonance stabilised (EDG) A: resonance stabilised, B: no stabilising possible, C: no stabilising possible
Q6. Draw resonating contributors’ structure of the following and indicate minor and major contributors:
what structure would be represented HNMR with a singlet at 7.29 being caused by 2 hydrogens and a doublet at 3.88 being caused by 9 hydrogens?
Long-range coupling between protons more than two carbon atoms apart is sometimes observed when bonds intervene. An example is found in 1-methoxy-l-buten-3-yne. Not only does the acetylenic proton, Î—a, couple with the vinylic proton Hb, it also couples with the vinylic proton Hc, four carbon atoms away. The data are: Construct tree diagrams that account for the observed splitting patterns of Î—a, Hb, and Hc.
Assign the stereochemical configuration (E or Z) for the alkene below. Show your work, indicating clearly which groups are assigned high priority (e.g., through assigning the groups numbers, circling only the high priority groups, or labeling groups as high or low).
What is a glysodic bond 1,4 mean and 1,6
4 what is the ftir interpretation of 1-chloro-1-methylcyclohexane?
Draw EI - MS for CH3CH2CH2CH 2BR Explaining your resonance for the peaks show clearly.
at 25C, which of the following reactions of PbS and H2O2 is more favourable?1) PbS + 4H2O2 -> SO2 + PbO2 + 4H2O2) PbS + H2O2 -> PbSO4 + H2O
molecular weight of H2O is 18 but his boilling point 100C, WHY? *
8 Give logical fragmentation reactions to account for the following ions observed in these mass spectra.(a) n-octane: 114, 85, 71, 57 (b) methylcyclohexane: 98, 83 (c) 2-methylpent-2-ene: 84, 69(d) pentan-1-ol: 70, 55, 41, 31