Nhich structure is consistent with the following data? Molecular formula: CHa IR absorptions at -3000, 1600 and 1500 cm 3H singet 3H rpiet 2H trplet 2H S pesks IV O A. V O B. II O C. IV O D. II
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- IR spectroscopy does not distinguish very well betweenisomers I and J. Explain why. How could UV–vis spectroscopy be used to distinguish between themMatch structures I and II to the most appropriate of the 13CNMR spectra shown below2 Determine the structures of ethersfrom their spectra, and explaintheir characteristic absorptions andfragmentations.
- 10) The following spectra correspond to xylenes (dimethylbenzenes) ortho, meta and para. Which corresponds to which?For each structure below, use numbers to indicate chemically equivalent and distinct hydrogens,and make a table showing the predicted integration and multiplicity of each peak cluster.a) which bond is present in alcohols but not alkanes? b) is this band strong or weak (in terms of spectra)? c) what is different about C=O and O-H bonds compared with C=C or C≡C bonds that show weaker signals?
- For each set of spectral data below, draw the skeletal structure of the molecule that is consistent with the data. a. C5H12OMajor IR peaks: 3000 -2850 cm-11H NMR: 1.10 ppm (doublet); 3.60 ppm (septet), 3.8 ppm (quartet), 1.05 ppm (triplet) b. C3H6Br2Major IR peaks: 3000 -2850 cm-11H NMR: 2.4 ppm (quintet) and 3.5 ppm (triplet)For the following InfraRed spectra, identify the existing functional groups. Functional group A is present because of the peak at 3329 cm-1: A is ________________________________________ Functional group B is present because of the peak at 3076 cm-1: B is ________________________________________ Functional group C is present because of the peak at 2113 cm-1: C is________________________________________ Functional group D is present because of the peak at 2113 cm-1: D is( all the spectra are given IR , H1 , 13C plz give structure
- What molecules correspond to IR spectra C and D? Briefly justify (only one molecule per spectrum).a. Rank A-C in order of increasing wavelength absorption. b. Compound C has an absorption that shifts bathochromically when examined inincreasingly polar solvents. What does this tell you about the magnitude and sign of theexcited-state dipole moment relative to the ground-state dipole moment. Explain yourreasoning. c. What is a hyperchromic effectIdentify and draw the structure of the important peaks in the MS spectral data of C7H5BrO3 given below.