(i) Give reasons, with reference to compound structures, for each of the following observations: (i) (ii) The chemical shift value for a hydrogen attached to a benzene ring is greater than 6.0 ppm while that of a hydrogen attached to an alkyne is c. 2.5 ppm. IR spectroscopy alone can clearly distinguish between trimethylamine and (iii) H-NMR clearly distinguishes between propanethiol and propanol. propanamine.

Following are IR and 1H-NMR spectra of compound D. The mass spectrum of compound D shows a molecular ion peak at m/z 136, a base peak at m/z 107, and other prominent peaks at m/z 118 and 59. Q.) Propose structural formulas for ions in the mass spectrum at m/z 118, 107, and 59.

Compounds W and X are isomers. They have the molecular formula C9H8O. The IR spectrum ofeach compound shows a strong absorption band near 1715 cm−1. Oxidation of either compound withhot, basic potassium permanganate followed by acidification yields phthalic acid. The proton NMRspectrum of W shows a multiplet at δ 7.3 and a singlet at δ 3.4. The proton NMR spectrum of Xshows a multiplet at δ 7.5, a triplet at δ 3.1, and a triplet at δ 2.5. Propose structures for W and X.

Draw the structural formulas of the following compounds and indicate the number of NMR signals that would be expected for each compound. (a) methyl iodide (b) 2,4-dimethylpentane (c) cyclopentane (d) propylene (propene)

Suggest structures given the 1H NMR spectra and formulas for each of the compound below. C3H7Cl

Suggest structures given the 1H NMR spectra and formulas for each of the compounds below. C9H10O

The IR and 1H-NMR for a compound with the molecular formula C7H5ClO is given below. Deduce the structure of the compound. Please assign all the appropriate peaks in the 1H-NMR and IR spectra and providing a short narrative describing what structural information each piece of data from both the spectra provided.  I appreciate it, Thank you!

Give the structure that corresponds to the following molecular formula and H1 NMR spectrum:: C7H16O4: δ 1.93 (triplet); δ 3.35 (s); δ 4.49 (triplet); relative integral 1:6:1.

Suggest structures given the 1H NMR spectra and formulas for each of the compounds below. C4H10O

(c) A tri-substituted benzene possessing one bromine and two methoxy substituents exhibit three aromatic resonances at 8 6.40, 6.46, and 7.41 ppm. Identify the substitution pattern.