Propose a molecular formula for rose oxide, a rose-scented compound isolated from roses and geraniums, which contains the elements of C, H, and O, has two degrees of unsaturation, and a molecular ion in its mass spectrum at m/z = 154.

Compound C shows a molecular ion at m/z 148 and other prominent peaks at m/z 105 and 77. Following are its infrared and 1H-NMR spectra. Q.) Account for the appearance of peaks in its mass spectrum at m/z 105 and 77.

Propose the molecular formula for a compound that exhibits the following peaks in its mass spectrum (a) (M)+•      m/z = 60     relative height = 65.0 % of the base peak (b) (M+1)+• m/z = 61     relative height = 2.15 % of the base peak   Question 46 options:   C4H6   C4H4O   C2H6O   C7H12   C3H8O

22. Propose a molecular formula that fits the given data:       A compound that absorbs IR radiation at 1720 cm−1 and exhibits a molecular ion peak at m/z = 70.