30. What is the multiplicity of the indicated proton? (a) singlet (b) triplet (c) quartet (d) sextet (e) septet Br Br- a) I b) Il Br H Br Br Br 31. Which of the following structures conforms to the data given below? to c) III d) IV 1 e) V The compound has a molecular formula C4H9CI In the 'H NMR spectrum: Doublet, 8 1.20 ppm (6H) Septet, 8 2.40 ppm (1H) Doublet, 8 3.60 ppm (2H) 11 ||| IV CI of

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NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.