The number of hydrogens present in Loratadine, C 22 H ? ClN 2 O 2 , which has four rings and eight double bonds. Concept introduction: Each ring or a double bond in a molecule corresponds to a loss of two hydrogens from the formula of alkane . Hence two hydrogens are to be added for each to arrive at the molecular formula of the parent alkane. Further, if the molecular formula of a compound contains halogens, oxygen and/or nitrogen, then the number of halogens is to be subtracted from the number of hydrogens, the number of oxygens to be ignored and number of the nitrogens is to be added to the number of hydrogens, in arriving at the number of hydrogens. To determine: The number of hydrogens present in loratadine, C 22 H ? ClN 2 O 2 , which has four rings and eight double bonds.

Question

Please draw the structure in the box that is consistent with all the spectral data and alphabetically label all of the equivalent protons in the structure (Ha, Hb, Hc....) in order to assign all the proton NMR peaks. The integrations are computer generated and approximate the number of equivalent protons. Molecular formula: C13H1802 14 13 12 11 10 11 (ppm) Structure with assigned H peaks 2.08 3.13

Answer 1

Question

Chapter 7.SE, Problem 36AP

Interpretation Introduction

Interpretation:

The number of hydrogens present in Loratadine, C₂₂H_?ClN₂O₂, which has four rings and eight double bonds.

Concept introduction:

Each ring or a double bond in a molecule corresponds to a loss of two hydrogens from the formula of alkane. Hence two hydrogens are to be added for each to arrive at the molecular formula of the parent alkane. Further, if the molecular formula of a compound contains halogens, oxygen and/or nitrogen, then the number of halogens is to be subtracted from the number of hydrogens, the number of oxygens to be ignored and number of the nitrogens is to be added to the number of hydrogens, in arriving at the number of hydrogens.

To determine:

The number of hydrogens present in loratadine, C₂₂H_?ClN₂O₂, which has four rings and eight double bonds.

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