For the structures shown below, state the number of pi electrons present in the molecule. H- H. H Number of pi electrons Number of pi electrons %3D Is the molecule aromatic according to the Huckel criteria? If the molecule were planar, would it be antiaromatic?

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Stereochemistry and Isomerism

Stereochemistry deals with the three-dimensional structure and properties of molecules. It explains the arrangement of atoms and their manipulation within a molecule in a 3D structure. Stereochemistry can be dealt with all types of molecules. Based on the stereochemistry of a molecule, the physical and chemical properties of the molecules vary.