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Shrawan Kashyap 8 years, 3 months ago
The transition of an electron from an f orbital which is lower in energy to an f orbital which is higher in energy is defined as a f-f transition. It has been noted that the colours of lanthanide complexes originate mostly from such charge transfer interactions between metal and the ligand.
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The packing efficiency is the fraction of the crystal (or unit cell) actually occupied by the atoms. It must always be less than 100% because it is impossible to pack spheres (atoms are usually spherical) without having some empty space between them.
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Rahul Sharma 8 years, 3 months ago
Hence chlorobenzene is more electronegative than cyclohexyl chloride. Therefore, the density of electrons C-Cl bond at chlorine atom is less in chlorobenzene than cyclohexyl chloride. Due to this polarity of the C-Cl bond decreases and hence dipole moment of chlorobenzene is lower than cyclohexyl chloride.
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