Explain energetically favourable to promote the electron

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In order to have the outer 4 electrons involved in bonding (as in SnI4), it is necessary to promote an s electron to an empty p orbital, and following hybridization these 4 unpaired electrons can form covalent bonds. In order to promote an s electron to an empty p orbital, energy is required. Is it energetically favourable to promote this electron when bonding? Why or why not?

Reference no: EM13229441

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