Saturday, 16 August 2014

Why does NH3 form hydrogen bond but PH3 does not

Why does NH3 form hydrogen bond but PH3 does not? 
Answer

Nitrogen is highly electronegative as compared to phosphorus. This causes a greater attraction of electrons towards nitrogen in NH3 than towards phosphorus in PH3. Hence, the extent of hydrogen bonding in PH3 is very less as compared to NH3.

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