Question #3bfd4

1 Answer
May 10, 2017

Answer:

Phosphine is an analogue of ammonia...........

Explanation:

And thus to a first approximation it is #"trigonal pyramidal"#.

The experimental #/_H-P-H=93.5^@#, which is SMALLER than the corresponding angle in ammonia, #/_H-N-H=105^@#, and hard to rationalize on simple grounds of VESPER. You should buttonhole your prof for his rationale. (And repost his account here!)