Question

Why does trisilylphosphineP(SiHX3)X3(ICSD Entry:72676, [1]) have a pyramidal structure while trisilylamineN(SiHX3)X3(ICSD Entry:201428, [2]) is planar?

Answer 1

The difference in the structures of trisilylphosphine and trisilylamine can be explained by the electronic properties of the central atoms.

Step-by-step explanation:

The difference in the structures of trisilylphosphine (P(SiHX3)X3) and trisilylamine (N(SiHX3)X3) is due to the different electronic properties of the central atoms. In the case of trisilylphosphine, the phosphorus atom (P) has an empty d orbital, which allows it to form a pyramidal structure. On the other hand, the nitrogen atom (N) in trisilylamine does not have an empty d orbital, leading to a planar structure.