Question

Phosphorus Pentachloride Trigonal Bipyramid 90 Cl 120 Molecular Geometry Consider the PCls molecule whose shape is an equilateral triangle-based bipyramid (each triangle face is equilateral triangle) occupied at its center by the phosphorus atom 1- Find the symmetry elements of the molecule, the order of its symmetry group as well as its international notation and the nature of the crystalline system to which it belongs 2- We envisage a substitution of a chlorine atom by a fluorine atom, assuming that the distortions generated by it do not affect the shape of the starting polyhedron 2-1 List the different possible configurations 2-2 Determine the symmetry elements of each substituted form, the order, the international notation of each point group and the nature of its crystalline system 3- Are new classes of symmetry obtained by increasing the number of substituted chlorines? If so, which ones and which crystalline system do they belong to?

Answer 1