[SOLVED] Symmetrical Group of a molecule I'm trying to study PCl5, it have a bi-pyramidal shape, with The P atom at the center. I was able to find out the group it's D3h. 1)To what irreducible representations does The "p" orbital of Phosphor ( P ) and the five "1s" orbitals of Chloride belongs to. 2)Will the "d" orbital of P will recover ( I don't know the excat english word for it ) with the "1s" of Cl ? I need to find out if the Integral I is equale to 0 or 1 ( if the representation Belongs to A1 ) The problem is I'm studying this on my own , ANd I'm not able to read the Group table correctly to understand it , for example ( http://www.webqc.org/symmetrypointgroup-d3h.html ) , I'm not able to find out which orbital belongs to which irreducible representation.. any help ?