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- Identify the symmetry elements present in the following objects. a A ream of blank paper, no holes. b A ream of blank three-holed paper. c A round pencil, unsharpened, with cylindrical eraser. d A round pencil, sharpened, with cylindrical eraser.In your own words, explain why an object that has more symmetry elements is said to have higher symmetry than an object with fewer symmetry elements.Identify all the symmetry elements present in the tetrahedron, the cube, and the octahedron.
- Construct the symmetry-adapted linear combination molecular orbitals for hydrogen sulfide, H2S.Figure 13.27 shows the structure of the molecule porphine. Figure 13.27 The structure of porphine. Determine the symmetry elements present in the molecule, and its point group. Does the point group change if an Fe2+ ion is substituted for the two hydrogen atoms in the center of the porphine ring?Determine if the following species have permanent dipole moments. a Dichloromethane, CH2Cl2 b Chlorobenzene, C6H5Cl c Ammonia, NH3 d Carbon dioxide, CO2.
- Determine all the symmetry elements of the following molecules Methane, Carbon tetra fluoride Boron tri fluoride Beryllium dichloride Phosphorus pentachloride Allene (C3H4) Ethene Tetraphenylmethane , C(C6H5)4Using appropriate diagram(s), show which of the symmetry operation(s) does the [SO4]2- ion have: (i) C4 (ii) σh (iii) S4.1. Find the molecular geometries and list the symmetry elements of the following molecules and assign the molecules to point groups: a. HF, b. IF5, c. XeO2F2 d. CH4