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- a In the Td point group, an S41 improper rotation is equivalent to what other improper rotation? b In the D6h point group, the symmetry operation labeled C21 is equivalent to what other symmetry operation?Determine the D3h symmetry species of the sp3d hybrid orbitals, assuming that the C3 axis is coincident with the z-axis and that one of the orbitals lies along the positive x-axis. See Example 13.16.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.Determine the point groups of the following molecules. a Hydrogen selenide, H2Se b Partially deuterated hydrogen sulfide, or HDS c The chair conformer of cyclohexane, C6H12 d The boat conformer of cyclohexane, C6H12a Unlike methane, bromochlorofluoromethane (CHBrClF) is chiral. Determine all symmetry elements that are present in CHBrClF and identify its point group. b If the fluorine in this molecule were substituted with a hydrogen atom, what is the point group for the new molecule? Is it chiral?
- Determine the symmetry species of the D3h point group for the sp2 hybrid orbitals, assuming that the C3 axis is coincident with the z-axis and that one of the orbitals lies along the positive x-axis. See Example 13.16.Determine which single symmetry operation of the following point groups is equivalent to the given combination of multiple symmetry operations. a In C2v, C2v=? b In C2h, iC2=? c In D6h, C6h=? d In D2d, C2C2=? e In Oh, iS4=?What symmetry elements must be present for a particular moleculeto be achiral?
- Identify the symmetry species of the Symmetry Adapted Linear Combination (SALC) ? = ?′ − ?′′ in the C2v molecule NO2, where ?′ is a 2px orbital on one O atom and ?′′ is a ???? 2px orbital on the other O atom.How many symmetry planes and symmetry axis in C3H8O. also is there a center of symmetry in C3H8O?Identify the symmetry species of the Symmetry Adapted Linear Combination (SALC) ? = ?? ′ − ?? ′′ in the C2v molecule NO2, where ?? ′ is a 2px orbital on one O atom and ?? ′′ is a 2px orbital on the other O atom. please show your reasonings from the basics thank you
