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LIST ALL THE 3D ELEMENTS OF THE SYMMETRY PRESENT IN BIPHENYL
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- a 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?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.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 point groups of the following molecules. a Hydrogen peroxide, H2O2 it is not planar. b Allene, CH2=C=CH2 c D-alanine Its absolute stereochemistry can be found in any good organic or biochemistry textbook. d L-alanine, and compare with part c above.How many symmetry planes and symmetry axis in C3H8O. also is there a center of symmetry in C3H8O?Which of the following would be expected to have a dipole moment of zero on the basis of symmetry? Explain. a. SOCl2; b. SiF4; c. OF2.
- Consider orthorhombic space-group symmetry Pnma: When the X and Y directions are switched, one obtains a different setting of the same space group – Pmnb. In as few sentences as possible, yet with details, explain why not Pmna. If you think a sketch will help, supplement your explanations with a figure.Identify and Draw the operations, the symmetry elements and how the atoms in the BF3 molecule are transformed by labeling the Fluorine atoms in A, B and C.Molecules of AsF3 are polar while molecules of AsF5 are not. Use a symmetry argument to explain why. Note: Please briefly explain, Thank you.