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- Identify the symmetry elements present in the following objects. a The Eiffel Tower. You may have to look up a picture of it if you dont remember its shape b Any book ignore the printing. c An octagonal wood block. d A jack from the set of jacks pictured here: Note that some of the points end differently.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.Determine the symmetry elements of BRF3 O E, 20v C2, 20v O E. C2 O E, C2, 2ov
- Which of the following symmetry elements is not correct for C6H6 ? C4.A O C2.B O C3.cO C6.DO1. List the symmetry elements of the molecules. A C D CH 3 H₂N en H H₂N HC HC C1 Co Br C1 Co CI H CH 3 H NH3 CH (assume CH 3 spherical) + CH NH3 (assume NH3 spherical) enWhich two molecules have the same symmetry point group? a. NH3, BCI3 O b. H20, CH2CI2 c. H20, N02 С. d. PCI3 , ALCI3
- 6. Which symmetry elements are lost on going from (a) BC13 to BCl2F and (b) BC12F to BBRCIF. Which symmetry elements are common to all these molecules?What are the symmetry elements of C4H8 assuming CH3 is spherical?The trihydrogen cation (H3") forms an equilateral triangle with Dah symmetry as shown on the diagram below. It is not stable under "normal" conditions, but it has been found in the spectroscopic data of interstellar gas clouds and planetary atmospheres. Use the information provided below to answer the next series of questions. D3h 2C 3C n 2s, 30, A,' 1 1 1 v +L E' Az' 1 1 R, (x, y) (x-y, xy) A," 1 H,* Molecule A," E" o(R, R,) (xz, yz) -2 H,* MO Diagram II Energy