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![5.
Complex anion [AuCl2]¯ belongs to Doh symmetry point group. What is the shape of this
ion?
(4 points)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5acd57cb-8caa-425c-a4b4-b567d1bce805%2Ff53a675a-be29-4699-ab8a-ecf8c8cbbdba%2Fqk7cyk_processed.png&w=3840&q=75)
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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.Identify all the symmetry elements present in the tetrahedron, the cube, and the octahedron.
- Structural isomers can have very different point groups. There are three isomers of dichlorobenzene. Identify the point groups of the three isomers.What are the number of classes and the order of the following point groups? a C2v b D2h c D6h d S4 e Cs.Determine the point groups of the following molecules. a Fe(CO)5, which has a trigonal bipyramidal structure, b CO32, which has three resonance structures that contribute to its overall shape, c The perfectly staggered conformation of ethane, d The perfectly eclipsed conformer of ethane.
- 5. The most stable structure for N₂O4 is planar and belongs to the D2h point group, which has the character table shown below. D2h E C₂(X) C₂(V) C₂ (2) i o(xy) o(yz) o(x2) Ag 1 1 1 1 1 1 1 1 B1g 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 1 1 B2g B3g Au B1u 1 B2u 1 B3u 1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 5.1 How many translational degrees of freedom does N₂04 have? 5.2 How many rotational degrees of freedom does N₂04 have? 5.3 How many normal modes of vibration does N204 have? x², y², z² xy 5.5 How many of the vibrational modes of N₂04 are IR-active? XZ yz 5.6 How many of the vibrational modes of N₂O4 are Raman-active? Z y X Rz Ry Rx 3. 5.4 The displacement vectors for the atoms of N₂O4 span 3Ag + 3B1g + 2B2g + B3g + Au + 2B1u + 3B2u + 3B3u. What are the symmetry species of the normal modes of vibration? ☐☐☐Give all the symmetry elements in the following molecules, and assign the point group of each. a ) Xe(0) F4 b) cyclo-(C5H5) - c) IF 7 (pentagonal bipyramidal) d) Boric acid (right - assume it's rigid)1. (7 points) Symmetry is an important topic in chemistry because the symmetry of a molecule may affect its physical and chemical properties. One important task is to identify the point group of a given molecule. Please complete the following tasks for each molecule. Molecule Any LC₂ ? Any oh? Any ov? Point Highest symmetry rotation Group CI H H P H H H H H + CI cl H H 2- H H Br Br H H CI OC MICO OC CO CO
- 4. Assign a point group to each of the following: (a) (b) IF5 (c) SiH₂Cl2 (d) SeF2 (e) CIF3What are the symmetry elements and point group of each of the following?Identify the operations, the symmetry elements and the PointGroup of the molecules below: a)H2S; b)CO2; c) [PtBr4]2−; d)BF3; e)SF4; f)CH2Cl2; g)NbCl5; h)SF5Cl; i)N2H4
