8.21 1,2-Diiododisilane has been observed in both anti andgauche conformations. (See K. Hassler, W. Koell, K.Schenzel, J. Mol. Struct., 1995, 348, 353.) For the anti con-formation, shown here,IHHSi-SiHHa. What is the point group?b. Predict the number of infrared-active silicon-hydrogenstretching vibrations.

Part A:The molecule has C2 axis that is perpendicular to a horizontal mirror plane (σh), and an…

Answered: 8.21 1,2-Diiododisilane has been…

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter13: Introduction To Symmetry In Quantum Mechanics

Section: Chapter Questions

Problem 13.30E: Structural isomers can have very different point groups. Determine the point groups of...

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4.30 The structure of 1,1,2,2-tetraiododisilane is shown here. (Reference: T. H. Johansen, K. Hassler, G. Tekautz, K. Hagen, J. Mol. Struct., 2001, 598, 171.) H I- Si -Si I H a. What is the point group of this molecule? b. Predict the number of IR-active Si-I stretching vibrations. c. Predict the number of Raman-active Si-I stretching vibrations.
8.39 How many possible isomers are there of the ion IO2F3²¯? Sketch these, and indicate the point group for each. The observed ion has IR-active iodine-oxygen stretches at 802 and 834 cm-1. What does this indicate about the most likely structure? (See J. P. Mack, J. A. Boatz, M. Gerken, Inorg. Chem., 2008, 47, 3243.
Assign the point group of the following coordination compounds: a) Cl. b) d) CI-Hg-Hg-ci 3- 2- 2+ ÇN NH3 H3N., Co* 'NH3 NH3 g) NC-Ni..iCN CN ČN h) Cu.."Br e) f) H3N Br Br CO j) H3N-Ag-NH3 i) OC-FeNO ON CO
Assign molecules to point groups: a.) C5N6+ (pyridinium)b.) [B12H12]2-c.) C8H8 (tub configuration)d.) H3CCF3 (eclipsed, staggered and gauche)e.)[Co(CN)5]3-f.) cis-[PtCl2Br2] (square planar)g.) 1,1'-dichloroferrocene (all unique staggered, eclipsed and gauche isomers) Please and thank you!
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Give the point groups of the following molecules:
Please explain
3. Pick two of the three molecules below. Determine their point groups and whether they are chiral. Show the symmetry elements that led to your answer. 2+ PEt2 Pd-Cl 1. N(SIME3)2 THF -THE (MezSi),N! trans- [UO{N(SiMe.).}.(THF),] Palladium PCP Pincer [Ru(bipy)3]2* Complex Molecule 1 Molecule 2 Molecule 3 a. Molecule number: Point Group: Chiral or achiral: b. Molecule number: Point Group: Chiral or achiral:
To what point group does the square - pyramidal ion [NI(CN)s] belong? Select one: A. C5v B. D5h С. СAV D. Dad E. D4h
2. Draw the MO diagram for the hypothetical square planar PtH42- ion. Consider only the s-interactions. Label all orbitals with the appropriate symmetry label. Include the 5d, 6s, and 6p orbitals on the metal. Plot roughly to scale. What is the point group? Use the following SALCs for the H 1s orbitals:
Ims.uop.ed Which of the following point groups would make a molecule to be polar? Select one: O D4h O C3v OTa The "group-theoretical" criterion of chirality in a molecule is: Select one:
Consider the square base pyramidal [CuCls] complex. Using the provided reference system and with the knowledge that its point group is Cav, answer the following questions: CI ....... а. Determine the central atom valence orbitals irreducible representations

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