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- What are the number of classes and the order of the following point groups? a C2v b D2h c D6h d S4 e Cs.Structural isomers can have very different point groups. There are three isomers of dichlorobenzene. Identify the point groups of the three isomers.(b) Work out the point group of- (i) CIF2; (ü) IF5. 1672
- (ii) Draw a pz and a d¿? orbital and assign their point groups. 88 品(a) Given the operator = -0 C₁¹ show that [‚Â] = 0 =0 (b) Decompose the representation below into the irreducible representations of C3v. C3v T E 17/0 2C3 1 30₂ 1 ] ] (c) With the use of diagrams, find the representation of the C₂ point group to which a day orbital belongs. ]Indicate the point group of the following ions. Provide molecular structures and indicate the symmetry elements to support your answers. (a) BF2Cl (b) N2O
- 1. Using VSEPR, determine the shape of the molecules, symmetry elements/operation and assign the point group: (a) CCI4 (b) H2C=CH2 (c) CO2 (d) Co,2Assign (i) cis-dichloroethene and (ii) trans-dichloroethene to point groups.Neopentane, C(CH3)4, has Tď symmetry, with character table provided below. Suppose the characters of a reducible representation of this point group are x(E) = 17, x(C3) = 2, x(C₂) = 5, x(S4) = -3, and x(od) = -5 (this is shown explicitly in the last row of the character table). (a) Use the T₁ irreducible representation to determine the order of the point group using the Little Orthogonality Theorem (Vallance Eq. 1.15.13, see Problem 3). (b) Determine how many times each irreducible representation in Ta is contained in this reducible representation. Td A₁ A₂ E Τ1 T₂ r E 1 1 2 3 3 17 8C3 1 1 -1 1 0 0 2 3C₂ 1 1 2 -1 6S4 1 -1 1 101 1.5 7 0 1 713 7. 1.5 -1 -1 60d -3 -1 -1 -5
- 10. Determine the point groups for following species. (a) (b) H B (င) (d) 72+ H Ru Huse vsepr rules to determine the shapes of each of the following species. then establish their rotation axes and mirror planes and hence identify the point group to which they belong. hint: constructing a molecular model will help (a) phosphine, ph3; (b) the carbonate ion, co3^2-; (c) the sulfate ion, so4^2-; (d) the hexafluorophosphate ion, pf 6-Consider the three following molecules and answer the questions below.HC≡CHH2C=CH2H3C-CH3 (3 conformers with different symmetry)(a) For each molecule, including all conformers as indicated, draw the molecule, assign it toits point group, and draw on the diagram the symmetry elements that were used to makethe assignment. State in each case whether or not the species is dipolar and/or chiral.(b) If one hydrogen atom in each molecule is substituted by a chlorine atom, sketch the newmolecules and assign them to their point group. For this set of mono-chloro compounds: state the most common point group state how many are chiral state how many are dipolar state which molecule/conformer has the highest symmetry point group state which molecule/conformer has the lowest symmetry point group identify which of these molecules/conformers have three different H atomenvironments(c) For the dichlorinated versions of the molecules/conformers considered in part (a): state the most common point…