Symmetry Operations

Question 1
What symmetry operation would result in the following changes:

1.    [Solution]
2.    [Solution]
3.    [Solution]
4.    [Solution]

Question 2
What symmetry operation would result in the following changes:

1.    [Solution]
2.    [Solution]
3.    [Solution]
4.    [Solution]
5.    [Solution]

Vibrational Spectroscopy

Question 1
For the following molecules determine the number of IR and Raman active vibrations:

1. SiCl₄ [Solution]
2. trans-SF₂Cl₄ [Solution]
3. SbCl₅ [Solution]
4. CH₂Cl₂ [Solution]

Resonance Spectroscopy

Question 1
For the following molecules give the expected coupling pattern that would be observed in a ¹⁹F NMR spectrum (ignore any J_CF and J_HF):

1. PF₆^- [Solution]
2. cis-¹⁹⁵PtF₂Cl₂^2- [Solution]
3. fac-MoF₃(PMe₃)₃ [Solution]
4. DF [Solution]
5. SiFCl₃ [Solution]
6. SeF₄ [Solution]
7. mer-PF₃Cl₃^- [Solution]
8. ⁵⁷FeF₄^- [Solution]
9. AgFPMe₃ [Solution]
10. AlF₄^- [Solution]

Question 2
For the following molecules give the number of peaks and their relative intensity (lowest whole number ratiox) in a ¹H NMR spectrum (note: ¹J_HX >> ²J_HX):

1. SnH₄ [Solution]
2. F₂SiH₂ [Solution]
3. NH₄⁺ [Solution]
4. cis-PtH₂Cl₂ [Solution]
5. FPH₂ [Solution]
6. H₃CCH₃ [Solution]
7. Cl¹²CH₂¹²CH₃ [Solution]
8. H₃PSe [Solution]
9. Cl¹⁵NH₂ [Solution]
10. F₃¹²CPH₂ [Solution]