Chapter 1.3, Problem 7P

Metal clusters and catalysis.

Q1: Draw a valid Lewis structures for the following molecules. Include appropriate charges and lone pair electrons. If there is more than one Lewis structure available, draw the best structure. NH3 Sulfate Boron tetrahydride. C3H8 (linear isomer) OCN NO3 CH3CN SO2Cl2 CH3OH2*

In the following molecule, indicate the hybridization and shape of the indicated atoms. -z: CH3 CH3 H3C HO: CI: :

Q3: Draw the Lewis structures for nitromethane (CH3NO2) and methyl nitrite (CH3ONO). Draw at least two resonance forms for each. Determine which form for each is the major resonance contributor. Page 1 of 4 Chem 0310 Organic Chemistry 1 Recitations Q4: Draw the Lewis structures for the cyanate ion (OCN‍) and the fulminate ion (CNO-). Draw all possible resonance structures for each. Determine which form for each is the major resonance contributor.

Metallic clusters and nanomaterials.

Metal clusters: photochemical properties of special relevance in solar energy conversion

Q2: Draw all applicable resonance forms for the acetate ion CH3COO. Clearly show all lone pairs, charges, and arrow formalism.

Indicate what metal clusters are.

55. The photoelectric threshold energy for ytterbium metal is 4.16 × 10-19 J/atom. a. Calculate the wavelength of light that this energy corresponds to (in nm). b. Which region of the electromagnetic spectrum does this wavelength fall in? c. Would light of wavelength 490 nm produce a photoelectric effect in ytterbium? Why or why not?