Name……………………
Student Number…………………
CH450 CHEMICAL WRITING AND PRESENTATION
MID TERM EXAMINATION
WEDNESDAY 30 MARCH 2011
Time allowed: 60 minutes
1. Write improved titles for the following. Convert assertive sentence type
titles to descriptive (label) titles and avoid hanging titles. (10 points)
(a) A comparative study of extraction methods for the volatile compounds in Muscat
grape juice
Comparison of extraction methods for volatile compounds in Muscat grape juice
(b) Acetohydroxamatoiron (III) complexes: thermodynamics of formation and
temperature-dependent speciation
Thermodynamics of formation and temperature-dependent speciation of
acetohydroxamatoiron (III) complexes
(c) Studies on the reaction kinetics and mechanism of iron (II) reduction of cishalogeno(cetylamine)bis(ethylenediamine)cobalt (III) complex in aqueous perchloric acid
Reaction kinetics and mechanism of iron (II) reduction of cishalogeno(cetylamine)bis(ethylenediamine)cobalt (III) complex in aqueous perchloric acid
(d) Small Yttrium-doped gold clusters show fluxionality and -aromaticity
Fluxionality and -aromaticity of small Yttrium-doped gold clusters
(e) Sulfides are easily oxidized to sulfoxides by iodosobenzene and benzeneseleninic
acid as a catalyst
Easy oxidation of sulfides to sulfoxides by iodosobenzene and benzeneseleninic acid as
catalyst
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2. Rewrite the “Abstract” below, according to recommendations discussed in
class. Word limit: 50. Write a graphical abstract to match this abstract (10 points)
Reduction of carbonyl compounds with metal hydride is one of the most basic
transformations in organic synthesis. Recently, efforts have been devoted to utilize
inexpensive, stable, environmentally benign metal hydrides as a reductive hydride
source4. We effectively reduce ketones and aldehydes to the silyl ethers of the
corresponding alcohol in high yields (see Table 1) by the reaction of calcium hydride and
trialkylsilyl chloride (R3SiCl) in the presence of a catalytic amount of zinc chloride
(Scheme 1). The reaction is general, efficient, has high functional group compatibility
and the reagents are inexpensive, stable and environmentally friendly. (96 words)
Ketones and aldehydes were effectively reduced to the silyl ethers of the corresponding
alcohol in high yields by the reaction of calcium hydride and trialkylsilyl chloride (R3SiCl)
in the presence of a catalytic amount of zinc chloride. The reaction is general, efficient,
has high functional group compatibility and the reagents are inexpensive, stable and
environmentally friendly.
Graphical abstract
CaH2, R3SiCl,
ZnCl 2
O
R1
R2
Conditions
OSiR 3
R1
R2
2
3. Change the following references (a)-(c) to the style shown in the box below. (10
points)
23 A. P. de Silva, D. B. Fox, A. J. M. Huxley and T. S. Moody, Coord. Chem. Rev., 2000,
205, 41.
3 Cyanide in Biology, ed. B. Vennesland, E. F. Comm, J. Knownles, J. Westly and F.
Wissing, Academic, London, 1981.
5 G. D. Muir, Hazards in the Chemical Laboratory, The Royal Society of Chemistry,
London, 1977.
(a) 11. Bau, J. and P.M. Weber (2011). Electronic effects on photochemistry: the diverse
reaction dynamics of highly excited stilbenes and azobenzene. J Am Chem Soc: 133,
4153-4660
11 J. Bau and P. M. Weber, J. Am. Chem. Soc., 2011, 133, 4153.
(b) 20. Kankia, B. L.; Marky, L. A. A. J. Am. Chem. Soc. 2001, 123, 10799-10804.
.
20 B. Kankia and L. A. A. Marky, J. Am. Chem. Soc., 2001, 123, 10799.
(c) 14. Carbon Nanotubes; Endo, M.; Iijima, S.; Dresselhaus, M. S., Eds.; Elsevier:
Oxford, 1996.
14 Carbon Nanotubes, ed. M. Endo, S. Iijima and M. S. Dresselhaus, Elsevier, Oxford,
1996.
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