Errata in H3 chem spectroscopy tutorial answers

Hi all,

referring to part 2 question 7.

The answer should be: Nitrogen has an odd valency and form 3 bonds. Hence a molecule containing an odd number of nitrogen atoms will have an odd number of hydrogen atoms. Since C, O, N have an even mass number but H has an odd mass number, an odd number of hydrogen atoms will make the total Mr an odd number, giving an odd-numbered M+ peak.

The 3Ps to success

If you happen to be a "weak" student in chemistry, hopefully this will encourage you. What can you do to get a better grade in the upcoming examination? Personally, I feel that these 3 Ps are very important:
1) Perserverance - Perhaps you did not score a good grade in this common test, but this does not mean that you will not see your As at the end of the day. I had an ex-student telling me that the first time he ever passed his Chemistry (or scored his A) was the A level examinations. Nothing is absolute and nothing is impossible. So keep on keeping on! Don't give up yet! There's still time to make a significant improvement.
2) Preparation - Some suggestions - you do not need to follow exactly. (1) Pace your revision according to our revision schedule. (2) You may want to read through your notes first and then try the ten-year-series questions to test your concepts on the topic and then move on to try the harder revision package questions. (It may be a little time consuming but guess you may need to work harder than others.)
3) Press in - Of all the Ps, I like this one the best. It is actively going all out for what you desire to achieve. Press in to your chem tutors and see them regularly for consultation. Ask them to look through your answers and to give you feedback. Don't be afraid to ask questions and to clarify your doubts. Students who come back regularly for consultation often start asking more thinking questions after a while, which shows that they are really thinking deeper into the topic. We all need a mentor or coach to guide the way and to show the way. So what are you waiting for now? Book a consultation slot with your tutors today!

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I have deleted the tagboard. Some semi-intelligent creatures have been impersonating others. Do they really think they cannot be caught? However, it is not worth the time to track them, and I do not care to entertain such nonsense. If you fail to appreciate the privileges given to you, privileges will be taken away. Henceforth, we will not entertain any questions on this site.
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Errata on H3 resource book

pg 82 point 2, third paragraph.
SHOULD BE: Thus the Z isomer of diethylstilbesterol, a synthetic oestrogen, is only one-fifteenth as active as the E isomer.

H3 Chem Spectroscopy Tutorial Answers

The answers have been sent to the photocopy shop today, and will probably be available late tomorrow. I've also included tables of data for NMR chemical shifts and IR absorptions.

In addition for Part 2 Question 4(the UV question) you need to plot the curve accurately and becareful of unit conversions and scaling factors for original sample against diluted standard aliquots. I've only given the numerical answer though.

Students wonder whats important about NMR; the following are key things, 1) Intepretation of NMR spectra - this is the most important and requires practice. 2) theories behind deshielding effects, anisotropy, electron withdrawing effect. 3) behaviour of labile protons with D2O and with CDCl3, i.e, in protic versus aprotic deuterated solvents.

cheers and all the best.

CT2 results

Well done and congratulations to the following:

Top 10 classes
1. 07S03R
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3. 07S06R
4. 07S06I
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6. 07S03I
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8. 07S03H
9. 07S03P
10. 07S03K

Top 10 improved classes

1. 07S03E
2. 07S06R
3. 07S03N
4. 07S06H
5. 07S06B
6. 07S06C
7. 07S03P
8. 07S03D
9. 07S03K
10. 07S06S

Top 3% scorers

07S03R TAN SHI MIN
07S06A WU MENGFEI
07S06I LI SHANGHUI
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07S03R LEE HWEE JUIN
07S03J LIM SHIN BIN
07S06I CHAN KE JING ELEANOR
07S06L GOH CHIAN YEH
07S06K WU MENGLIN
07S06P CHEN NIANGJUN
07S03O LIM SI YING
07S03Q JAYANTHI SETHUNARAYANAN
07S06M WEN YU SHENG
07S06L AAKRITI JAIN
07S06L ZHU HUI
07S03A ZHUANG FUREN
07S06O LONG JI HAO ISAAC
07S03F TOH ZHENG JIE
07S06C ZHU YAN
07S06I TAY SU HUI
07S06S LU RONG

Most improved students

07S06C CHEN ZHENGRONG
07S06S TIO SHU TING
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07S06O FOO GUO ZHONG MELVYN
07S03J TEO HONG YI GARRY
07S06I CHAN KE JING ELEANOR
07S03P TAN SZE HUEI, ELISA
07S06C HUANG LINGQING
07S06H LIM YI CHING CLAIRE
07S06Q WONG WENYING DAWN
07S03R HAN HEK DING
07S06B TAN SING YEAN
07S03K LAW YI MING
07S03D CHOY CHIAW YEE
07S06H TAN SU WAN
07S06K MERWYN WIJAYA
07S03I KENNETH TIONG BOON KIAT
07S03D HENG JIAN-XIONG ROY