| Who | When |
Messages | |
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| HMM
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2609
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11-23-2009 06:16 PM ET (US)
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Oh yes, duh! Totally overlooked that. Thanks. | | |
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Peter Norris
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2608
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11-23-2009 06:05 PM ET (US)
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HMM - there are no chiral centers in the product, i.e. it is achiral, and as such exhibits no optical activity.
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| HMM
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2607
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11-23-2009 04:45 PM ET (US)
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Hi Dr. Norris--On Exam 3, 2007, question 6, why is there only one product (and not two with a racemic mixture)? Is that just the way you worded the question? Thanks.
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| Peter Norris
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2606
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11-22-2009 09:53 PM ET (US)
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anon - it's all in your notes, if you were in class.
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| anon
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2605
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11-22-2009 09:06 PM ET (US)
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so is the mechanism from 9.12 the only one from that chapter?
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| Peter Norris
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2604
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11-22-2009 01:16 PM ET (US)
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Anon - 9.12 was covered in detail.
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| Peter Norris
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2603
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11-22-2009 01:16 PM ET (US)
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Zane - hopefully we got that covered in office hours.
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| anon
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2602
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11-22-2009 08:53 AM ET (US)
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dr. norris, in the notes you said we will not be covering 9.7-9.14. but you have the mechanism for section 9.12. should we familiarie ourself with this mechanism then?
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| Zane Kalik
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2601
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11-20-2009 12:36 AM ET (US)
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Dr. Norris, in regards to sp hybridization, why exactly is it that an increase in "s" character correlates with an increase in acidity? Are hydrogen ions more readily dissociated due to the fact they are bonded to very electronegative carbons as in a molecule like Acetylene (sp)?
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| Ochem Student
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2600
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11-18-2009 04:41 PM ET (US)
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Student,
"D" is the heavy isotope of hydrogen called "deuterium". Deuterium commonly replaces alot of "hydrogen" atoms in common substances.
i.e... D20;deuterated water...CDCl3;deutero-chloroform..CD3OD;deuterated methanol etc.)
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| student
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2599
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11-17-2009 06:11 PM ET (US)
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Dr.Norris,
On the Stereochem problem set 2, page 3, problem 3c, what is the D supposed to represent?
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| Peter Norris
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2598
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11-17-2009 03:31 PM ET (US)
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asdf - separate grades.
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| asdf
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2597
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11-16-2009 04:35 PM ET (US)
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Dr. Norris,
I don't know if this has already been asked, but does the lecture grade carry over into the recitation grade if the lecture grade is better?
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| Peter Norris
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2596
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11-15-2009 10:03 PM ET (US)
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Waldo - according to the YSU website you will be taking the Chemistry 3719 final exam from 10.30-12.30 on Monday, December 7th in the Cushwa lecture room.
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| Peter Norris
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2595
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11-15-2009 09:47 PM ET (US)
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ztm - there is a crossover, particularly in secondary systems, that sees the SN1 and SN2 mechanism compete. However, in 3719 we'll keep the two pathways distinct and say that SN2 gives complete inversion while SN1 gives a racemic mixture when chiral products are possible.
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| Waldo
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2594
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11-15-2009 08:35 PM ET (US)
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Dr. Norris,
would you happen to know the date time and building in which our final will take place?
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