September 7, 2010
09:54 PM nerz-2:
yes, I am still fighting the fever.
09:50 PM ADigioia:
Thank you for your help. I hope that you're feeling better
09:50 PM ADigioia:
OK i'll come and visit before or after lab
09:49 PM nerz-2:
so then hook these things periferally and then decide if you need multiple bonds, I can show you in my office. I will be in all day
09:48 PM ADigioia:
Do you have a copy of the PLI sheet from today?
09:48 PM nerz-2:
well I think it is good to lay out the carbons and then assume everything after the carbon or before is hooked to the carbon in question
09:45 PM ADigioia:
I figured them out, but I was looking for tricks/shortcuts on where to start
09:45 PM ADigioia:
and in PLI today there was an example of (H3C)2N(H3C)HC2C coming off of a ring that I struggled with
09:45 PM ADigioia:
and in PLI today there was an example of (H3C)2N(H3C)HC2C coming off of a ring that I struggled with
09:44 PM ADigioia:
specifically with the CClCBr2 at the end
09:43 PM ADigioia:
for example, in the translation worksheet, the first example on the 4th C I struggled with
09:41 PM nerz-2:
can you give me a chain you are paricularly struglling with
09:38 PM ADigioia:
I'm not very good at explaining myself over chat...office hours will probably be better for me to ask questions
09:37 PM ADigioia:
I guess that I just need to keep doing problems to decide whether to start from the right or the left when looking at a ring
09:37 PM nerz-2:
I would work left to right and lay it all out with the hydrogens given if hydrogens are missing make double bonds
09:36 PM nerz-2:
still here
09:29 PM ADigioia:
my natural instinct is to start on the right and work to the left but I've gotten tripped up doing this and am now thinking that left to right is bett
09:28 PM ADigioia:
for example, I am looking at the wheel of difficult functional groups and didn'tknow if there was a trick to writing the functional groups that come o
09:26 PM nerz-2:
bond line is very direct just insert the carbons over hte carbons on the ring and then add any missing hydrogens
09:25 PM nerz-2:
well there is no beginning or end you can't reall convert a ring into a condensed
09:23 PM ADigioia:
I seem to be having trouble converting rings to bond line and lewis dash strutures because I don't know where to begin often. Any advice?
09:22 PM ADigioia:
Thanks for asking them. We were spoiled over the summer because we had them right away.
09:21 PM nerz-2:
I will try to get that nailed down tomorrow
09:21 PM ADigioia:
Why is it quite the night?
09:21 PM nerz-2:
I thought they were being posted on blackboard. I have emailed the pli and they have not yet told me where they are.
09:21 PM nerz-2:
you just have to remind me.
09:21 PM nerz-2:
I will let you make it up when you get back. It is no big deal
09:20 PM nerz-2:
hi, wow this is quite a night
09:10 PM ADiGioia:
Also, where will the answers to the PLI worksheets be posted? I cannot find the answers for our last session on BB or on your website.
09:08 PM ADiGioia:
There is a visit to Dartmouth scheduled for the Friay before Fall break. What happens if we want to go to the visit but have to take the quiz?
09:07 PM ADiGioia:
Hello Dr. Nerz I have a question about Friday class when we have a visit to a school scheduled
September 6, 2010
09:37 PM nerz-2:
you are welcome
09:36 PM nerz-2:
I am covering nomenclature Wed and Fri. it is not all on your own. becuase of this holiday we are kidn of messed up but you can see where I am on t
09:36 PM OrgoBeast:
Thank you Prof Nerz!! I hope you feel better!! See you on Wed :-)
09:36 PM nerz-2:
Loudon takes a slightly different approach, but it will help you learn it.
09:35 PM nerz-2:
and do the associated problems listed on teh schedule
09:35 PM nerz-2:
and then you should move to the readings on nomenclature. There is a schedule and we are on the cusp of nomenclature
09:35 PM OrgoBeast:
Prof. Nerz I wasn't sure how far to read in the organic book. Should we be learning nomenclature ourselves?
09:34 PM nerz-2:
sorry orgobeast. You should be up to the readings associated with index of hydrogen deficiency
09:34 PM nerz-2:
i think you are ok with your amides. you will be amazed how much those ten or fifteen functional groups will serve you in your organic chemistyr studi
09:33 PM nerz-2:
OK danger, looking forward to all your questions : )
09:31 PM Danger:
Thank you for your help! Expect to see this name regularly . . .
09:31 PM Danger:
fxnal group at a time.
09:31 PM Danger:
Okay. I had written it as an amide next to an amine since I was under the mistaken impression that that carbonyl could only be in one fxnal group at
09:30 PM OrgoBeast:
Prof. Nerz where exactly would you like us to be with the readings?
09:30 PM OrgoBeast:
Prof. Nerz where exactly would you like us to be with the readings?
09:29 PM nerz-2:
I expected students would identify it as amide, but it is not exactly the same
09:29 PM nerz-2:
so a carbonyl with two nitrogens would not react exactly the same as simple amide
09:28 PM nerz-2:
it would not take the submission so I got impatient
09:27 PM Danger:
following you so far just fine.
09:27 PM nerz:
a given carbon is related to the delta plus at the carbon which is related to the nubmer and type of electronegative atoms
09:27 PM nerz:
a given carbon is related to the delta plus at the carbon which is related to the nubmer and type of electronegative atoms attached
09:27 PM nerz:
a given carbon is related to the delta plus at the carbon which is related to the nubmer and type of electronegative atoms attached
09:27 PM nerz:
a given carbon is related to the delta plus at the carbon which is related to the nubmer and type of electronegative atoms attached
09:25 PM nerz:
having the two nitrogens on the carbonyl changes the reactivity. as we alluded to a bit in class, the reactivity at
09:25 PM nerz:
the ones on the list are the ones covered in your book
09:24 PM nerz:
the ones on the list are the ones covered in your book
09:24 PM nerz:
we have to limit it somewhat as there are a lot of functional groups
09:24 PM nerz:
well we did not cover carbamides so you are not responsible for it. you are only responsible for the functional groups on teh sheet
09:24 PM Danger:
ferent functional groups to "share" a carbonyl group as such. Is this usually the case that the c=o bond can be "shared" between the two amide groups
09:23 PM nerz:
ok
09:23 PM Danger:
on the left side of the structure, you identified a functional group as carbamide or two amides. I am a bit unclear as to whether it is okay for diff
09:21 PM Danger:
Hi Dr. Nerz! I had a question about the most recent homework, question 1 (the very large structure in qhich we are identifying fxnal groups)
09:20 PM nerz:
yes there is something going around
09:19 PM DiGi:
Thanks very much! I hope that you're feeling better. It seems that a lof of people have been sick with a fever.
09:19 PM nerz:
they are due next week. so if you are lab tomorrow, they are due next tuesday. the lab is two weeks long starting this week
09:18 PM DiGi:
Do we have to turn these questions in before lab this week? or is for next week?
09:18 PM nerz:
that is right what is due is for the second week of lab. It is of value to hear the lecture first
09:17 PM DiGi:
There are pre-lab questions on p 1-18 but I remember you saying that we didn't have to do anything except for read before lab.
09:13 PM nerz:
what is the prelab question
09:13 PM nerz:
the central atom is like a carbon in a triple bond
09:12 PM nerz:
linear
09:12 PM Bill Kamens:
So in bond-line do we draw those as linear? Or at an angle?
09:11 PM nerz:
you can do that in your unsaturation
09:11 PM nerz:
yes two bonds in a row does exist. they are called cumulated double bonds
09:08 PM DiGi:
Hi everyone! I have a question about pre-lab for this week.
09:06 PM Bill Kamens:
It seems like there is no way to represent two double bonds in a row, i.e. C=C=C. Is this because compounds like that don't exist?
09:05 PM grace loudon:
okay, sounds good. Thank you!
09:05 PM nerz:
question about bond line
09:05 PM nerz:
actually no, it will be unsaturation no not through wed
09:05 PM nerz:
not totally sure about topic could be unsat no maybe a little nomenclature. It will be through wed
09:04 PM grace loudon:
Hi Dr. Nerz! Do you know the topic of Friday's quiz? If so, are we allowed to know it too?
08:57 PM Bill Kamens:
Hi Dr. Nerz, I have a question about bond-line drawings
08:56 PM nerz:
I am here if people need help. thanks for the good wishes.
08:48 PM nerz:
I am here if people need help. thanks for the good wishes.
08:06 PM Ghita&Hannah:
It's Ghita and Hannah. We're going over some chem and we just wanted to tell you we hope you feel better!
07:26 PM Ghita&Hannah:
It's Ghita and Hannah. We're going over some chem and we just wanted to tell you we hope you feel better!
03:00 PM Jeremy Liebman:
Hello, testing
03:00 PM Jeremy Liebman:
Hello, testing
September 5, 2010
09:59 PM Katie Cushing:
Also, where is the website with the answers to the handouts?
09:48 PM Katie Cushing:
Hi, Dr. Nerz - What is the difference between a Ketone and a Carbonyl?
09:43 PM nerz-2:
i am here
03:50 PM Patricia Shatz:
I need help on an Organic Chemistry problem. Can anyone help me?
September 2, 2010
10:03 PM nerz-2:
good night
10:03 PM klt:
Hi Dr. Nerz, during PLI today, I was informed that there is another worksheet (nomenclature) that we are supposed to be working on. Is this different
10:00 PM nerz:
phillies up by five runs go phillies braves lost
09:43 PM en fuego:
i'm dousing it in milk and it seems to be working
09:41 PM nerz:
great
09:31 PM pmaher:
found it. thanks!
09:27 PM nerz-2:
we isolated it once and it got all over the place in my lab and people kept getting it on their arms it took a while to get it off everything
09:26 PM nerz-2:
The key is to not touch other parts of the body. The organic material gets everywhere
09:26 PM nerz-2:
thats good.
09:25 PM nerz-2:
then you should see on teh left a tool called functional group over view
09:25 PM nerz-2:
then click on teaching tools under chem 211 lecture which is on the right side
09:24 PM nerz-2:
no, do not click on chem 211 , rather click on the red button that says webbook toward the bottom
09:24 PM nerz-2:
click on the red button that is 211 lecture
09:24 PM nerz-2:
go to www.brynmawr.edu/Acads/Chem/mnerzsto
09:24 PM en fuego:
i'm dousing it in milk and it seems to be working
09:17 PM pmaher:
Dr. Nerz, I cannot find the handout that we are supposed to work though on the website (the handout where we work up through alcohol). Can you help m
09:17 PM nerz-2:
the key is you have to flush it off by repeated flow. A little soap would not be bad to help dissolve it but dont rub
09:16 PM nerz-2:
do you have irritation
09:16 PM nerz-2:
I have gotten this stuffon me and that is how I dealt with it.
09:15 PM nerz-2:
fifteen minutes of washing with cold water, do not rub it.
09:15 PM nerz-2:
usually the lit says milk. I feel that the best remedy for chemical exposure is
09:15 PM nerz-2:
the weak acid will not react too well with bicarb
09:14 PM nerz-2:
sorry, I am having computer problems. jalapeno has capsasin in it which is a phenol. It is weakly acidic
09:10 PM en fuego:
shld yogurt be the same as milk? i dont have milk so im using yogrt
09:09 PM blankity blank:
milk washes away capsacin
09:09 PM blankity blank:
milk
09:08 PM en fuego:
any remedies you can think of? online forums suggest baking soda, or milk, or honey. so far, i've tried yogurt and bok soda but not helping :(
09:07 PM en fuego:
i was chopping a jalapeno tonight and now the skin on my hand is on fire!!
09:06 PM nerz-2:
sure
09:06 PM blankity blank:
who are you en fuego
09:05 PM en fuego:
hi dr. nerz. i have a quick real-life question
September 1, 2010
10:11 PM grace loudon:
If you have time, I have a quick question!
10:10 PM grace loudon:
Hi Dr. Nerz!
10:03 PM ettya fremont:
have a great rest of the evening dr. nerz!
10:03 PM ettya fremont:
i'll keep ploughing through and if i've got questions, i'll be sure to drop you an email. thanks!
10:00 PM nerz:
chapter 1 is good review
10:00 PM ettya fremont:
okay. great. i am working my way through chapter 1 pretty thoroughly so i hope that will help. things seem to be coming back too.
10:00 PM nerz:
I feel organic can be done with only a small amount of prep, once you learn the language
09:59 PM nerz:
also, if you want to come in tomorrow or the next day, we could figure out, but
09:59 PM nerz:
dipoles, charge, pKa, atomic orbitals, we will cover these, but when they come up we should meet
09:58 PM nerz:
I find there are a few topics that normally need to be reviewed, such as
09:57 PM ettya fremont:
i took gen chem 1 in 2005 and gen chem 2 in 2007, is this going to be a problem?
09:57 PM Lea Hecht:
Thank you and see you Friday-have a good night
09:56 PM ettya fremont:
animals are very sensitive to environmental changes. i guess i have another question - more of an apprehension -
09:56 PM Lea Hecht:
!! How sweet! Looking forward to it.
09:55 PM nerz:
he is a bichon frise abd beagle mix very cute. He misses my oldest son so he is a little wild
09:54 PM Lea Hecht:
Phew! Ok, good to hear. And I think everyone would love to meet your dog.
09:54 PM ettya fremont:
yes. bring the dog. what kind?
09:54 PM nerz:
Lee these are very normal questiosn about the different groups.
09:53 PM nerz:
I will get on it and regardless we will be going over more of it on Friday. I should bring my dog in some day
09:51 PM ettya fremont:
thanks so much. it could just be that i'm not looking in the proper spot.
09:49 PM Lea Hecht:
Nevermind on my frontlooks like I'm trying to make connections that aren't necessary.
09:48 PM nerz:
I will look for it and try to send you the url and if it is not there I will try to get it up there
09:47 PM nerz:
I really did get lost in my email. sorry about that
09:47 PM Lea Hecht:
Is alkane to cycloalkane as alkene is to aromatics?
09:47 PM nerz:
a cycloalkane has the same reactivity as a normal alkane
09:46 PM Lea Hecht:
Ok
09:46 PM Lea Hecht:
No I mean alkenesmeaning, they have double bonds
09:46 PM nerz:
aromatics are separate and distinct and have their own reactivity
09:46 PM nerz:
aromatics are not cycloalkanes
09:45 PM nerz:
they have no specific reactivity, but they need to be considered as a basis for functional groups
09:45 PM nerz:
alkanes and cycloalkanes are not functional groups
09:45 PM Lea Hecht:
Just musings.
09:45 PM ettya fremont:
i can't seem to find the answers to the worksheet we had in class today on the website.
09:45 PM Lea Hecht:
Oh that's alright! No rush here.
09:44 PM nerz:
sorry I was in an no one was here. I will be more vigilant
09:44 PM ettya fremont:
Hi! sometimes i get lost in my inbox.
09:44 PM ettya fremont:
i want to run around with a happy animal.
09:43 PM nerz:
not hiding just checking email
09:43 PM Lea Hecht:
Did you come on with questions? Or just to say hi?
09:43 PM Lea Hecht:
I think she's playing with her dog. And I'm jealous.
09:43 PM ettya fremont:
that's not good. is she hiding?
09:42 PM ettya fremont:
Hi
09:42 PM Lea Hecht:
Ettya! We've lost Dr. Nerz!
09:40 PM Lea Hecht:
I mean as a comparison between alkanes and cycloalkanes vs. alkenes and aromatics
09:35 PM Lea Hecht:
Also, do you think it's appropriate to think of aromatics as cycloalkenes? Or is that too much of a simplification?
09:24 PM Lea Hecht:
...and now that I've typed this "out-loud" I feel as though I've answered my own question and can't erase it ha! But oh well. Nevermind!
09:20 PM Lea Hecht:
I mean I guess the definition of a functional group is quite general but it's just an interesting distinction in my mind
09:19 PM Lea Hecht:
Because typically I'd think of a functional group as non-hydrogens and carbons attached to a hydrocarbon core
09:19 PM Lea Hecht:
I have a general question about functional groups. I'm curious as to why compounds such as Alkanes and Alkenes are considered to be functional groups
09:18 PM Lea Hecht:
Hi Prof Nerz!