Hi everyone!
There is a task that I can't solve. Can you explain me how I have to draw the full mechanism?
Draw the mechanism of the reactions of step 1 and 2. Indicate the product before step
3. (in step 2 also TMG =Tetramethylguanidine is given and instead of the
protecting group DMT was...
Hello, I just learned the bases of IUPAC nomenclature and I couldn't find a good and reliable resource for problems to practice.
if you know one please share it with me .
thanks.
I don't really know how to begin. I've done alkylations by having two of the same compounds react with each other e.g. two aldehydes but never started out with dimethyl malonate.
I was thinking I need 1,4 dibromobutane to form the cyclopentane ring but apart from that I'm clueless
Hi everyone, just wanted to know how does a soluble, volatile impurity affect the boiling point of a liquid? I know it depends on the difference between the boiling points of the liquid and the impurity, but I'm afraid i still didn't get the point.
Thanks
Homework Statement
Draw this formula in line angle structure. CH3CH2OC(O)CH2CC(CH2)3CH(CN)CHO.
Homework Equations
None.
The Attempt at a Solution
I'm confused with the CC(CH2)3 part of the condensed formula. I knew I got it wrong the first time I drew it because I couldn't just tag three...
Homework Statement
Need help naming these 2 molecules:
Homework EquationsThe Attempt at a Solution
I think they are:
ethoxycyclohexane
5-chloro-2-ethenyl-4-iodobenzonitrile
Homework Statement
So we did a lab in organic chemistry where we did a resolution experiment for enantiomers and in the separatory funnel we had sodium tartrate/tartaric acid left in the aqueous phase of the funnel. It asks why this compound is more soluble in high ph solutions as compared to...
Homework Statement
I have a methyl orange molecule.
Then my problem says that "wool is a protein, a naturally occurring polymer made up of amino acids with ionized side chains. cotton is a naturally occurring polymer made up of glucose units with hydrophillic groups surrounding each glucose...
Homework Statement
______________Stgae 1 [/B]
P:C3H6O ----->
_________________Br2 in organic solvent
Q:C3H6OBr2
Stage 2
-->R:C3H5Br3
1.What is the structural formula of P and Q respectively?
2.What is the reagents in the conversion of Q to R??
(1) Phosphorous tribromide liquid
(2)...
If we add br2 / hv to (s)-1,2-dibromobutane. Where would the radical bromine go? The book hints that the product is an optically inactive substance.
So I'm guessing that the bromine would go towards the carbon that has the bromine atom on it making 1,2,2-tribromobutane?
Would appreciate...
Hi, this is my first post. I'm generally more of a blog/message board reader than a contributor, but there's really been something that has been eating away at me, making it difficult for me sleep at night. (Note: long post coming up)
Last semester in Organic Chemistry I, I made a huge...
I am currently learning about stereochemistry in my O-chem class. I just have a few questions that I were running through my head. I know there are a lot of questions here, but they're not HW-related at all; my prof. just taught the lecture and I have had these questions on my mind.
1. How...
Homework Statement
Im having some problems with some oxidation and reduction mechanisms. I am not sure if I am doing them correctly.
Homework Equations
1. O=C=O + CH3-MG++I-
2. Acetone + NH4+, Na+ H3BCN
The Attempt at a Solution
1. I break one of the bonds from the oxygen...
Homework Statement
Last week in organic chem lab, we were provided with an H NMR spectrum of an unknown compound with the formula C7H5NO3. I'm not terribly good at analyzing these spectra, but I've managed to figure out that I'm looking at 4-nitrobenzaldehyde. The only thing that's bothering...
I started doing organic chemistry lab a few weeks ago and the instructor is an evil bastard when it comes to marking lab reports. We've 2 reports to do per week and I spend at least 6 hours on each report but only manage to get 60%. I can't be wasting all this time on a single class. Are there...
Homework Statement
Hi all,
i have to identify 5 samples (1,2,3 were solids, 4,5 were liquids) by classifying them as
1) Aliphatic or aromatic and
2) Carboxylic acid, amine (primary, secondary, tertiary) or ammonium carboxylate
We did a burn test on the solids, tested solubility in water...
This is for a friend:
The worksheet says:
Name the following comounds:
It has a picture, which is a benzene ring with 2 PhD groups off the 1 and 2 positions. Is also says "THis one is a pun. See if you can figure it out!"
Thanks,
nkk
Homework Statement
A question on a pretest asks me to name this. I know it's either (1R,2R) or (1S,2S)1,2-Cyclopentanediol because the OH's are facing in opposite directions, but I'm not sure how to figure out if the OH's are S or R
2. The attempt at a solution
I somewhat have an...
Hi guys, I've got a question which i couldn't solve.
Both napthalene (two benzene ring join together) and benzoic acid are aromatic compounds which exist as white solids.
Based on their physical ahd chemical properties, describe how you could separate the components of a mixture of these...
Homework Statement
When 100 mL of an aqueous solution containing 1.0 g of caffeine is extracted with 10 mL of chloroform at room temperature, 0.5 g of caffeine is transferred to the chloroform layer. Calculate the distribution coefficient of caffeine between chloroform and water at room...
Hello. I have a couple of questions.
Why are the boiling points of alkenes lower than alkanes?
My thinking: something with van der waas forces?. Not sure.
Why do haloalkanes have higher boiling points than alkanes?
My thinking: dipole-dipole forces?
What is an experiment that can...
Hello,
I am a physics undergrad...getting ready for my final semester this summer. I have to take a chemistry class (actually, anything above a first General Chemistry class). It just so happens that the ONLY such Chem class they offer (small school) during my final semester is Organic...
Since Benedict's test is testing for the presence of a reducing agent (in the form of a carbohydrate), would that not mean it would give a false positive if acid was present (i.e. is acid not considered to be a reducing agent, it being a proton donor)?
Hi,
I am supposed to design 2 experiments for my senior year Chem class.
Right now I cannot think of anything that is interesting, relatively advanced but at the same time at a high school level (its only a design lab so I can include advanced equipments).
Topics that interest me the...
Homework Statement
Write a detailed mechanism for the following reaction:
Attached picture
Homework Equations
N/A
The Attempt at a Solution
Okay, I know this is PART of the mechanism for the oxidation of a glycol by periodic acid which causes cleavage of the C-C bond between the...
I was wondering does bromide react with propanol or propanal at all?
Also, what answers do people get for this question, i say it either propanol or propanal as i don't know if either reacts with bromide and both would be a suitable answer.
The question is:
Compound A has a molar mass...
Homework Statement
Name the following compound:
CH3CH2C(CH3)2CH(CH2CH3)CH2CH2CH3
It's an alkane (Is there a way to see that it's an alkane when it's in this format?)
Homework Equations
The Attempt at a Solution
I really have no idea where to start. I can name compounds...
We've been doing syntheses for a little bit in class and I just can't get these. I'm having trouble taking the final compound and figuring out how to synthesize it from the starting compound(s). I feel like I'm better using reverse synthesis but I'm still getting stumped on that. I just can't...
If a person drank methanol, they would go blind, and their breathalyser analysis (in units of mg/100 mL blood) would be in error. Its reading would be?
I have a lab question that I'm stuck on.
For your assigned molecule evaluate the energy barrriers to the rotation:
from anti to gauche
from gauche to gauche
from gauche to anti
I have data/graph of steric energy vs. dihedral angle of 1-chloropropane, but I don't know how to use...
Homework Statement
Are these two structures resonance?
if not why not?
Homework Equations
The Attempt at a Solution
I drew these resonance forms myself, but the answer book didnt' have this resonance structure in its answer and i wanted to know if this indeed is a...
[SOLVED] Organic Chem - Resonance Structures #2
Homework Statement
Trying to figure out this resonance structure...Draw the lowest energy alternative..
http://img162.imageshack.us/my.php?image=553562cu7.jpg
The Attempt at a Solution
ive been trying to move the upper double bond...
Hi everyone (me again),
I am currently in my first year Chemistry course, s its really general in the sense that we are covering broadly about every topic in Chemistry (except for the specialized ones). Now we just started organic chemistry and I noticed not a lot of math is involved, so I...
Hello,
I need to make sure I understand some of the reactions correctly... For example:
CH2OHCH3 in H+ will give us CH2=CH2. I would think that here the H+ bonded with the OH resulting in H2O (a leaving group), but I am not sure what happens to the other leaving H.
In RC≡CR' in Na/NH3...
we ofen hear the terms organic, natural and chemical in the media. Organic and natural are usually used to imply that a product is "healthy" and/or "environmentally friendly" while chemical often implies negative implications for health and for the environment. In your opinion are these...
After drawing the 8 alcohols with the formula C5H11OH, I'm asked to "Describe how they are formed and give two uses for this type of alcohol."
The only example in my text for this is the hydration of an alkene which, at a glance, wouldn't make sense for 2,2-dimethyl 1 propanol. Is this one...
Homework Statement
I am to draw a structural diagram of 2,4-dimethyl-1-heptyne.
2. The attempt at a solution
----------CH3
CH=C-CH2-CH-CH2-CH2-CH3
---CH3
I tried just using spaces but it wouldn't indent them so I used hyphens. Now, I'm fairly certain my answer is correct (one of...
Hey can anyone help me with this question?
What is the major product from the acid-catalyzed hydration of 3-methyl-2-pentene?
a. 3-methylpentane
b. 3-methyl-1-pentanol
c. 3-methyl-2-pentanol
d. 3-methyl-3-pentanol
e. 3-methoxypentane
Would the answer by D? My reasoning is that when...
Only three weeks into organic chemistry I, and I'm already feeling hopelessly confused. Can anyone recommend a good study guide or book to help clarify the basics, and explain the big picture? Thanks!
Hey,
I have a question which asks me to provide two examples of how organic chem can be used to improve existing products and therefore provide solutions to newly identified health or environment problems.
One example is unleaded gasoline, instead of leaded.
What are some others? I've...
Hi,
I have done simple polymerization but none like this. Can you please help me on this question.
What would be the structure of the polymer produced by the polymerization of (see attached picture)
Draw 3 repeating units.
Thanks so much
well i have a really simple question about organic chemistry if someone could help me it wil be nice.
Q. why is 2-bromocyclohexanal more easily hydrated as compared to cylohexanal.
Q. Why are 3 Degree alcohols more basic the 1 degree alcohol.
Q. Why we add finely divided platinium in...