Practical lab writeups see pdf files - Essay Example

Only on StudentShare

Extract of sample
Practical lab writeups see pdf files

So the product is 1,2-dimethoxy-4-nitrobenzene, consistent with the melting point.
The melting point of the semicarbazide derivative of compound A was found to be 224-225 C, which means that compound A is likely to be o-chloro-benzaldehyde or p-hydroxy-benzaldehyde. According to the 1HNMR spectrum, with benzene proton peaks around 7 ppm and aldehyde proton singlet, the second functional group should also contain one proton, showing up as a singlet. Therefore, the second functional group is a hydroxy-group, so compound A is p-hydroxy-benzaldehyde. This hydroxyl-group also gives the possibility to from the bicyclic structure of compound B.
The H atom of NH will exchange with solvent, so if D2O is added it may be replaced with D. This only influences the peak of the H of NH, which will become a doublet with the second peak (of D) at lower intensity and at higher field (lower ). ...
Download paper

Summary

The melting point of the product was found to be 94 C. This is very close to 95 C, the melting point of 1,2-dimethoxy-4-nitrobenzene, so this is very likely to be the product. Also, according to melting point the product is quite pure.
The filtrate mother liquor has not been run on TLC, so no semi-quantitative data on the relative purities of the crude product and the recrystallised product have been obtained…
Author : cathyking

Related Essays

Philosophy - Practical Ethics
In this paper I will discuss the moral difference between abortion and infanticide with special reference to the views of Michael Tooley and Mary Anne Warren. Metaphysics is an area of philosophy that deals with questions having to do with the ultimate grounding and nature of things in the world. It is concerned with such diverse topics as the mind/body problem, identity, God, the existence and nature of universals, the existence and nature of the soul, and so on. Thus, the morality of abortion, if it is to be construed as contingent upon the nature of the fetus, is an issue whose resolution...
10 pages (2510 words) Essay
Lab Report
Invention of polymerase chain reaction and thermo stable DNA polymerase has revolutionized this concept. Many techniques like Variable tandem repeat (VNTRs) and Short Tandem Repeat(STRs) based Amplified Fragment Length Polymorphism(AFLP) or DNA fingerprinting, Gender ID (Amelogenin), Mitochondrial D-Loop DNA for Maternal identification etc. have been developed for forensic investigations. PM&DQA1 is the first PCR based typing system, developed by the scientist at Cetus Corporation and commercialized by Applied Biosystems. Inc. PM& DQA1 is simple and rapid technique mainly employed in case of...
9 pages (2259 words) Lab Report
socilology : practical Sociology
At the same time other social institutions - such as the economy, politics and education - maintain their own sets of norms independent of religious guidance.
...
6 pages (1506 words) Essay
Practical lab writeups - see pdf files
The presence of 3 1H peaks indicates that it is not a dinitrate product but a mononitrate product. The presence of the 1H singlet and two doublets indicates that one H is apart and the other two are on neighbouring C atoms, so NO2 is at position 4. So the product is 1,2-dimethoxy-4-nitrobenzene, consistent with the melting point.
...
4 pages (1004 words) Essay
Cell Biol- Genetics practical lab report
The activity of protein also varied between the fractions, with the liver particulate and lysed liver particulate showing higher levels of protein than the supernatant. The results of the experiment indicate that the majority of energy converting reactions is centred within the mitochondria, with the MDH reaction causing the highest amount of absorption, suggesting a stronger reaction. The prevalence of protein within this portion of the cell supports this hypothesis. The use of electron acceptors to measure the strength of reactions was an effective approach to determining the prevalence of...
6 pages (1506 words) Lab Report
Got a tricky question? Receive an answer from students like you! Try us!