Nobody downloaded yet

NMR - Lab Report Example

Comments (0) Cite this document
Summary
In determining Keto-Enol equilibrium constant, Proton NMR spectroscopy is used to evaluating a number of keto-mixtures. The spin-spin splitting and the chemical shift pattern are employed. The equilibrium constant is affected by…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER96.7% of users find it useful
NMR
Read TextPreview

Extract of sample
"NMR"

Download file to see previous pages Hydrogen bonding stabilizes the enol form in polar solvents contrary to the non-polar solvents that lack hydrogen bonding. Stabilization of the enol form is attained by intramolecular hydrogen bonding.
The HNMR spectrum for compound CH3OH display two peaks with a chemical shift of 4.9287 and 3.3721 and integration of 1 and 3 respectively. The computed equilibrium constant for acetylacetone in CCl4 is higher than the equilibrium constant for acetylacetone in CH3OH.
The equilibrium constant for acetylacetone in CCl4 is higher than that in CH3OH because it is a non-polar solvent. The equilibrium constant is a ratio of the quantity of enol form to the quantity of keto form. Therefore, the quantity of keto form is inversely proportional to the equilibrium constant. The keto form increases with increase in solvent polarity because keto is favored by hydrogen-bonding solvents. The CH3OH compound used in this experiment display only two peaks in the NMR spectrum. The spectrum lacks the OH peak thus gives a slightly lower keto form than expected.
The main factor in stabilizing any form is the intermolecular hydrogen bond. From research, the polar solvent has the capability of establishing two intermolecular bonds in one molecule and the non-polar solvent establishes only one intermolecular hydrogen bond. (Malcolm). However, in this case, the polar solvent only establishes one intermolecular hydrogen bond. The temperature affecting the equilibrium constant is related to the equilibrium change in enthalpy to that of ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“NMR Lab Report Example | Topics and Well Written Essays - 250 words”, n.d.)
NMR Lab Report Example | Topics and Well Written Essays - 250 words. Retrieved from https://studentshare.org/chemistry/1692548-nmr
(NMR Lab Report Example | Topics and Well Written Essays - 250 Words)
NMR Lab Report Example | Topics and Well Written Essays - 250 Words. https://studentshare.org/chemistry/1692548-nmr.
“NMR Lab Report Example | Topics and Well Written Essays - 250 Words”, n.d. https://studentshare.org/chemistry/1692548-nmr.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Detecting the Cylindrospermopsin using HPLC-PDA and NMR
...of cylindrospermopsin will ultimately lead to toxicity. Standard methods used in the detection and quantification of cylindrospermopsin are based on LC-MS (Eaglesham et al., 1999). However as noted by Welker et al. (2002), LC-MS may be expensive and out of reach for countries encountering toxic blooms and High Performance Liquid Chromatography (HPLC) and characterization with nuclear magnetic resonance (NMR) may offer a reliable alternative. High-performance liquid chromatography separates compounds from a mixture and also helps in identifying, quantifying and purifying an individual compound from a mixture of compounds. The basis of separation of compounds in HPLC is pressure which is used to load the compounds into the...
5 Pages(1250 words)Assignment
Paraphrasing the lab report. keep the tables and structure
...? Lab Report College This experiment uses the Fischer esterification process to synthesize an ester (ethyl propionate). To achieve this, propionic acid is reacted with ethanol in the presence of a certain catalyst, which may be H2SO4 or equivalent. The purity of the ethyl produced Ethyl propionate is identified by use of 13C NMR, boiling point 1H NMR spectra and through its IR. The IR spectrum of the resulting Ethyl propionate had the following bonds C=0,-C-H, and R-O-‘R (ether). Moreover, the carbon NMR spectrum of the resulting ester had the same carbons in the structure of the produced Ethyl propionate. The H-NMR spectrum in the experiment indicated to have the same...
8 Pages(2000 words)Admission/Application Essay
History of analytical techniques used in structure determination
...History of analytical techniques used in structure determination Contents Introduction 2. X-ray diffraction or X-ray Crystallography 3. ElectronDiffraction 4. Neutron Diffraction 5. Nuclear Magnetic Resonance (NMR) 6. Infra Red (IR) 7. Ultra Violet or Visible Spectroscopy (UV/VIS) 8. Mass Spectrometry (MS) Summary References Introduction- Structure determination is a most important field that covers all branches of chemistry. It is obviously essential to know the structure of compounds for the following reasons: 1. It helps us to understand the properties of materials, components, liquid crystals, molecular electronics, drugs, pesticides, polymers etc. 2. Aid ...
5 Pages(1250 words)Essay
Explain the basic principles of MR image production
...names: electron spin resonance (ESR) or electron paramagnetic resonance (EPR). The other category, in which the absorbing particles are atomic nuclei, is called nuclear magnetic resonance (NMR).2 MRI Basics The resonances are actually the absorptions of particular frequencies and are found in EPR and NMR arises from some of the most fundamental properties of matter. A general theory of EPR and NMR must be derived from quantum mechanics, but a classical analogy provides some insight. In the familiar model, every atom has a massive nucleus containing N positively charged protons and a number of uncharged neutrons. Outside the nucleus are N negatively charged electrons in various "orbits"...
5 Pages(1250 words)Essay
Organic and analytical chemistry
...Organic and Analytical Chemistry Infra-red spectroscopy (IR), Mass Spectrometry (MS), and Nuclear Magnetic Resonance spectroscopy (NMR). are three basic methods that are commonly used for the identification of organic compounds. Each of these techniques measures specific properties of molecules that are unique to the particular compound and can be used to determine the structure of its molecules. Together, the information from MS, IR and NMR can be used to determine the chemical identity and three-dimensional structure of the molecules of an unknown compound. MS provides information about the different component pieces of a molecule according to their masses. IR provides information about the functional groups that are present... in the...
2 Pages(500 words)Essay
NMR Characterization of Nylon 6
...NMR Characterization of Nylon 6 Nuclear Magnetic Resonance (NMR) spectroscopy is one of the most important methods for the solid characterization of the polymers. NMR is used to measure the molecular features, polymer chain conformation, dynamics and morphology of the molecules. NMR are able to provide information about the structure of the polymers of about 2 – 200 Aº length, which includes Nylon-6. This level of magnification is not possible with the other methods. They are also able to provide molecular level explanation for the transition states of the molecules including the ones in Nylon-6. So, this paper focusing on Nylon-6 will discuss the characterization of...
10 Pages(2500 words)Research Paper
Preparation of sample for NMR analysis and integration
...PREPARATION OF SAMPLE FOR NMR ANALYSIS AND INTEGRATION Submitted Summary Nuclear magnetic resonance (NMR) spectrometry is a powerful tool used to recognize the novel compounds chemical structures. To acquire high quality spectra for the elucidation of structure, the NMR method needs relatively large amounts of pure compound, which often needs substantial purification from the extracts or the other compound mixtures. The requirement for large amounts of pure compound is because of the relatively low sensitivity of NMR and the lack of a compound separation system in analysis of NMR. The Purpose of this paper will be to discuss the sample preparation for...
2 Pages(500 words)Essay
Introduction
...can be used for identifying an organic compound by comparing it with a known sample (Fox and James 209). Nuclear Magnetic Resonance-a technique that identifies the nuclear spin flipping provoked in the radio frequency array of a molecule placed in a high magnetic field. Because 1H as well as 13C are magnetically vigorous nuclei. NMR spectroscopy may offer crucial structural information about organic molecules. Information acquired from H-NMR and C-NMR is corresponding. In H-NMR: the chemical shifts, integration and multiplicity of signals affords crucial information on the type of proton, number of protons liable for observed signal as well as number of nearest...
1 Pages(250 words)Essay
Qualitative Analysis, IR, NMR (Organic Chemistry)
...3020.49 3 2976.18 4 1162.18 5 1598.1 6 1495.15 7 1450.96 8 1072.12, 9 962.17 10 691.89 11 763.65 Tables for NMR graph 13C NMR of acid base extraction 187.275 128.637 128.546 128.245 127.987 127.783 126.469 40.735 40.546 40.125 39.959 39.532 40.735 13C NMR of neutral products 187.275 186.356 185.599 184.565 181.458 128.637 126.469 77.300 77.245 76.975 76.879 76.666 1H NMR of the acid base extraction 7.7860 7.6789 7.5690 7.4156 3.41679 3.40687 3.39431 2.05066 1.88789 1.04763 1.04567 1.03955 1.03589 1.02908 1.02235 For NMR, the acid used DMSO and the other product (neutral) used CDCl3 Discussion The temperature of carboxylic was relatively higher due to...
3 Pages(750 words)Lab Report
Lab report (Using NMR)
...Lab report using NMR al affiliation) The aim of the experiment is to determine the structure of C10H18O molecule through utilization of the NMR spectrum which has proved to a significant utility in elucidation of molecular structure since the properties displayed can be associated with the chemical perception of the molecular structure. The chemical shift targeting each nucleus can be correlated to the chemical environment with the scalar coupling showing an indirect interaction between the individual nuclear that are mediated by the electrons found in the chemical bond and appropriate conditions, the number of the nuclei are related to the area of the resonance. Hydrogen molecule found in the hydro...
4 Pages(1000 words)Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Lab Report on topic NMR for FREE!
logo footer
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us