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Unknown 2. Your structure will be correct if the molecules and its pieces have masses correspondi...
1 Introduction Now try another simple spectrum, Unknown 1.2. Your structure will be cor- rect if...
1 Introduction Now try another simple spectrum, Unknown 1.2. Your structure will be cor- rect if the molecule and its pieces have masses corresponding to those of the spectrum. (Make a serious attempt to solve each unknown before looking at the solution. This is a vital part of the book's instruction) Unknown 1.2 Relative intensity Unknown 1.3 contains carbon, hydrogen, and oxygen atoms. Obviously the possibilities for arranging these in a molecule of molecular weight 32 are limited. Compare any...
The Tabular data of unknowns 1 to 3 also show small peaks of masses above that corresponding to t...
The Tabular data of unknowns 1 to 3 also show small peaks of masses above that corresponding to the molecular weight. These are due to the presence of less-abundant isotopes, the carbon-12 found in nature must be accompanied by 1.1% carbon 13. Thes isotopic peaks are particularly important for deducing the elemental composition of the molecule and its pieces displayed in the mass spectrum. Elemental compositions can also be determined from the exact mass of the peak, but the necessary...
Provide the correct structure for your unknown based on the spectroscopic data provided. Provide the correct...
Provide the correct structure for your unknown based on the
spectroscopic data provided. Provide the correct name for your
compound. Either the IUPAC name, or a commonly accepted name (i.e.,
ethyl acetate in place of ethyl ethanoate) will be accepted.IR
spectrum: Assign as many peaks as possible. In particular, you
should assign peaks that were important in making your structural
interpretation (i.e. functional group peaks such as OH, C=O, N-H,
etc.).
1H-NMR spectrum: Assign all the peaks in the spectrum...
with the 15. (16 pts) Which of the following molecules are aromatic and which are not? Support your choices Hückel calculation, a Frost circle, and a few words of explanation in each case. spectr...
with the 15. (16 pts) Which of the following molecules are aromatic and which are not? Support your choices Hückel calculation, a Frost circle, and a few words of explanation in each case. spectrum. Then peak. Atomic 16. (9 pts) From the molecules shown below, choose the one that one matches the given mass explain your choice and draw the structure of the fragment that corresponds to the base masses (in a.m.u.) are as follows: C 12;H-10-16; F 19:CI- 35.45;Br...
8. Give several pieces of data you gathered from the IR spectrum that aided in determining...
8. Give several pieces of data you gathered from the IR spectrum that aided in determining (or confirming) the structure of your unknown. For example, you might mention the presence (or absence) of certain definitive peaks (include wavenumbers). Do NOT use anything from the fingerprint region. 9. Fill in the table below with the information on each unique 1H-NMR signal. You may treat all aromatic protons as a single signal if that helps. Peak Chemical Shift (8) # of *10...
5. Identify the base peak in your mass spectrum. 6. Are there other significant isotope patterns...
5. Identify the base peak in your mass spectrum. 6. Are there other significant isotope patterns in your mass spectrum? If so, what do they indicate? 7. Provide at least one fragment (not the parent ion) that was useful in determining (or confirming) the structure of the unknown and briefly explain how it was useful. Compound 14 is a liquid (b.p. 85") which finds its greatest application as an aprotic solvent UV-transparent; IR-liquid fim. MASS SPECTRAL DATA 99 100 Mass...
2. For each of the molecules or ions below, draw its Lewis structure and show any...
2. For each of the molecules or ions below, draw its Lewis structure and show any resonance structures if they exist. Show the formula charges on each atom in the structure, if applicable ΝΗ, NO 'H:N:H 2 NOH, H.COCH, COM 3 Ö: HH e 00: H:0:0:0: H-NH # H Brfs NF a FIN -F: :: :F: Brz AIF Sila 1 14 SF 11 12 13 15 SF, co, PH 10 HNO, 16 17 18 19 20 CH₂ CH₂ H₂SO. CECI,...
Using these spectra, identify the unknown compound and its structure. Explain your analysis of each spectrum....
Using these spectra, identify the unknown compound and its
structure. Explain your analysis of each spectrum.
/H d 3H 3H 12 11 10 1 4 2 0 ppm 40 60 100 80 120 140 160 180 200 ppm -20 -O 100- 80- M 20 M 0mttT 10 20 30 40 50 100 120 60 70 80 90 110 m/z L00 50 1000 200 3000 AVENUMEERI-i 4000 44 620 962 1288 31 62 1778 13 596 84 3664 923 1270 74...
2. Match the electron impact (El) mass spectrum with the correct structure from the choices below....
2. Match the electron impact (El) mass spectrum with the correct structure from the choices below. of the fragments in the El spectra of the following molecules (write the correct letter in the upper left-hand corner of the spectra). Draw the structure of the indicated fragments (*) С В OH H *(43) *(71) *(43) 100 HS--1 100- -N-113 во- 80- 60- 60- 40- 40- 20- 20- m/z m/z 3. Predict the molecular ion peak pattern (El spectrum low resolution) for...
Please list position (cm-1) and functional groups present in this spectrum. It is an unknown alcohol...
Please list position (cm-1) and functional groups present in
this spectrum. It is an unknown alcohol
In this H NMR Spectra of an unknown alcohol please list the
integration values. Also draw the structure of the unknown compound
and label the H atoms corresponding with the peaks.
FTIR Common Name: IUPAC Name: BP: MP: 22 23 24 25 26 27 28 2.93 100 3.5 4 4,5 5 5.5 MICRONS 6 8 9 10 11 12 13 14 15 16 17...
1 Introduction Now try another simple spectrum, Unknown 1.2. Your structure will be cor- rect if the molecule and its pieces have masses corresponding to those of the spectrum. (Make a serious attempt to solve each unknown before looking at the solution. This is a vital part of the book's instruction) Unknown 1.2 Relative intensity Unknown 1.3 contains carbon, hydrogen, and oxygen atoms. Obviously the possibilities for arranging these in a molecule of molecular weight 32 are limited. Compare any...
The Tabular data of unknowns 1 to 3 also show small peaks of masses above that corresponding to the molecular weight. These are due to the presence of less-abundant isotopes, the carbon-12 found in nature must be accompanied by 1.1% carbon 13. Thes isotopic peaks are particularly important for deducing the elemental composition of the molecule and its pieces displayed in the mass spectrum. Elemental compositions can also be determined from the exact mass of the peak, but the necessary...
Provide the correct structure for your unknown based on the
spectroscopic data provided. Provide the correct name for your
compound. Either the IUPAC name, or a commonly accepted name (i.e.,
ethyl acetate in place of ethyl ethanoate) will be accepted.IR
spectrum: Assign as many peaks as possible. In particular, you
should assign peaks that were important in making your structural
interpretation (i.e. functional group peaks such as OH, C=O, N-H,
etc.).
1H-NMR spectrum: Assign all the peaks in the spectrum...
with the 15. (16 pts) Which of the following molecules are aromatic and which are not? Support your choices Hückel calculation, a Frost circle, and a few words of explanation in each case. spectrum. Then peak. Atomic 16. (9 pts) From the molecules shown below, choose the one that one matches the given mass explain your choice and draw the structure of the fragment that corresponds to the base masses (in a.m.u.) are as follows: C 12;H-10-16; F 19:CI- 35.45;Br...
8. Give several pieces of data you gathered from the IR spectrum that aided in determining (or confirming) the structure of your unknown. For example, you might mention the presence (or absence) of certain definitive peaks (include wavenumbers). Do NOT use anything from the fingerprint region. 9. Fill in the table below with the information on each unique 1H-NMR signal. You may treat all aromatic protons as a single signal if that helps. Peak Chemical Shift (8) # of *10...
5. Identify the base peak in your mass spectrum. 6. Are there other significant isotope patterns in your mass spectrum? If so, what do they indicate? 7. Provide at least one fragment (not the parent ion) that was useful in determining (or confirming) the structure of the unknown and briefly explain how it was useful. Compound 14 is a liquid (b.p. 85") which finds its greatest application as an aprotic solvent UV-transparent; IR-liquid fim. MASS SPECTRAL DATA 99 100 Mass...
2. For each of the molecules or ions below, draw its Lewis structure and show any resonance structures if they exist. Show the formula charges on each atom in the structure, if applicable ΝΗ, NO 'H:N:H 2 NOH, H.COCH, COM 3 Ö: HH e 00: H:0:0:0: H-NH # H Brfs NF a FIN -F: :: :F: Brz AIF Sila 1 14 SF 11 12 13 15 SF, co, PH 10 HNO, 16 17 18 19 20 CH₂ CH₂ H₂SO. CECI,...
Using these spectra, identify the unknown compound and its
structure. Explain your analysis of each spectrum.
/H d 3H 3H 12 11 10 1 4 2 0 ppm 40 60 100 80 120 140 160 180 200 ppm -20 -O 100- 80- M 20 M 0mttT 10 20 30 40 50 100 120 60 70 80 90 110 m/z L00 50 1000 200 3000 AVENUMEERI-i 4000 44 620 962 1288 31 62 1778 13 596 84 3664 923 1270 74...
2. Match the electron impact (El) mass spectrum with the correct structure from the choices below. of the fragments in the El spectra of the following molecules (write the correct letter in the upper left-hand corner of the spectra). Draw the structure of the indicated fragments (*) С В OH H *(43) *(71) *(43) 100 HS--1 100- -N-113 во- 80- 60- 60- 40- 40- 20- 20- m/z m/z 3. Predict the molecular ion peak pattern (El spectrum low resolution) for...
Please list position (cm-1) and functional groups present in
this spectrum. It is an unknown alcohol
In this H NMR Spectra of an unknown alcohol please list the
integration values. Also draw the structure of the unknown compound
and label the H atoms corresponding with the peaks.
FTIR Common Name: IUPAC Name: BP: MP: 22 23 24 25 26 27 28 2.93 100 3.5 4 4,5 5 5.5 MICRONS 6 8 9 10 11 12 13 14 15 16 17...
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Amplitude=3;
fs=8000;
n=0:399;
t=0:1/fs: n*1/fs-1/fs;
signal=3+3*cos(2*pi*1100*t)+3*cos(2*pi*2200*t)+3*cos(2*pi*3300*t);
fftSignal= fft(signal);
fftSignal=f ftshift (fftSignal);
f=fs/2*linspace(-1,1,fs);
plot(f,abs(fftsignal);
xlabel('Frequency(Hz)’)
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