Homework Answers
From the NMR it is evident that it is an aromatic compound with a substituent having three protons.
Total number of aromatic protons - 5
Total number of aliphatic protons -3
Based on the deshielding observed at the aliphatic region, it should correspond to -OCH3 group.
WIth the available information this should correspond to anisole
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based on 1h NMR find the unknown compound
8.5 8.0 7.0 7.5 JVC 6.5 6.0 5.5...
In the proton NMR for benzil, there are clearly some impurity peaks below 8 ppm. Although...
In the proton NMR for benzil, there are clearly some impurity
peaks below 8 ppm. Although we cannot assign these for certain, is
it possible that these peaks come from unreacted benzoin? Why or
why not?
8.0 8.3 7.5 8.2 NMR nuclei observed: H Solvent: CDCl3 NMR field strength: 400MHz 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 (ppm) f1 8.1 8.0 7.9 7.8 7.7 7.6 7.5 7.4 7.3 f1 (ppm) 11 10 12 13 14 2.0 1.5...
x: pH of Ground Water in 102 West Texas Wells 7.5 8.2 7.4 7.3 7.5 7.6...
x: pH of Ground Water in 102 West Texas Wells 7.5 8.2 7.4 7.3 7.5 7.6 7.9 7.7 7.8 7.0 7.6 7.9 7.7 8.2 7.4 7.6 7.4 7.6 7.2 7.1 7.3 7.2 7.4 7.5 7.9 8.2 7.4 7.2 7.5 7.2 7.3 7.0 7.2 7.3 7.3 7.2 7.3 7.0 8.4 7.7 7.6 7.7 7.5 7.8 7.2 7.6 8.1 7.9 7.4 8.1 8.6 7.3 8.2 7.7 8.0 7.0 8.2 7.1 7.5 8.2 7.2 7.9 8.5 7.2 7.1 7.0 7.8 7.3 7.3 7.4...
Liquid Extraction NMR and IR The 'H NMR for the unknown C: 8.0 7.5 7.0 6.5...
Liquid Extraction NMR and IR The 'H NMR for the unknown C: 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ppm Proton peak Integration Neighbors (n) Chemical Shift (ppm) Splitting pattern (n+1) (report as singlet/doublet/triplet/ete. 9 b. C must be an aliphatic alcohol. There is a strong O-H stretch in the IR and zero degrees of unsaturation. The remaining structure is determined by 'H NMR. (c) Predicted Structure C (label hydrogens with...
A variety of spectra for an organic compound with molecular formula C10H16O are presented below. The experimental accurate mass using (+) APCI source is 153.1280 u. The 1H, 13C, COSY, HSQC and HMBC NM...
A variety of spectra for an organic compound with molecular
formula C10H16O are presented below. The
experimental accurate mass using (+) APCI source is 153.1280 u. The
1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following
slides. Propose a structure for this unknown and answer or address
the following questions or requirements:
d. If there are still any questionable assignments, propose
additional NMR experiments which would solve those questions and
briefly explain specifically what correlations you...
A variety of spectra for an organic compound with molecular formula C10H16O are presented below. The experimental accurate mass using (+) APCI source is 153.1280 u. The 1H, 13C, COSY, HSQC and HMBC NM...
A variety of spectra for an organic compound with molecular
formula C10H16O are presented below. The
experimental accurate mass using (+) APCI source is 153.1280 u. The
1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following
slides. Propose a structure for this unknown and answer or address
the following questions or requirements:
a. Using the most abundant isotopes of C, H and O, what are the
errors in ppm and milli-Daltons for the experimental accurate
mass?...
Analyze the proton and carbon NMR of hexane PROTON_01 4632-2_Hexane -109 7.5 7.0 6.5 6.0 5.5...
Analyze the proton and carbon NMR of hexane
PROTON_01 4632-2_Hexane -109 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 CARBON_01 4632-2_Hexane www hwilowWWWMWWMWANAMUbwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww/WWWWWWWWWWWWwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww TTTT 230 220 210 200 190 180 170 160 150 140 130 120 110 fi (ppm) 100 90 80 70 60 50 40 30 20 10 0 -10
label the spectrum OTBS Meo Yome Me H NMR spectrum (CDC13, 400 MHz) 8.5 8.0 7.5...
label the spectrum
OTBS Meo Yome Me H NMR spectrum (CDC13, 400 MHz) 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 f1 (ppm) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 18C NMR spectrum (CDCI, 100 MHz) 210 200 190 180 170 160 150 140 130 120 110 100 fi (ppm) 90 80 70 60 50 40 30 20 10 -10
In West Texas, water is extremely important. The following data represent ph levels in ground water...
In West Texas, water is extremely important. The following data represent ph levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 Is adidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.t These data are also available for download at...
analyze this NMR & IR S23 CDC13 QE-300 240 UN (43 MIL.) 10.02s, 1H), 7.716.J-2 Hz....
analyze this NMR & IR
S23 CDC13 QE-300 240 UN (43 MIL.) 10.02s, 1H), 7.716.J-2 Hz. ) 2.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 4.0 3.5 3.0 2.5 20 15 100.5 0.0 -0.5 -1.0 -1.5 -2. 5.5 5.0 4.5 fl (ppm)
Analyze the proton and carbon NMR for 4-cyclohexane PROTON_02 4632-4-cyclohexane 7.5 7.0 6.5 6.0 5.5 5.0...
Analyze the proton and carbon NMR for
4-cyclohexane
PROTON_02 4632-4-cyclohexane 7.5 7.0 6.5 6.0 5.5 5.0 4.5 a 4.0 fi (ppm) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 CARBON_01 4632-4-cyclohexane WAWANAN www 230 220 210 200 190 180 170160 150 140 130 120 110 f1 (ppm) 100 90 80 70 60 50 40 30 20 10 0 -10
In the proton NMR for benzil, there are clearly some impurity
peaks below 8 ppm. Although we cannot assign these for certain, is
it possible that these peaks come from unreacted benzoin? Why or
why not?
8.0 8.3 7.5 8.2 NMR nuclei observed: H Solvent: CDCl3 NMR field strength: 400MHz 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 (ppm) f1 8.1 8.0 7.9 7.8 7.7 7.6 7.5 7.4 7.3 f1 (ppm) 11 10 12 13 14 2.0 1.5...
Liquid Extraction NMR and IR The 'H NMR for the unknown C: 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ppm Proton peak Integration Neighbors (n) Chemical Shift (ppm) Splitting pattern (n+1) (report as singlet/doublet/triplet/ete. 9 b. C must be an aliphatic alcohol. There is a strong O-H stretch in the IR and zero degrees of unsaturation. The remaining structure is determined by 'H NMR. (c) Predicted Structure C (label hydrogens with...
A variety of spectra for an organic compound with molecular
formula C10H16O are presented below. The
experimental accurate mass using (+) APCI source is 153.1280 u. The
1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following
slides. Propose a structure for this unknown and answer or address
the following questions or requirements:
d. If there are still any questionable assignments, propose
additional NMR experiments which would solve those questions and
briefly explain specifically what correlations you...
A variety of spectra for an organic compound with molecular
formula C10H16O are presented below. The
experimental accurate mass using (+) APCI source is 153.1280 u. The
1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following
slides. Propose a structure for this unknown and answer or address
the following questions or requirements:
a. Using the most abundant isotopes of C, H and O, what are the
errors in ppm and milli-Daltons for the experimental accurate
mass?...
Analyze the proton and carbon NMR of hexane
PROTON_01 4632-2_Hexane -109 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 CARBON_01 4632-2_Hexane www hwilowWWWMWWMWANAMUbwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww/WWWWWWWWWWWWwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww TTTT 230 220 210 200 190 180 170 160 150 140 130 120 110 fi (ppm) 100 90 80 70 60 50 40 30 20 10 0 -10
label the spectrum
OTBS Meo Yome Me H NMR spectrum (CDC13, 400 MHz) 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 f1 (ppm) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 18C NMR spectrum (CDCI, 100 MHz) 210 200 190 180 170 160 150 140 130 120 110 100 fi (ppm) 90 80 70 60 50 40 30 20 10 -10
In West Texas, water is extremely important. The following data represent ph levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 Is adidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.t These data are also available for download at...
analyze this NMR & IR
S23 CDC13 QE-300 240 UN (43 MIL.) 10.02s, 1H), 7.716.J-2 Hz. ) 2.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 4.0 3.5 3.0 2.5 20 15 100.5 0.0 -0.5 -1.0 -1.5 -2. 5.5 5.0 4.5 fl (ppm)
Analyze the proton and carbon NMR for
4-cyclohexane
PROTON_02 4632-4-cyclohexane 7.5 7.0 6.5 6.0 5.5 5.0 4.5 a 4.0 fi (ppm) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 CARBON_01 4632-4-cyclohexane WAWANAN www 230 220 210 200 190 180 170160 150 140 130 120 110 f1 (ppm) 100 90 80 70 60 50 40 30 20 10 0 -10
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