Homework Answers
The no. of C's, C=O, aryl etc are written in the image attached
in a tabular form. I couldn't understand what is that 0-50 column
for. So, i left it blank. If you would explain me about this column
a bit, then i would definitely answer. Thankyou
Add Answer to:
Hello
I need help with this.
the
question is to look at the structure and predict...
Hi! can you please explain step by step how i would go about proposing a structure for this? I know that DEPT-90 shows...
Hi! can you please explain step by step how i would go about
proposing a structure for this?
I know that DEPT-90 shows CH groups & DEPT-135 shows CH
& CH3 in the positive region and CH2 in the negative region. I
also know that the normal graph shows the C's. However, i have
answer to this question, but I have no idea how they came up with
it. Can you please explain step by step your rationale how to...
What is the structure of the unknown organic compound based on the information listed below?
What is the structure of the unknown organic compound based on
the information listed below?
Mass Spectrum (not shown): [M]-223 (100%) m/z IR Spectrum (not shown): 3060, 2985, 2850, 2750, 1745, 1600, 1550, 1495, 1350 cm otherwise indicated) (all listed are strong (s) unless H NMR Spectrum (400 MHz, CDCl3, 25 °C) d (J 8 Hz) d (J 2 Hz) quin dd(J 8, 2 Hz) 2 PPM 1H 1H 1H1H 1H 2H 3H 3H 13C NMR Spectrum (with DEPT), proton-decoupled...
Questions for the lab: 1. Give a structure for each of the following formulas that show...
Questions for the lab: 1. Give a structure for each of the following formulas that show only one (1) peak in the proton NMR. a. CH&0 b. C110 2. How would you distinguish between each of the following compounds using H-NMR? a. O CH3 and Cl 12-C-OH methyl benzoate phenylacetic acid b. CH2-C-OH and H;C phenylacetic acid CH3 4-methylbenzoic acid ta c. CH3-C-CH3 and CH3-CH2-CH-??? 2-butanol ?? t-butyl alcohol and H3C CH3 1,4-dimethylbenzene 1,2-dimethylbenzene 3. Identify a compound, C,H2O, that...
Analzye the following spectra, and propose a structure for each. The bottom set of 3 spectra are ...
Analzye the following spectra, and propose a structure for each.
The bottom set of 3 spectra are DEPT spectra, top: CH only, middle:
CH, CH3 up, CH2 down, bottom: normal BB decoupled spectrum. Explain
your assignments . Analyze means determine integrals, draw
splitting trees, determine carbon type (C, vs CH vs CH2 vs CH3 and
structural environment. Use ChemDraw to check your proposed
structure (include output),
Problem C 7.5 7.0 .5 6.05.55.0 4.5 4.03.5 3.0 2.5 ppm 31 ppm 140...
Hi could you help me with this problem please? The following spectroscopic data were obtained for...
Hi could you help me with this problem please? The following spectroscopic data were obtained for an organic compound: i. MS (relative abundance in parentheses): M+ = 86 ; signals at 29 (92) and 41 (100) among others ii. IR (cm-1): 3100 (weak sharp), 2970 (medium sharp), 2850 (medium), 1650 (weak sharp), 1100 (strong sharp) iii. H1 NMR : Signal A at 4 ppm (3H, triplet), Signal B at 3.53 ppm (2H quartet), Signal C at 4.01...
A suggested approach to solving structures is provided for your benefit (this is by no means...
A suggested approach to solving structures is provided for your benefit (this is by no means comprehensive) Since the molecular formula is provided for each problem students will use the formula provided below where C = #carbons, N = # of nitrogen's, H = #hydrogens, and X = # of halogens to find the Unsaturation index (U). U /2C+N Examine the IR spectrum for the presence or absence of groups with diagnostic absorption bands e.g. carbonyl groups, hydroxyl groups, amines...
QUESTION 1 Answer all parts (a) Give an explanation of the variation in chemical shifts of...
QUESTION 1 Answer all parts (a) Give an explanation of the variation in chemical shifts of the aromatic carbons in the 130C NMR spectrum of methoxybenzene. Note that the 13C chemical shift of benzene is 128 ppm Carbon Chemical Shift (ppm) CH 160 114 130 120 15 Marksl (b) Natural abundance 3C NMR spectra of organic compounds are routinely measured in the proton decoupled mode. What is the advantage of using this technique? What information about molecular structure is lost...
IR Spectra help, question up top Use IR. proton NMR and MS data to deduce the...
IR Spectra help, question up top
Use IR. proton NMR and MS data to deduce the correct structure Draw the structure and dide it. Indicate on the IR, NMR and MS spectra the information you got from each to deduce the structure. Problem 20 IR Spectrum 4000 3000 2000 1800 12000 00 8 Mass Spectrum 8 8 No significant UV absorption above 220 nm 8 8 CgH NO 240 280 40 80 120 180 200 13C NMR Spectrum (1000 MHE....
draw the structure for the spectroscopy and show steps and label each part Mass Spectrum (not...
draw the structure for the spectroscopy and show steps
and label each part
Mass Spectrum (not shown): [M] = 302 (75%), 304 (100%), 306 (25%) m/z (all listed are strong (s) unless otherwise IR Spectrum (not shown): 3090, 2985, 2850, 2750, 1715, 1610, 1500 cm indicated) 'H NMR Spectrum (400 MHz, CDCI, 25 °C) t(J = 2 Hz) t(J= 2 Hz) +(J= 2 Hz) 2H 6H 3H 1H 1H 1H PPM HC NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCI,...
If i could get some help on either of these 2 worksheets i would greatly appreciate...
If i could get some help on either of these 2 worksheets i
would greatly appreciate it! Thanks so mich!
do some molecules with the same formula (or even connectivity!) have different properties? ACQUIRE (USING MODELS!) 1. Fill in the following tables and BUILD each structure as you go. Have your instructor check your answers after each table or as directed Name and Condensed structure Skeletal structure Molecular formula Name: C8H18 2,3-dimethylhexane Molecular formula: C&HI8 Constitutional (structural) isomer of A...
Hi! can you please explain step by step how i would go about
proposing a structure for this?
I know that DEPT-90 shows CH groups & DEPT-135 shows CH
& CH3 in the positive region and CH2 in the negative region. I
also know that the normal graph shows the C's. However, i have
answer to this question, but I have no idea how they came up with
it. Can you please explain step by step your rationale how to...
What is the structure of the unknown organic compound based on
the information listed below?
Mass Spectrum (not shown): [M]-223 (100%) m/z IR Spectrum (not shown): 3060, 2985, 2850, 2750, 1745, 1600, 1550, 1495, 1350 cm otherwise indicated) (all listed are strong (s) unless H NMR Spectrum (400 MHz, CDCl3, 25 °C) d (J 8 Hz) d (J 2 Hz) quin dd(J 8, 2 Hz) 2 PPM 1H 1H 1H1H 1H 2H 3H 3H 13C NMR Spectrum (with DEPT), proton-decoupled...
Questions for the lab: 1. Give a structure for each of the following formulas that show only one (1) peak in the proton NMR. a. CH&0 b. C110 2. How would you distinguish between each of the following compounds using H-NMR? a. O CH3 and Cl 12-C-OH methyl benzoate phenylacetic acid b. CH2-C-OH and H;C phenylacetic acid CH3 4-methylbenzoic acid ta c. CH3-C-CH3 and CH3-CH2-CH-??? 2-butanol ?? t-butyl alcohol and H3C CH3 1,4-dimethylbenzene 1,2-dimethylbenzene 3. Identify a compound, C,H2O, that...
Analzye the following spectra, and propose a structure for each.
The bottom set of 3 spectra are DEPT spectra, top: CH only, middle:
CH, CH3 up, CH2 down, bottom: normal BB decoupled spectrum. Explain
your assignments . Analyze means determine integrals, draw
splitting trees, determine carbon type (C, vs CH vs CH2 vs CH3 and
structural environment. Use ChemDraw to check your proposed
structure (include output),
Problem C 7.5 7.0 .5 6.05.55.0 4.5 4.03.5 3.0 2.5 ppm 31 ppm 140...
A suggested approach to solving structures is provided for your benefit (this is by no means comprehensive) Since the molecular formula is provided for each problem students will use the formula provided below where C = #carbons, N = # of nitrogen's, H = #hydrogens, and X = # of halogens to find the Unsaturation index (U). U /2C+N Examine the IR spectrum for the presence or absence of groups with diagnostic absorption bands e.g. carbonyl groups, hydroxyl groups, amines...
QUESTION 1 Answer all parts (a) Give an explanation of the variation in chemical shifts of the aromatic carbons in the 130C NMR spectrum of methoxybenzene. Note that the 13C chemical shift of benzene is 128 ppm Carbon Chemical Shift (ppm) CH 160 114 130 120 15 Marksl (b) Natural abundance 3C NMR spectra of organic compounds are routinely measured in the proton decoupled mode. What is the advantage of using this technique? What information about molecular structure is lost...
IR Spectra help, question up top
Use IR. proton NMR and MS data to deduce the correct structure Draw the structure and dide it. Indicate on the IR, NMR and MS spectra the information you got from each to deduce the structure. Problem 20 IR Spectrum 4000 3000 2000 1800 12000 00 8 Mass Spectrum 8 8 No significant UV absorption above 220 nm 8 8 CgH NO 240 280 40 80 120 180 200 13C NMR Spectrum (1000 MHE....
draw the structure for the spectroscopy and show steps
and label each part
Mass Spectrum (not shown): [M] = 302 (75%), 304 (100%), 306 (25%) m/z (all listed are strong (s) unless otherwise IR Spectrum (not shown): 3090, 2985, 2850, 2750, 1715, 1610, 1500 cm indicated) 'H NMR Spectrum (400 MHz, CDCI, 25 °C) t(J = 2 Hz) t(J= 2 Hz) +(J= 2 Hz) 2H 6H 3H 1H 1H 1H PPM HC NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCI,...
If i could get some help on either of these 2 worksheets i
would greatly appreciate it! Thanks so mich!
do some molecules with the same formula (or even connectivity!) have different properties? ACQUIRE (USING MODELS!) 1. Fill in the following tables and BUILD each structure as you go. Have your instructor check your answers after each table or as directed Name and Condensed structure Skeletal structure Molecular formula Name: C8H18 2,3-dimethylhexane Molecular formula: C&HI8 Constitutional (structural) isomer of A...
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