Homework Answers
On the basis of provided mass spectrum,
Non-branched saturated hydrocarbon will be Octadecane (C18H38).
Explanation:
Molecular ion peak at m/z 254 reveals the molecular weight of the molecule.
Non-branched saturated hydrocarbon have -CH2- repeating unit. Lets divide the molecular weight of molecule by the molecular weight of repeating unit to obtain approximate value repeating units.
So, the compound is 18 carbon containing hydrocarbon.
Mass spectrum also reveals the fragmentation of hydrocarbon chain. For example-
C18H38•+ at (m/z 254) is Molecular ion peak
C17H35+ at (m/z 239) generated by removal of -CH3 Unit from main parent chain.
C16H33+ at (m/z 225) and others m/z values are easy to predict on the same basis.
C4H9+ at (m/z 57) is base peak.
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An unknown, non-branched saturated hydrocarbon has the mass spectrum below. What is the structure of the...
An unknown, non-branched saturated hydrocarbon has the mass spectrum below. What is the structure of the unknown hy...
An unknown, non-branched saturated hydrocarbon has the mass spectrum below. What is the structure of the unknown hydrocarbon? 100. 57 71 85 50 29 113 127 141155 189 183 197 211 225 241 254 20 80 100 120 140 160 180 200 220 240 40 60 An unknown compound with formula CaHioO, gave a negative test with 2,4- dinitrophenylhy drazine; however, the unknown tested positive with the Jones reagent. When added to a solution of bromine dissolved in methylene, the...
2. . An unknown, non-branched saturated hydrocarbon has the mass spectrum s below. What is the...
2. . An unknown, non-branched saturated hydrocarbon has the mass spectrum s below. What is the structure of the unknown hydrocarbon? 100) 3. "19 127 141 158 189 188 107 211 225 241 20 40 60 80 100 120 140 160 180 200 220 240 An unknown compound with formula C H100, RVO negative tent with 2.4 dinitrophenylhydrazine; however, the unknown tested positive with the Jones reagent. When added to a solution of bromine dissolved in methylene, the reddin solution...
The **C NMR and mass spectrum of an unknown compound is shown below. The unknown gave...
The **C NMR and mass spectrum of an unknown compound is shown below. The unknown gave an immediate precipitate when treated with 2,4- dinitrophenylhydrazine. When treated with the iodoform reagent, the unknown gara yellow precipitate. a. What is the structure of the unknown? What is the structure of the yellow precipitate that resulted when the compo was treated with the iodoform reagent? ita wi o mo 40 50 60 ther than ito 70 80 90 100 110 120 130 140...
The H-NMR spectrum of an unknown compound (formula CaHgO2) is shown below. Draw the structure of...
The H-NMR spectrum of an unknown compound (formula CaHgO2) is shown below. Draw the structure of the unknown compound. Question 5 4 1 6 5 8 10 11 Ppm The 13C-NMR spectrum of an unknown compound (formula CgH180) is shown below. Its 1H-NMR spectrum only shows one singlet at 1.2 ppm. Draw the structure of this unknown compound. uestion 2 220 200 160 140 120 PPM 100 80 240 180 60 40 20 Create OscerSketch Answer 2 What would be...
Identify the structure. TTITITTTTTTT M 2270 problem 5 IR spectrum (liquid film) 1745 4000 3000 2000...
Identify the structure.
TTITITTTTTTT M 2270 problem 5 IR spectrum (liquid film) 1745 4000 3000 2000 V 03 1600 ) 12008 (cm mass spectrum yo absorbance UV spectrum no significant absorption above 210nm og 86 Mt 113 CH,NO 250- 300 (nm) TTT 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 310 m/e TT ZOMHz carbon-13 NMR spectrum CDCi, solution off-resonance decoupled proton decoupled 220 - 200 180 160 140 120 100 80...
14. Explain the difference in the appearance of the two mass spectra below: 31 43 El-MS...
14. Explain the difference in the appearance of the two mass spectra below: 31 43 El-MS CH2COCZH6CHO 60 | 55 97 | | | 61 122 لالالالالا 157 15/ Abundance 120 140 160 180 200 220 240 40 60 80 100 100 7 CI-MS (METHANE) 123 M = 200 للننليلنا 141 201 100 120 160 180 200 220 240 140 miz
please help find the structure. thanks Unknown 11 – 1H-NMR Spectra 3.591 3.569 SOT 1.574 ISST...
please help find the structure. thanks
Unknown 11 – 1H-NMR Spectra 3.591 3.569 SOT 1.574 ISST -1.291 3.5 3.0 2.5 0 1. 0 .5 0.0 ppm Unknown 11 - 13C-NMR Spectrum - 220 200 180 160 140 120 100 80 0 ppm -62.80 ミュー 20 220 100 80 200 180 160 140 120 Unknown 11 - IR and Mass Spectra Unknown 11 - IR and was seven Reative itensity TTTTTTTH O- m 60 /z TRANSMITTANCE [%] لالالالالا OD 40'0o 3500...
solve for the unknown molecular structure. #2 IR Spectrum iquid m 1740 2000 v (em) 800...
solve for the unknown molecular structure.
#2 IR Spectrum iquid m 1740 2000 v (em) 800 3000 1600 1200 4000 100 Mass Spectrum 80 No significant UV absorption above 220 nm 5e M116 (1%) 73 C&H1202 120 160 m/e 40 80 200 240 280 13C NMR Spectrum (20.0 MHz, CDa, solution) -CH C-H -CH TMS solvent proton decoupled 200 160 120 80 40 8 (ppm) H NMR Spectrum (100 MHr, CDC, soluon) 20 Hz aas pom 192 ppm 0.03 Pem...
Deterine the following structure using the following spectroscopy (NMR spectrum analysis, chemical shifts, multiplicity): MF: CuHi40...
Deterine the following structure using the following
spectroscopy (NMR spectrum analysis, chemical shifts,
multiplicity):
MF: CuHi40 EE H-NMR HNMR "C-NMR 211 40 20 180 160 120 100 80 60 200 140 Fpm CDs-e5-332
Please draw the unknown molecule presented in the specs, Thanks!!! Mass Spectrum (not shown): [M] = 169 (100%) m/z IR S...
Please draw the unknown molecule presented in the specs,
Thanks!!!
Mass Spectrum (not shown): [M] = 169 (100%) m/z IR Spectrum (not shown): 2985, 2250 (m), 1745 cm1 (all listed are strong (s) unless otherwise indicated) H NMR Spectrum (400 MHz, CDC I3, 25 °C) 5 3 PPM 2H 2H 2H 6H 3H C NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCI3, 25 °C) (CH2) (C) (CH3) (CH2) (CH3) (C) (C) (CH2) 180 160 80 140 120 100 PPM 60...
An unknown, non-branched saturated hydrocarbon has the mass spectrum below. What is the structure of the unknown hydrocarbon? 100. 57 71 85 50 29 113 127 141155 189 183 197 211 225 241 254 20 80 100 120 140 160 180 200 220 240 40 60 An unknown compound with formula CaHioO, gave a negative test with 2,4- dinitrophenylhy drazine; however, the unknown tested positive with the Jones reagent. When added to a solution of bromine dissolved in methylene, the...
2. . An unknown, non-branched saturated hydrocarbon has the mass spectrum s below. What is the structure of the unknown hydrocarbon? 100) 3. "19 127 141 158 189 188 107 211 225 241 20 40 60 80 100 120 140 160 180 200 220 240 An unknown compound with formula C H100, RVO negative tent with 2.4 dinitrophenylhydrazine; however, the unknown tested positive with the Jones reagent. When added to a solution of bromine dissolved in methylene, the reddin solution...
The **C NMR and mass spectrum of an unknown compound is shown below. The unknown gave an immediate precipitate when treated with 2,4- dinitrophenylhydrazine. When treated with the iodoform reagent, the unknown gara yellow precipitate. a. What is the structure of the unknown? What is the structure of the yellow precipitate that resulted when the compo was treated with the iodoform reagent? ita wi o mo 40 50 60 ther than ito 70 80 90 100 110 120 130 140...
The H-NMR spectrum of an unknown compound (formula CaHgO2) is shown below. Draw the structure of the unknown compound. Question 5 4 1 6 5 8 10 11 Ppm The 13C-NMR spectrum of an unknown compound (formula CgH180) is shown below. Its 1H-NMR spectrum only shows one singlet at 1.2 ppm. Draw the structure of this unknown compound. uestion 2 220 200 160 140 120 PPM 100 80 240 180 60 40 20 Create OscerSketch Answer 2 What would be...
Identify the structure.
TTITITTTTTTT M 2270 problem 5 IR spectrum (liquid film) 1745 4000 3000 2000 V 03 1600 ) 12008 (cm mass spectrum yo absorbance UV spectrum no significant absorption above 210nm og 86 Mt 113 CH,NO 250- 300 (nm) TTT 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 310 m/e TT ZOMHz carbon-13 NMR spectrum CDCi, solution off-resonance decoupled proton decoupled 220 - 200 180 160 140 120 100 80...
14. Explain the difference in the appearance of the two mass spectra below: 31 43 El-MS CH2COCZH6CHO 60 | 55 97 | | | 61 122 لالالالالا 157 15/ Abundance 120 140 160 180 200 220 240 40 60 80 100 100 7 CI-MS (METHANE) 123 M = 200 للننليلنا 141 201 100 120 160 180 200 220 240 140 miz
please help find the structure. thanks
Unknown 11 – 1H-NMR Spectra 3.591 3.569 SOT 1.574 ISST -1.291 3.5 3.0 2.5 0 1. 0 .5 0.0 ppm Unknown 11 - 13C-NMR Spectrum - 220 200 180 160 140 120 100 80 0 ppm -62.80 ミュー 20 220 100 80 200 180 160 140 120 Unknown 11 - IR and Mass Spectra Unknown 11 - IR and was seven Reative itensity TTTTTTTH O- m 60 /z TRANSMITTANCE [%] لالالالالا OD 40'0o 3500...
solve for the unknown molecular structure.
#2 IR Spectrum iquid m 1740 2000 v (em) 800 3000 1600 1200 4000 100 Mass Spectrum 80 No significant UV absorption above 220 nm 5e M116 (1%) 73 C&H1202 120 160 m/e 40 80 200 240 280 13C NMR Spectrum (20.0 MHz, CDa, solution) -CH C-H -CH TMS solvent proton decoupled 200 160 120 80 40 8 (ppm) H NMR Spectrum (100 MHr, CDC, soluon) 20 Hz aas pom 192 ppm 0.03 Pem...
Deterine the following structure using the following
spectroscopy (NMR spectrum analysis, chemical shifts,
multiplicity):
MF: CuHi40 EE H-NMR HNMR "C-NMR 211 40 20 180 160 120 100 80 60 200 140 Fpm CDs-e5-332
Please draw the unknown molecule presented in the specs,
Thanks!!!
Mass Spectrum (not shown): [M] = 169 (100%) m/z IR Spectrum (not shown): 2985, 2250 (m), 1745 cm1 (all listed are strong (s) unless otherwise indicated) H NMR Spectrum (400 MHz, CDC I3, 25 °C) 5 3 PPM 2H 2H 2H 6H 3H C NMR Spectrum (with DEPT), proton-decoupled (125 MHz, CDCI3, 25 °C) (CH2) (C) (CH3) (CH2) (CH3) (C) (C) (CH2) 180 160 80 140 120 100 PPM 60...
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