Homework Answers
The M+ peak at 136 and M+2 peak at 138 with almost equal intensity confirms the presence of Br group
now 2,4-nitrophenylhydrazine gives ppt immediately indicates the presence of carbonyl group may be aldehyde or ketone
peak at above 200 ppm in c13 nmr confirms it is ketone
since it also gives iodoform test hence it also has -COCH3 group present
with all this information it is fairly easy to predict that compound is
1-bromopropan-2-one
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The **C NMR and mass spectrum of an unknown compound is shown below. The unknown gave...
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...
Pretest #2 An unknown compound with formula C H O gave a sooty flame when burned...
Pretest #2 An unknown compound with formula C H O gave a sooty flame when burned tip of a spatula. When reacted with 2,4-dinitrophenylhydrazine an orange-rec precipitate resulted. The unknown also gave a positive test with the Tollens a Schiffs reagenta. When a fow drops of the unknown was added to the reddish. Reagent, a blue-green color resulted. The mass spectrum of the unknown is ah below. 100 83 43 40 Ills 50 20 30 60 70 80 90 100...
hen the sodium fusion filtrate of an unknown compound was treatedv NOs, a yellow precipitate was...
hen the sodium fusion filtrate of an unknown compound was treatedv NOs, a yellow precipitate was formed. The unknown tested negative Jones Reagent, the Lucas reagent and with 2,4-DNP. The mase sped he compound is shown below. What is the structure of the unknown? What is the formula of the yellow precipitate that resulted when the sodium fusion filtrate was treated with AgNOa? What is the structure of the fragment at m/z= 127. 100 158 50 127 14 141 63...
Student XXX-XX unknown liquid compound bumed with a sooty flame. The unknown gave an orange precipit...
Student XXX-XX unknown liquid compound bumed with a sooty flame. The unknown gave an orange precipit with 2,4-dinitrophenylhydrazine, and nega positive iodoform test. The infrared spectrum of the compound revealed a strong absorption near 1700 cm. The mass spectrum of the compound is shown below. What is the name and structure of this unknown compound, and what is the nature of the strong absorption near 1700 em? tive Schiff's and Tollens tests. The uaknown also gave a 100 50 120...
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...
An unknown compound with formula CaHo0, gave a negative test with dinitrophenylhy drazine; however, the unknown...
An unknown compound with formula CaHo0, gave a negative test with dinitrophenylhy drazine; however, the unknown tested positive with the Jones reagent. When added to a solution of bromine dissolved in methylene, the reddi solution turned colorless. The mass spectrum of the compound is shown below. 3. 100 92 134 77 105 50 115 51 55 63 39 31 43 80 50 100 110 120 130 60 40 90 30 a. What is the structure of the unknown. b.What is...
POST-LAB QUESTIONS 1. A compound of molecular formula CH..0 forms a yellow precipitate with 2,4-dinitrophenylhydrazine reagent...
POST-LAB QUESTIONS 1. A compound of molecular formula CH..0 forms a yellow precipitate with 2,4-dinitrophenylhydrazine reagent and a yellow precipitate with reagents for the iodoform test, draw the structural formula for this compound. 2. What kind of results do you see when the following compounds are mixed together with the given test solution? a) with 2,4-dinitrophenylhydrazine with chromic with chromic acid with 12-KI reagent CH3CH2CH with Tollens' reagent 3. Write the structure of the compound that gives a silver mirror...
The 1H-NMR and 13C-NMR spectra of an unknown compound (formula C8H10) are shown below. Draw the structure of the unknown...
The 1H-NMR and 13C-NMR spectra of an unknown compound (formula
C8H10) are shown below. Draw the structure of the unknown compound.
The total integration of the peaks at around 7 ppm is 4. The
integration of the peak at around 2 ppm is 6.
7 6 5 4 3 ppm TTTTTTTTTTTTTTTT 200 180 160 140 120 100 80 60 40 20 0 pom CH3 Create OscerSketch Answer 8 Incorrect: Answer has an incorrect structure.
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...
13. What can you say about an unknown compound that gave a pouldve test with 2...
13. What can you say about an unknown compound that gave a pouldve test with 2 hydrazine and a positive test with the Jones Reseat? now compound that gave a pouldve test with 2,4-dinitrophenyl 14 What can you say about sa unknown compound when dissolved in distilled water and tested with peper, pave an estimated pH of about 81. 15. What can you say about an unknown compound that turned a wet plece al blue litmus red? 16. What can...
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...
Pretest #2 An unknown compound with formula C H O gave a sooty flame when burned tip of a spatula. When reacted with 2,4-dinitrophenylhydrazine an orange-rec precipitate resulted. The unknown also gave a positive test with the Tollens a Schiffs reagenta. When a fow drops of the unknown was added to the reddish. Reagent, a blue-green color resulted. The mass spectrum of the unknown is ah below. 100 83 43 40 Ills 50 20 30 60 70 80 90 100...
hen the sodium fusion filtrate of an unknown compound was treatedv NOs, a yellow precipitate was formed. The unknown tested negative Jones Reagent, the Lucas reagent and with 2,4-DNP. The mase sped he compound is shown below. What is the structure of the unknown? What is the formula of the yellow precipitate that resulted when the sodium fusion filtrate was treated with AgNOa? What is the structure of the fragment at m/z= 127. 100 158 50 127 14 141 63...
Student XXX-XX unknown liquid compound bumed with a sooty flame. The unknown gave an orange precipit with 2,4-dinitrophenylhydrazine, and nega positive iodoform test. The infrared spectrum of the compound revealed a strong absorption near 1700 cm. The mass spectrum of the compound is shown below. What is the name and structure of this unknown compound, and what is the nature of the strong absorption near 1700 em? tive Schiff's and Tollens tests. The uaknown also gave a 100 50 120...
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...
An unknown compound with formula CaHo0, gave a negative test with dinitrophenylhy drazine; however, the unknown tested positive with the Jones reagent. When added to a solution of bromine dissolved in methylene, the reddi solution turned colorless. The mass spectrum of the compound is shown below. 3. 100 92 134 77 105 50 115 51 55 63 39 31 43 80 50 100 110 120 130 60 40 90 30 a. What is the structure of the unknown. b.What is...
POST-LAB QUESTIONS 1. A compound of molecular formula CH..0 forms a yellow precipitate with 2,4-dinitrophenylhydrazine reagent and a yellow precipitate with reagents for the iodoform test, draw the structural formula for this compound. 2. What kind of results do you see when the following compounds are mixed together with the given test solution? a) with 2,4-dinitrophenylhydrazine with chromic with chromic acid with 12-KI reagent CH3CH2CH with Tollens' reagent 3. Write the structure of the compound that gives a silver mirror...
The 1H-NMR and 13C-NMR spectra of an unknown compound (formula
C8H10) are shown below. Draw the structure of the unknown compound.
The total integration of the peaks at around 7 ppm is 4. The
integration of the peak at around 2 ppm is 6.
7 6 5 4 3 ppm TTTTTTTTTTTTTTTT 200 180 160 140 120 100 80 60 40 20 0 pom CH3 Create OscerSketch Answer 8 Incorrect: Answer has an incorrect structure.
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...
13. What can you say about an unknown compound that gave a pouldve test with 2 hydrazine and a positive test with the Jones Reseat? now compound that gave a pouldve test with 2,4-dinitrophenyl 14 What can you say about sa unknown compound when dissolved in distilled water and tested with peper, pave an estimated pH of about 81. 15. What can you say about an unknown compound that turned a wet plece al blue litmus red? 16. What can...
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