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QUESTION 2 Which term best describes the bond cleavage shown below? H3C H3C + H-R R...
help (10 points) Write the letter ONLY of the term below that best matches the given definition: 10 a). Heterolytic...
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(10 points) Write the letter ONLY of the term below that best matches the given definition: 10 a). Heterolytic bond breakage d). Electrophile g). Homolytic bond breakage j). Pro-R k). Substitution b). Si face e). Polar reaction c). Nucleophile f). Pro-S i). Elimination reaction j). Addition reaction m). Differential h). Radical reaction i). Re face 1). Dimer A process that involves symmetric bond breaking and bond making This occurs when both bonding electrons remain with one product fragment. A...
11. Which of the following best explains why the synthetic route shown below would be unsuccessful?...
11. Which of the following best explains why the synthetic route shown below would be unsuccessful? 2) NaNH2 3) (CHs)hCBr A) The alkynide anion is not a strong enough nucleophile to react with 1-bromopropane in step 1 m amide is not a strong enough base to deprotonate the terminal alkyne in step anion formed by reaction with sodium amide will facilitate an E2 (rather C) The alkynide than SN2) reaction with t-butyl bromide. 5oth substtution reactions will occur on the...
3. Which of the following best describes the general reaction type exemplified by peptide bond formation?...
3. Which of the following best describes the general reaction type exemplified by peptide bond formation? O Electrophilic aromatic substitution O Nucleophilic addition O Proton transfer (Brønsted acid-base reaction) O Nucleophilic acyl substitution O Electrophilic addition
Indicate whether the following reaction, mechanism not shown, involves C O or O-H bond cleavage of...
Indicate whether the following reaction, mechanism not shown, involves C O or O-H bond cleavage of the alcohol molecule. HBr "SN1-like" BrH H :0; 3 alkyl bromide 2 alcohol O c-O bond cleavage O o-Hbond cleavage Both C-O and O-H bond cleavage.
Question 11 (3 points) Which of the following best describes the reaction shown below? H,SO HO...
Question 11 (3 points) Which of the following best describes the reaction shown below? H,SO HO OH hydrogenation hydration neutralization hydrolysis dehydration ORI
1) A chemical reaction and a table of bond dissociation energies are shown below. H3C H...
1) A chemical reaction and a table of bond dissociation energies are shown below. H3C H НАС + H2O HOZCHz H2C H acid HzC catalyst Bond BDE (KJ/mol) Bond BDE (KJ/mol) Csp3-H 410 Csp2-Csp2 sigma 418 Csp2-H 427 Csp2-Csp2 pi 264 Csp-H 523 C-O sigma 355 Csp3-Csp3 368 C-O pi 261 Csp2-Csp3 418 HO-H 460 a) Calculate the enthalpy change (AH) for the reaction. Remember to include the sign and units. b) If you touched the outside of the reaction...
Question 6 8.34 pts Which term best describes the relationship between the two structures shown? СН3...
Question 6 8.34 pts Which term best describes the relationship between the two structures shown? СН3 ОН -CH3 -OH HO H HO- CH3 CH3 diastereomers enantiomers meso, and identical constitutional isomers identical, but not meso
14) Which of the following terms best describes the stereochemical relationship of compounds shown below in...
14) Which of the following terms best describes the stereochemical relationship of compounds shown below in Fischer notation? Clationship of the two CH3 Cats H HCI BAH Cats CH3 A) enantiomers B) diastereomers C) constitutional isomers D) cis/trans - isomers E) meso - same structure 15y What term describes the structural relationship between cis-1.2-dimethylcyclopentane and trans-1,2-dimethylcyclopentane? A) not isomers B) constitutional isomers C) enantiomers D) diastereomers E) conformers 16) How many diastereomers are there of the molecule shown below? ÇOZH...
1. Complete the following reaction. H,PO OH opo, ub. 2. Which term best describes the mechanism...
1. Complete the following reaction. H,PO OH opo, ub. 2. Which term best describes the mechanism for the reaction in #1? d. E2 b. Sn2c. El a. Snl 3. In IR spectroscopy, where does a C-H stretch from a sp2 carbon occur? a. 3400 cm 6. 3050 cm c. 2950 cm d. 2250 cm 4. Which piece of glassware below is a bent vacuum adaptor?
Question 1 (6 points) Predict the major product(s) of the following reaction. hv ? Bra x...
Question 1 (6 points) Predict the major product(s) of the following reaction. hv ? Bra x Br Br Br BI III IV 11 O a) IV Ob) III Oc) 1 and 11 d) 11 e) 1 Question 15 (6 points) Predict the major product(s) of the following reaction. hv ? Br2 torerna 1 HII IV a) I and IV b) ill and V c) O d) v e) II and IV Question 16 (6 points) Which term most accurately describes...
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(10 points) Write the letter ONLY of the term below that best matches the given definition: 10 a). Heterolytic bond breakage d). Electrophile g). Homolytic bond breakage j). Pro-R k). Substitution b). Si face e). Polar reaction c). Nucleophile f). Pro-S i). Elimination reaction j). Addition reaction m). Differential h). Radical reaction i). Re face 1). Dimer A process that involves symmetric bond breaking and bond making This occurs when both bonding electrons remain with one product fragment. A...
11. Which of the following best explains why the synthetic route shown below would be unsuccessful? 2) NaNH2 3) (CHs)hCBr A) The alkynide anion is not a strong enough nucleophile to react with 1-bromopropane in step 1 m amide is not a strong enough base to deprotonate the terminal alkyne in step anion formed by reaction with sodium amide will facilitate an E2 (rather C) The alkynide than SN2) reaction with t-butyl bromide. 5oth substtution reactions will occur on the...
3. Which of the following best describes the general reaction type exemplified by peptide bond formation? O Electrophilic aromatic substitution O Nucleophilic addition O Proton transfer (Brønsted acid-base reaction) O Nucleophilic acyl substitution O Electrophilic addition
Indicate whether the following reaction, mechanism not shown, involves C O or O-H bond cleavage of the alcohol molecule. HBr "SN1-like" BrH H :0; 3 alkyl bromide 2 alcohol O c-O bond cleavage O o-Hbond cleavage Both C-O and O-H bond cleavage.
Question 11 (3 points) Which of the following best describes the reaction shown below? H,SO HO OH hydrogenation hydration neutralization hydrolysis dehydration ORI
1) A chemical reaction and a table of bond dissociation energies are shown below. H3C H НАС + H2O HOZCHz H2C H acid HzC catalyst Bond BDE (KJ/mol) Bond BDE (KJ/mol) Csp3-H 410 Csp2-Csp2 sigma 418 Csp2-H 427 Csp2-Csp2 pi 264 Csp-H 523 C-O sigma 355 Csp3-Csp3 368 C-O pi 261 Csp2-Csp3 418 HO-H 460 a) Calculate the enthalpy change (AH) for the reaction. Remember to include the sign and units. b) If you touched the outside of the reaction...
Question 6 8.34 pts Which term best describes the relationship between the two structures shown? СН3 ОН -CH3 -OH HO H HO- CH3 CH3 diastereomers enantiomers meso, and identical constitutional isomers identical, but not meso
14) Which of the following terms best describes the stereochemical relationship of compounds shown below in Fischer notation? Clationship of the two CH3 Cats H HCI BAH Cats CH3 A) enantiomers B) diastereomers C) constitutional isomers D) cis/trans - isomers E) meso - same structure 15y What term describes the structural relationship between cis-1.2-dimethylcyclopentane and trans-1,2-dimethylcyclopentane? A) not isomers B) constitutional isomers C) enantiomers D) diastereomers E) conformers 16) How many diastereomers are there of the molecule shown below? ÇOZH...
1. Complete the following reaction. H,PO OH opo, ub. 2. Which term best describes the mechanism for the reaction in #1? d. E2 b. Sn2c. El a. Snl 3. In IR spectroscopy, where does a C-H stretch from a sp2 carbon occur? a. 3400 cm 6. 3050 cm c. 2950 cm d. 2250 cm 4. Which piece of glassware below is a bent vacuum adaptor?
Question 1 (6 points) Predict the major product(s) of the following reaction. hv ? Bra x Br Br Br BI III IV 11 O a) IV Ob) III Oc) 1 and 11 d) 11 e) 1 Question 15 (6 points) Predict the major product(s) of the following reaction. hv ? Br2 torerna 1 HII IV a) I and IV b) ill and V c) O d) v e) II and IV Question 16 (6 points) Which term most accurately describes...
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