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Organic-Chemistry Questions
Organic-Chemistry Questions
Draw the major product for A,B,C
Write a mechanism for the reaction and label each step
Draw structures of lactol/cyclic hemiacetal or cyclic acetal formed from intramolecular cyclization of the hydroxy aldehydes/ketones
Draw the products formed when the reactions are hydrolyzed with dilute acid
Draw the mechanism for the run and label each step
Draw the acetals/ketals formed in each reaction
Label each compound as acetal, hemiacetal or an ether
Which of the following CMPDs can't be oxidized using PCC?
Draw the structures of the aldehydes or ketones below
4. (50 pts.) Predict a major product for each of the following reactions or reaction sequences.
2. (16 pts.) name the following compounds in an unambiguous manner:
Proposed detailed mechanisms for the reactions below. Thank you!!
why do sodium borohydride and lithium tri-sec-butylborohydride produce the results seen in the table on page 46?
Draw one chair conformation of cis-2-methylcyclohexanol and one chair conformation of trans-2-methylcyclohexanol. Which is more stable?
Propose structures for the following isomeric alcohols that give the 13C NMR spectra below. Assign the carbons to their respective peaks. A table of chemical shifts is located on page 43.
Predict the structure of the compound that gives the spectrum shown below. Upon shaking the sample with D2O, the doublet at 2.2 ppm disappears from the spectrum and the peak at 3.7 ppm simplifies to a clean sextet. Calculate the degree of unsaturation of
The doublets observed for the alkene protons in the NMR spectra of trans-3-chloropropenoic acid and cis-3-chloropropenoic acid have the same chemical shift, but the J value for one is 14 Hz and the other is 9 Hz. Which is the trans acid and which is the c
The 1H NMR for 2,3-dibromobutane has a doublet at 1.8 ppm and a quartet at 4.5 ppm. Draw the compound and assign the peaks in the spectrum to their respective protons.
Provide structures that are consistent with the following 1H NMR spectra. Calculate the degree of unsaturation of each compound first. Assign the protons to their respective peaks.
Use your knowledge of organic chemistry reactions to complete the missing reagents in the following boxes.
Draw 4 resonance structures for the following. Be sure to show all formal charges.
Use the inscribed polygon method and determine ___ for the compound below.
Assume that all the following ring compounds are planar and circle the structures that are aromatic. Label the compounds that are antiaromatic. Use the Hückel rules to determine your answer.
Determine the hybridization of the circled atoms and the number of p electrons that the circled atoms in the compound shown contribute to the aromatic system of delocalized pi electrons.
Circle all allylic carbocations. Then draw resonance hybrids/structures for the allylic carbocations (you do not need to include resonance hybrids/structures with 2 or more formal charges on a given structure).
Construct a simulated H1 NMR spectrum for methyl propanoate. Drag and drop the appropriate splitting patterns into the boxes on the chemical shift baseline, and add integration values above each signal. Splitting patterns and integrations may be used m
Which of the following species are conjugated? Select all that apply.
Identify the best conditions for the reaction.
Draw the structure of the product formed when the dienophile shown below is reacted with 1,3- cyclohexadiene.
When 1,3-cyclopentadiene is treated with HBr, the temperature does not have an influence on the identity of the major product. Explain.
When 1,4-dimethylcyclohepta-1,3-diene is treated with HBr at an elevated temperature, the 1,2 product predominates rather than the 1,4 adduct. Explain and draw the 1,2 and 1,4 products.
Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals. Include a condensed structure to provide your answer.
Use a condensed structure to provide your answer. Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals.
When 3-bromo-2,2-dimethylbutane is treated with potassium tert-butoxide, a single product, A, having the formula C6H12 is formed. When 3,3-dimethyl-2-butanol is treated with sulfuric acid, the major product, B, has the formula C6H12. Given the following N
Draw the two major organic products for the following substitution reaction.
Draw the condensed structure of 2,2-dimethylbutane. b.) Estimate what the 1H NMR spectrum of 2,2-dimethylbutane is expected to look like. c.) Clearly label each proton environments and match each to its signal. d.) Be sure to include appropriate splitting
Propose the structure of a disubstituted geminal alkene that fits the following NMR spectrum.
Propose the structure of a monosubstituted geminal alkene that fits the following NMR spectrum.
Use a condensed structure to provide your answer. Propose a structure for an acyclic alkane having the following spectrum. The results of the DEPT spectra are given following the signals.
How many 1H NMR signals do each of the planar cyclic compounds display?
How many separate peaks would be observed in the 13C spectra of the following compounds? a. 1,2-dinitrobenzene b. 1,3-dinitrobenzene c. 1,4-dinitrobenzene
Propose structures for the following isomeric alcohols that give the 13C NMR spectra below. Assign the carbons to their respective peaks.
Below are the structures of compounds followed by 2 infrared spectra. Using the letters beside each structure, match the infrared spectrum to its correct structure. You must list at least three important absorptions that help identify your structure.
Using the reaction shown below, calculate the percent yield obtained by a student when reacting 5.0 g of 3-methoxysalicylic acid with 3.9 mL of iodomethane in the presence of 10.3 g of potassium carbonate and obtaining 4.5 g of product, 2,3-dimethoxymethy
How many proton (1H) NMR signals does the acrylic compound display?
How many proton (1H) NMR signals does the acrylic compound display?
Organic Chemistry Help
Organic Chemistry
Complete a synthesis for the transformation shown.
Organic Chemistry 2 Questions
Complete the electron‑pushing mechanism for the formation of the major product in the given reaction by adding any missing charges, atoms, bonds, nonbonding electrons, and curved arrows. Predict all the products of the reaction.
Phentermine was approved for sale in the United States in 2012 by the FDA. It is a psychostimulant drug used together with diet and exercise to suppress appetite and treat obesity. Using your knowledge of organic chemistry, draw the major organic intermed
Starting with the compound on the left, devise a synthesis for the compound on the right.
Draw the final product from the six‑step reaction sequence.
Draw the structure of the major product formed in the given reaction when the aromatic aldehyde is present in excess.
Determine mass spectrometry of following compound.
Determine the major organic product for the reaction scheme shown.
Fill in the blanks regarding the synthetic map above. Use names or formulas, as shown in the videos. Pay particular attention to C and D, one of which is a carbonyl with 3 C-atoms, the other, an epoxide.
Determine mass spectrometry of following compounds. How do they compare to one another?
Show how you would accomplish the following multistep conversions. You may use any additional reagents you need.
Organic Chemistry: I need help understanding these questions, please and thank you
Write the condensed structural formula of each of the following compounds:
Use retrosynthetic analysis to design a synthesis on paper for the transformation of 2-chloro-3-methylbutane into 3-methylbutanal as shown below. You'll need six of the following reagents. Order the correct ones in order 1-6. The one you don't use will b
Match the reagent with number of each transformation of alkene
Make at least four (4) synthesis problems with 4 steps or more. Use addition, substitution, and elimination reactions. Try to change the location of substituents or of pi- bonds, and to change the substituents. Have at least one synthesis that uses ALKYLA
Make at least four (4) synthesis problems with 4 steps or more.
2. (6 pts) Provide the necessary reagents for the following transformations. More than one step may be required.
Organic Chemistry Help
Starting from (R)-3-methylhex-1-yne as the substrate at the center of your page, draw a reaction map showing the regiochemical and stereochemical outcome or outcomes for each of the following series of reagents. Name each of your products, including stere
Predict the product of the reaction with a complete curved arrow mechanism
Were your isolated compounds pure based on TLC? If not, with what were they contaminated?
What is this product formed
draw a structure for 3-rthyl-5-methyl-3-heptene
Starting from 3-methylhex-1-ene as the substrate at the center of your page, draw a reaction map showing the regiochemical and stereochemical outcome or outcomes for each of the following series of reagents. Name each of your products, including stereoche
Match the reaction to the Alkyne
Match the reaction to the Alkene
C15T01Q2882 Give the major product(s) of the following reaction.
know the reagents and conditions that lead to given regio- and steriochemical outcomes
choose the sequence of reagents that provides the most efficient synthesis of 1,2-dicholorobutane starting from butane and using any reagents necessary.
Choose the most efficient synthesis of (halomethyl)cyclohexane starting from cyclohexane and using any reagents needed.
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