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- What are the peaks and chemical shifts in this H NMR? What is the major product and minor product in the H NMR (between 1-methylcyclohexene and 3-methylcyclohexene)? What was the percentage od the major and minor products in the product picture (which is the H NMR)? This is like the ratio between 1-methylcyclohexene and 3-methylcyclohexene.5 This question relates to the1H-NMR spectrum of an alkane and two alkenes. How many proton environments are there in 2-methylbut-2-ene? How many proton environments are there in 1-bromo-4-chlorobutane? How many proton environments are there in trans-2-pentene What are the multiplicities of each proton environment in 2-methylbut-2-ene? What are the multiplicities of each proton environment in 1-bromo-4-chlorobutane? What are the multiplicities of each proton environment in trans-2-pentene?(Knoevenagel) - Identify all the peaks from the IR spectrum. Be sure to list the cm-1 and the bond that corresponds to each peak.
- Assign the stereochemical configuration (R or S) for each molecule. Show your work, indicating clearly which groups are assigned which priorities (#1 through #4) (e.g. by including the priority # directly adjacent to one of the atoms in that group).Draw all the constitutional isomers of octane. Name each one. For each isomer: a. State the number of different sets of carbon in the structure b. State whether each set of equivalent carbons would produce an up or down signal in the DEPT-135 NMR experiment. c. State whether each set of equivalent carbons would produce a singlet, doublet, triplet, or quartet in the Off-Resonance Decoupled ExperimentBelow are three MS spectra, Spectra 1, 2, and 3. Each of this mass spectrum corresponds to either Compound A (contains one Cl in the molecular formula), Compound B (one I in the molecular formula), and Compound C (one Br in the molecular formula). Identify which spectra corresponds to which compound. Provide explanations for your choices.
- What are the most characteristic peaks to look for in the infrared spectrum of the product? (Williamson Ether Synthesis Reaction) a) a strong peak at 2200 cm-1 b) one strong peak at 1250 cm-1 c) two strong peaks at 1100 and 1200 cm-1For each compound given below, determine whether the two labeled hydrogens are homotopic, enantiotopic, or diastereotopic.From the spectra A-J and in the NMR Spectra tile, select the letter that corresponds to 1. methyl butanoate2. benzaldehyde3. 1-chlorobutane4. 1-chloro-2-methylpropane5. butan-2-one6. propan-2-ol7. propanal
- Determine the appropriate configuration (R, S, E, or Z) for each of the following compounds.For each structure, write the corresponding configuration in the box drawn next to the compounds. explain each step.syringaldehyde H1 NMR structure with all H atoms and label itDraw the structures for the ethanol then circle the carbons on the structure and correlate the 13 C's to the resonances (peaks) on the 13