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- With reference to structure A, label structure B as an identical compound, a constitutional isomer, a resonance structure, or none of the above. Select the single best answer. CI 519 O Constitutional isomer O Resonance structure O Identical compound O None of the above3. Which of the following information is primarily obtained from infrared spectroscopy? A) arrangement of carbon and hydrogen atoms in a compound B) molecular weight of a compound C) any conjugated t system present in a compound D) functional groups present in a compound E) all of thesewhat makes aromatic and aliphatic ethers different from each other in mass spectrometry
- Propose a structure consistent with each set of data. a.a compound that contains a benzene ring and has a molecular ion at m/z = 107 b.a hydrocarbon that contains only sp3 hybridized carbons and a molecular ion at m/z = 84 c.a compound that contains a carbonyl group and gives a molecular ion at m/z = 114 d.a compound that contains C, H, N, and O and has an exact mass for the molecular ion at 101.08416. Draw Hhe stricture of Compound Y. Compound Y 03 2. Zn, Hz0" t.Three liquid samples of known masses are heated to their boiling points with the use of a heater rated at 500.0 W. Once the boiling points of each sample are reached, the samples are heated for an additional 4.96 min, which results in the vaporization of some of each sample. After 4.96 min, the samples are cooled and the masses of the remaining liquids are determined. The process is performed at constant pressure. The results are recorded in the table. Liquid CH₂OH Boiling point (°C) 64.5 C4H10 -1.00 C6H6 80.1 Initial mass (g) Final mass (g) 465.2 340.37 496.1 95.69 683.6 339.68 Calculate the molar enthalpy of vaporization, AHvap, and the molar entropy of vaporization, ASvap, for each sample. Assume that all of the heat from the heater goes into the sample. 35856.63 AH vap of CH₂OH: Incorrect kJ mol
- For each compound shown below, convert the structure to zig-zag (line) notation. preckie H Н. HO ОН ČH3 (a) CH3CH2 CH3 H NH2 (b) Br H. CH2CH2CH33. Determine how many DBE in each of the following compounds. C4H₂ONCI₂Draw 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 Experiment
- Identify the IR and analyze the mass spec and find the working structure and NMRWhat distinguishes the mass spectrum of 2,2-dimethylpropane from the mass spectra of pentane and isopentane?QUESTION 1 consistent with Which of the following spectroscopic measurements cyclohexanecarbaldehyde? is not O A. H-NMR: a doublet (J = 1.3 Hz) at 9.6 ppm O B. MS: a parent peak at m/z 98. O C. C-NMR: a peak at 204.7 ppm that has 1 H attached OD. IR: peaks at 2856 cm1 (6% transmittance); 2809 cm1 (37%); 2705 cm1 (35%), and 1727 cm-1 (5%).