[References The mass spectrum of compound A shows the molecular lon at m/z 85, an M + 1 peak at m/z 86 of approximately 6% abundance relative to M, and an M + 2 peak at m/z 87 of less than 0.1% abundance relative to M. Assuming that compound A has only C, H, and one N atoms, determine the molecular formula, and then draw a possible structure if compound A has an IR absorption at 1620-1680 cm 1, 2 absorptions at 3280-3450 cm¹, and a (q, 1H) absorption at 4.6-5.7 8 in the ¹H-NMR spectrum.

Identify each peak (peak splitting and ppm) and identify the unknown compound. Please draw the structure, and explain why its that structure. Attached are the spectra for the unknown compound.

A student performed a series of reactions and obtained the spectral data provided. The reaction sequence is shown below.. What are the structures for A, B, C, and D? Compound B NMR (relative integrated areas below peaks) CH;CH,O°N 1. BHTHF N-bromosuccnimide A CH;CH,OH B 2. H,O,/OH- D hv reflux Compound A NMR (relative integrated areas below peaks) PPM 5 Compound B IR INFRARED SPECTRUM PPM 5 1 6 0.8 Compound A IR INFRARED SPECTRUM 0.6 0.8 0.4 0.4 0.2- 3000 2000 Wavenumber (cm-1) 1000 The MS of compound B shows an M+ peak at 198 and an M+2 peak at 200 with a relative abundance of 1:0.97 2000 Wavenumber (cm-1) 3000 1000 Transmitance Relative Transmittance

The proton nmr is  1H Septet between 3.5 and 4 3H singlet at about 3.4 6H doublet at about 1.2

The mass spectrum for acetophenone is shown below. a) Where does the molecular ion show up? ?) b) Which peak is the base peak? ? 1) The mass spectrum for acetophenone is shown below. Relative Intensity 100- 80- 20- acetophenone 0-tyttim 20 10 30 40 50 60 77 trommlilily 70 m/z 80 90 100 105 Ć 110 120 120 a) Where does the molecular ion show up? (m/z = ?) b) Which peak is the base peak? (m/z = ?) c) Draw the structure of the charged species responsible for the peak at m/z = 120. d) Draw the structure of the charged species responsible for the peak at m/z = 105. e) Draw the structure of the charged species responsible for the peak at m/z = 77.

What best describes the IR spectrum of NaCl? A broad peak at 3400 cm-1 A strong peak at 1700 cm-1 No peaks are observed  A weak peak just above 3000 cm-1

A compound and its ¹H-NMR spectrum are shown below. Assign peak 1 and peak 2 in the spectrum to the hydrogen(s) labeled in red. i. a H3C- 10 C4H8O₂ Compound C b c -O—CH,CH3 2006 Brooks/Cole Thomson Submit Answer C 9 ↑ Which labeled hydrogen(s) correspond to each peak? peak 1: peak 2: 8 7 6 2H 5 Chemical Shift (8) Peak 3 Retry Entire Group 6 more group attempts remaining 3. 3H Peak 2 3H Peak 1 0 ppm

A ¹H NMR spectrum of the molecule shown below was prepared in deuterated acetone. D₂O was added to the sample and then another spectrum was obtained. Identify the peak(s) that no longer appear in the spectrum. H H ||II H A) I B) II C) III D) I and II E) II and III