Question

Spectroscopy Unknown. The spectra and data provided were obtained from a pure organic molecule.

For 1H NMR Spectra, the integral is given in number of hydrogens (#H) or as a relative ratio. Important coupling constants (J-values) are listed next to the peaks for some examples. For some spectra, an inset (grey box) is also given showing a “zoom-in” on an important part of the spectrum.

Unknown number: 2111 Callam/Paul Chemistry 2540 Spectroscopy Unknown - 25 points Information: Each spectra below was obtained from a pure compound Mass Spectrum parent peaks (M) wested for all examples. R peaks listed are strong is) unless otherwise indicated for signals above 1500 cm 'W NMR Spectra, the integral is given in number of hydrogens ) or as a relative ratio. Important coupling constants U-values) are listed next to the peaks for some examples. For some spectra, an inset grey box is also given showing a "zoomit" on an important part of the spectrum Mass Spectrometry (not shown): [M] =210 m/z Infrared Spectroscopy (not shown): 3076,3065, 1668, 1662, 1595, 1580, 1451, 1212 cm 'H Nuclear Magnetic Resonance. 4H 2H 4H " Nuclear Magnetic Resonance. 200 180 160 140 120 100 80 60 40 20

Answer 1

Hi Dear Friend, the unknown is Benzil

IR:

3076, 3065 cm-1 are due to aromatic sp2 =C-H stretch

1668, 1662 cm-1 are due to α,β - unsaturated ketone C=O stretch

1595, 1580, 1451 cm-1 are due to aromatic sp2 C=C stretch

1212 cm-1 is due to C-O stretch

HNMR & CNMR analysis, assignment along with simulated with my NMR software screenshot's are also attached.

F Chemical structure with hydrogen exploded = = = = = Paste or drop a molfile or SMILES Chemical structure with hydrogen explode J (Hz) 200 Drop or paste a jcamp file List of signals Assignm... Delta 19,23 7.631 18,20,22,24 7.453 16,17,21,25 8.011 7.36 1.49 Help ? Nb H 2 4 4 Mult tt dddd dddd 8.43 7.36 1.420... 8.43 1.72 1.490.... Η Click to superimpose Nucl... Solvent Expe... Filen. O HAH {E * - D SI I HH 1H NMR: 0 7.45 (4H, dddd, J = 8.4, 7.4, 1.4, 0.4 Hz), 7.63 (2H, tt, J = 7.4, 1.5 Hz), 8.01 4 dddd, J = 8.4, 1.7, 1.5, 0.4 Hz). 1H NMR spectra - Double click to zoom out, SHIFT + double click to zoom out by step, SHIFT + drag to move spectrum BE OO + OZOLI O OOIñao - 40 2.04.0 Simulate spectrum Advanced options Frequency: 400 - From: ppm To: 11 ppm Hz Line width: 1 Number pointogal . o (opm) predictedSpectrum Download al —

Molfile or SMILES Chemical structure with hydrogen exploded 6 (ppm) Paste or drop a molfile or SMILES Help 129.8 129.8 129.8 Draw a chemical structure to predict O NEW X R + D x < -- = = AOOOOOFG 0 o НН 129.8 193.0 I 193.0 H 1285 I Η I Drop or paste a jcamp file | 13C NMR spectra BO Calculate spectrum 200 150 100 0 (ppm)

Unknown number: 2111 Callam/Paul Chemistry 2540 Spectroscopy Unknown - 25 points Information: Each spectra below was obtained from a pure compound Mass Spectrum parent peaks (M) wested for all examples. R peaks listed are strong is) unless otherwise indicated for signals above 1500 cm 'W NMR Spectra, the integral is given in number of hydrogens ) or as a relative ratio. Important coupling constants U-values) are listed next to the peaks for some examples. For some spectra, an inset grey box is also given showing a "zoomit" on an important part of the spectrum Mass Spectrometry (not shown): [M] =210 m/z Infrared Spectroscopy (not shown): 3076,3065, 1668, 1662, 1595, 1580, 1451, 1212 cm 'H Nuclear Magnetic Resonance. SH O 4H 2H 4H PPM " Nuclear Magnetic Resonance. 314 200 180 160 180 120 100 80 60 40 20

Hope this helped you!

Thank You So Much! Please Rate this answer as you wish.("Thumbs Up")