Identifying Structures from Spectra

Related BrainMass Solutions

• Identification of unknown structures using UV, IR, and NMR

  Using the spectra and justification, find the structures of the unknowns. The spectra include IR, UV, Mass Spec, and H and C NMR. Please see the attached file for the complete solution for structures of the unknowns for #19 and #39.

• Stereoisomeric Relationships

  However, both of the violet compounds exhibit three methyl resonances(als odoublets) in their proton NMR spectra. a) Structures of two of the four isomers of tris(alaninato)cobalt(III) are shown below.

• Mass Spectra Fragmentation

  13335 Structures and fragmentation patterns in mass spectra Suggest structure fragmentation patterns that account for the following observed peaks in the mass spectra.

• Deriving Unknown Chemical Compound

  7.1 ppm and 7.5 ppm both indicate one neighboring hydrogen atom, possibly from an aromatic ring.

• MS Spectrum and NMR Spectra

  The 1H and 13C NMR spectra of A and B are given attached. a) Determine the structures of isomers A and B.

• Explain why the 3-pentanol 13C-NMR spectrum contains three peaks while the trans and cis-2-pentene spectra contain five peaks

  There are no identical carbons in these structures. Draw them out and you'll see this fact.

• Cobalamin complex

  A discussion of identifying brown solids in the absorbance spectra is also included.

• Draw structure for compound given formula and 1HNMR spectrum

  140795 Step by step instructions for solving structures based on NMR spectra. Draw the structure for the compound with formula C10H12O2 and the attached proton NMR spectrum. Please see the attached file.

• Identifying an unknown liquid via infrared spectrum.

  Also, please attach a IR spectra from the SDBS spectral database for me to compare your answer. The liquid is soluble in water and has a boiling boing somewhere between 120-125 degrees Celsius.