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25 Cards in this Set
- Front
- Back
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IR tells you...
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types of bonds.
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(IR) Carbonyls absorb at ...
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~1750 cm⁻¹
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(IR) X-axis ranges from...
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400 to 4000 cm⁻¹
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(IR) OH groups absorb at...
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~3300 cm⁻¹ (broad)
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(IR) Amines absorb at...
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~3000 cm⁻¹ (sharp)
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(IR) Is the N-H or C-H peak typically further left?
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N-H
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(NMR) Nuclei align w/ or against ...
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external magnetic fields.
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(NMR) Flipping nuclei alignment to against results in...
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high energy state.
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(NMR) Downfield =
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more deshielded.
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(NMR) De-shielded =
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proximity to e⁻ w/drawing groups.
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(NMR) H bonded to sp³ C puts peak bw...
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0 and 5 ppm.
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(NMR) H bonded to sp² C puts peak bw...
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5 and 10 ppm.
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(NMR) Nuclei w/magnetic moments have...
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odd-numbered masses or odd atomic numbers.
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C NMR ranges up to...
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100 ppm.
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(NMR) Spin-coupled C NMR has...
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splitting.
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(NMR) Spin-decoupled C NMR has...
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no splitting.
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UV-Vis examines...
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conjugated systems.
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Which type of spectroscopy destroys the sample?
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Mass spectroscopy.
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Which types of spectroscopy use light?
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IR, NMR, UV
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What does a mass spectroscopy detector detect?
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mass/charge ratio
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(MS) Base peak represents...
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most abundant ion.
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Parent peak (M+) represents...
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molecular weight of original molecule.
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(NMR) Splitting requires...
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multiple peaks.
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(NMR) When protons are all equivalent, you see...
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no splitting.
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(NMR) Aromatic ring peaks found bw...
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6 and 8 ppm
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