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The flashcards below were created by user
tulipyoursweety
on FreezingBlue Flashcards.
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Hydrocarbons like methane (CH4) and hexane (C6H14), as well as compounds that contain only C, H, and O atoms, always have a molecular ion with an ______ mass.
even
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An ____ molecular ion generally indicates that a compound contains nitrogen.
odd
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Nitrogen rule: A compound that contains an ___ number of N atoms gives an ____ molecular ion.
odd, odd |or| even, even
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When the molecular ion consists of two peaks (M and M+2) in a 3:1 ratio, a ___ atom is present.
- Chlorine,
- which has two common isotopes 35Cl and 37Cl
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When the molecular ion consists of two peaks (M and M+2) in a 1:1 ratio, a ___ atom is present.
- Bromine,
- which has two common isotopes, 79Br and 81Br.
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Carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus, fluorine, and iodine have ____ major isotope.
one
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What functional groups absorb between 4000-2500 in an IR spectrum?
- Bonds to hydrogen
- C-H
- O-H
- N-H
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What functional groups absorb between 2500-2000 in an IR spectrum?
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What functional groups absorb between 2000-1500 in an IR spectrum?
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What functional groups absorb between 1500-400 in an IR spectrum?
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Important IR Absorptions
O-H
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Important IR Absorptions
N-H
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Important IR Absorptions
C-H
~3000
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Important IR Absorptions
Csp3 - H
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Important IR Absorptions
Csp2 - H
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Important IR Absorptions
Csp - H
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Important IR Absorptions
CΞC
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Important IR Absorptions
CΞN
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Important IR Absorptions
C=O
- 1800-1650 (often ~1700)
- strong
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Important IR Absorptions
C=C
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Important IR Absorptions
aromatic ring
1600, 1500 medium
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