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Chemistry > Analytical Techniques > Flashcards

Analytical Techniques Flashcards

1
Q

Analytic Techniques: Chemical Analysis

What’s the purpose of using Analytic Techniques?

A

To find the structure of an unknown sample of a organic compound

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2
Q

Analytic Techniques: Chemical Analysis

What’s the purpose of using Infrared Spectroscopy?

A

Finds different types of bonds in an unknown sample

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3
Q

Analytic Techniques: Chemical Analysis

What’s the purpose of using Mass Spectroscopy?

A

Finds mass of unknown compound

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4
Q

Analytic Techniques: Infrared Spectroscopy

How reliable is Infrared Spectroscopy?

A

Unreliable
↳ there’s some uncertainty

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5
Q

Analytic Techniques: Infrared Spectroscopy

What’s the Absorption Range for an Alcohol (O-H)?

A

3200 - 3600

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6
Q

Analytic Techniques: Infrared Spectroscopy

What’s the Absorption Range for Carboxylic Acids (O-H)?

A

2500 - 3000

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7
Q

Analytic Techniques: Infrared Spectroscopy

What’s the Absorption range for Aldehydes & Ketones (C=O)?

A

1640 -1740

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8
Q

Analytic Techniques: Infrared Spectroscopy

What’s the Absorption Range for Alkanes (C-H)?

A

2850 - 2950

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9
Q

Analytic Techniques: Infrared Spectroscopy

What’s the Absorption Range of Alkenes (C-H)?

A

3000 - 3100

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10
Q

Analytic Techniques: Infrared Spectroscopy

What’s the Absorption Range for Alcohols (C-O)?

A

1000 - 1300

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11
Q

Analytic Techniques: Infrared Spectroscopy

How would u identify an O-H bond?

(alcohol)

A
  • Stretch at around 3000
  • Strong & broad
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12
Q

Analytic Techniques: Infrared Spectroscopy

How would u identify an O-H bond?

(carboxylic acid)

A
  • Stretch between 3000 & 2500
  • Messy
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13
Q

Analytic Techniques: Infrared Spectroscopy

How would u identify a C-H bond?

(alkane or alkene)

A
  • Stretch below 3000
  • Short sharp stretch next to an O-H bond
  • All organics have this
    ↳ they’re HC
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14
Q

Analytic Techniques: Infrared Spectroscopy

How would u identify a C-O bond?

(alcohols)

A
  • Stretch in the fingerprint region
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15
Q

Analytic Techniques: Infrared Spectroscopy

What’s a Fingerprint Region?

A

Any stretch on 1500 & below
↳ isn’t required to be analysed

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16
Q

Analytic Techniques: Infrared Spectroscopy

How would u identify a N-H bond?

(protein)

A
  • Close to O-H region
  • Has a sharper peak
17
Q

Analytic Techniques: Mass Spectroscopy

A

Chemistry (13 decks)

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