DAT chemistry 9 - spectroscopy

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Last updated 5:24 AM on 6/4/26
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16 Terms

1
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What happeneds to bonds when they are hit with light

they wiggle or stretch

<p>they wiggle or stretch</p>
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What is UV spectroscopy used for

conjugated double bonds

<p>conjugated double bonds</p>
3
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What is mass spectromoetry used for

Determining molecular weight

<p>Determining molecular weight </p>
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how does mass spectrometry work

electrons bombard a molecule, and then the amount of time it takes to thravel the tube is measured. This then is convereted into molecular weight

<p>electrons bombard a molecule, and then the amount of time it takes to thravel the tube is measured. This then is convereted into molecular weight </p>
5
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Parent peak

M peak

The molecule with an electron without any fragmentation

<p>M peak </p><p>The molecule with an electron without any fragmentation </p>
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base peak

the tallest peak, the molecule that is the most stable

<p>the tallest peak, the molecule that is the most stable </p>
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whats the problem with bromine in IR?

50% of bromines have a weight of 79 and 50% have a weight of 81

1:1 Ratio

<p>50% of bromines have a weight of 79 and 50% have a weight of 81</p><p>1:1 Ratio</p>
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whats the problem with chlorine in IR?

75% are chlorine 35, and the other 25% is chlorine 37

3:1 ratio

<p>75% are chlorine 35, and the other 25% is chlorine 37</p><p></p><p>3:1 ratio</p>
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M , M+2, And M+4 ratio

3:4:1

<p>3:4:1</p>
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Alkane formual

Cn H 2n+2

<p>Cn H 2n+2 </p>
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alkene formula

Cn H2n

<p>Cn H2n</p>
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alkyne formula

Cn H2n -2

<p>Cn H2n -2 </p>
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cycloalkane formula

Cn H2n

<p>Cn H2n</p>
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Degrees of unsaturation formula

C - h/2 - Halogens/2 +N/2 +1

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What is NMR used for

See what kinds of carbons are in a structure

<p>See what kinds of carbons are in a structure </p>
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Where does the scale go in HNMR

to the left , more possitive H

<p>to the left , more possitive H</p>