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CHEM 2320 > TEST 1 > Flashcards

TEST 1 Flashcards

1
Q

Mass spec uses

A

find molecular weight and fomula

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2
Q

mass spec uses what to work

A

high energy electrons bombard the compound and fragment it

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3
Q

M peak

A

weight of molecule on graph

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4
Q

Base peak

A

tallest peak

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5
Q

mass spec only detects what

A

charge particles

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6
Q

chlorine on mass spec

A

3:1 ratio
35 & 37

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7
Q

bromine on mass spec

A

1:1 ratio
79 & 81

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8
Q

aldehydes and ketones in mass spec

A

alpha cleavage

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9
Q

alcohols in mass spec

A

alpha cleavage and dehydration (lose h2o, 18 amu from m peak)

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10
Q

amines in mass spec

A

alpha cleavage

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11
Q

mass spec m/z meaning

A

mass to charge ratio

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12
Q

DOU equation

A

((2C+2)-H-X+N)/2

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13
Q

C13 nmr detects what

A

only c13

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14
Q

1-2 additions

A

occur in conjugated dienes
kinetic product

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15
Q

1-4 additions

A

occur in conjugated dienes
thermodynamic product, hydrogen bonds to one end, the double bond moves then the carbocation end is taken by the halogen

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16
Q

diel alder reactions

A

happens between a s-cis double bond and another double bond

17
Q

bromine bonding and radicals

A

bromine & radicals only bond to the weakest H bond in the compound. So 3>2>1. 1 being the strongest

18
Q

chlorine bonding and radicals

A

bonds anywhere in 1:1 ratio

19
Q

M+1 peak

A

isotopic peak

20
Q

what makes a compound IR active

A

assymetrical stretches/rotations

21
Q

hookes law

A

stronger bonds-stronger frequency absorbed

22
Q

what indicates alkanes on mass spec

A

increments of 14 between each peak

23
Q

on hydrogen nmrs, what doesnt show up correctly

A

always check the number of peaks. if there is to few number of peaks for the correct number of hydrogen, it is likely it will be bonded to a O or N

CHEM 2320 (3 decks)

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