parallel bonds
DESCRIPTION
parallel bonds. parallel bonds. parallel bonds. Drawing Cyclohexane. equatorial bonds. axial bonds. equatorial bonds. axial bonds. 4. 6. 5. 1. 3. 2. Numbering Cyclohexane. Start anywhere and number consecutive carbons. Tetrahedral Carbons in Cyclohexane. 1. tetrahedral carbon. 2. - PowerPoint PPT PresentationTRANSCRIPT
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parallel bondsparallel bondsparallel bonds
Drawing Cyclohexane
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equatorial bonds
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axial bonds
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equatorial bonds axial bonds
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1 2 3
4
5
6
Start anywhere and number consecutive carbons.
Numbering Cyclohexane
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tetrahedral carbon
1
Tetrahedral Carbons in Cyclohexane
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tetrahedral carbon
2
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tetrahedral carbon
3
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tetrahedral carbon
4
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tetrahedral carbon
5
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tetrahedral carbon
6
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1 2 3
4
5
6
6 axial bonds (green) (3 straight up; 3 straight down)
6 equatorial bonds (blue) (3 slightly up; 3 slightly down)
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12
Disubstituted Isomers of Cyclohexane
and . . .
two equatorial substituents (purple)name of cpd: trans-1,2-di . . . cyclohexane
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two axial substituents (purple)name of cpd: trans-1,2-di . . . cyclohexane
1
2
are conformational isomers of one another.
Also, . . .
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1 3
and . . .
two equatorial substituents on carbons 1 & 3 name of cpd: cis-1,3-di . . . cyclohexane
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1
3
two axial substituents on carbons 1 & 3 name of cpd: cis-1,3-di . . . cyclohexane)
are conformational isomers of one another.
Furthermore, . . .
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1
4
two equatorial substituents on carbons 1 & 4 name of cpd: trans-1,4-di . . . cyclohexane)
and . . .
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1
4
two axial substituents on carbons 1 & 4name of cpd: trans-1,4-di . . . cyclohexane
are conformational isomers of one another.
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flip this C above the plane
flip the other C below the plane
hold red bonds in a plane
the other chair conformation
you get
Chair Conformations of Cyclohexane
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number carbons in thisconformation
12
3
45
6
number the same carbons in this conformation 1
23 4
56
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12
3
45
6
1
23 4
56given the plane
formed by carbons2, 3, 5, and 6
C1 is below the planeand ...
C4 is above the plane,while...
C1 is above the plane and...
C4 is below the plane.
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21 3
456
2
61
4
5
3equatorial bondshere become ...
axial bonds here, and...equatorial bonds here.
axial bondshere become ...
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1 2 3
4
5
6
Equatorial bonds alternate being above and below the axial bonds on a given carbon atom
above
above
below
below
below
above
and . . .
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1 2 3
4
5
6
axial bonds alternate being above and below the equatorial bonds on a given carbon atom.
above
below
belowbelow
above
above
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The End
And what a nifty cool story it was . . .