1

SECTION 11

(1) CYCLOOCTATETRAENE

G. Deslongchamps, P. Deslongchamps.

J. Org. Chem. 2018, 83, 5751-5755.

(2) WALK REARRANGEMENT

(2018)

(3) CYCLOBUTADIENE

2

(1) CYCLOOCTATETRAENE

3

Structural changes in cyclooctatetraene:

a) ring inversion; b) bond shifting; c) valence bond isomerization

4

Electronic delocalization in s-cis butadiene and conrotatory cyclization

5

Bond shifting and

valence isomerization of COT

6

Thermal and

photochemical

conversion of COT to

semi bullvalene (SB)

7

Thermal and photochemical bond shifting in COT

8

Thermal conversion of tricyclo[3.3.0.02,6]-octa-3,7-diene TOD

into semibullvalene (SB)

9

Photochemical conversion of barrelene (B)

to semibullvalene (SB)

10

Thermal conversion of COT to 3,8-dihydropentalene (11)

11

Ring current in aromatic cyclooctatetraene dianion

12

(2) WALK REARRANGEMENT

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Walk rearrangement of bicyclo[n.1.0]polyenes

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Walk rearrangement of bicyclo[2.1.0]pentene 1

15

Walk rearrangement of Norcaradiene derivatives

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Walk rearrangement of Norcaradiene 2

17

Walk rearrangement of bicyclo[6.1.0]nonatriene system

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Walk rearrangement of bicyclo[6.1.0]nonatriene 3

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(3) CYCLOBUTADIENE