EHT and CNDO/2 calculations on benzocyclobutenylidene (6) are described. Flash pyrolysis of the tosylhydrazone salt 7 affords benzocyclobutene and o-xylene in low yield, along with the formal syn and anti carbene dimers 13 and 14. Condensed-phase reactions were achieved by photolysis of the salt 15. Benzocyclobutenylidene (6) gave rise to the formal carbene dimers 17 and 18. Insertion of carbene 6 into the carbon-hydrogen bonds ...
![8,8-dichlorobicyclo[4.2.0]octa-1,3,5-triene Structure](https://image.chemsrc.com/caspic/260/68913-13-3.png)
![sodium 2-(3,5-dimethylbicyclo[4.2.0]octa-1,3,5-trien-7-ylidene)-1-tosylhydrazin-1-ide Structure](https://image.chemsrc.com/caspic/079/72610-67-4.png)
![Bicyclo[4.2.0]octa-1,3,5-trien-7-one,3,5-dimethyl-,2-(3,5-dimethylbicyclo[4.2.0]octa-1,3,5-trien-7-ylidene)hydrazone Structure](https://image.chemsrc.com/caspic/466/20643-22-5.png)
