Hi everybody and everyone!Quadricyclane
is an energetic hydrocarbon that some people would like to use as guess what - but I checked a few prices for norbornadiene and it seems expensive.
The synthesis would be, if I grasped it properly:
Cyclopentadiene from refineries and acetylene
make norbornadiene by Diels-Alder
and by photoisomerization quadricyclane
(the appended images may be clearer)
is offered at 120$/kg in 100kg amount on one site, but only 36€/0,25L by Merck a decade ago. Is that a realistic price
in tons amounts?
What is expensive there? Is the reaction slow, dangerous...? Could it accelerate
with a pair of chlorines or bromines at proper locations? On the cyclopentadiene or (hopefully not) on the acetylene?
looks rather affordable with a mercury lamp and a sensitizer, but its quantum efficiency is like 1%... As we have a choice of UV lamps now, powerful and at varied wavelengths, I vaguely hope that the proper one without a sensitizer would be more efficient.
Would you know a UV absorption spectrum