[AlphaScent]

Archer posted a paper in another topic and I started to read.  It says racemic-1,2-cyclononadiene.  Can someone point me to a good place to read about chirality of allenes?

[AlphaScent]

Heres a the first paragraph...

At room temperature, 1,2-~cyclononadiene (1)['] will more
or less keep indefinitely. Its dimerisation takes place only at
about 130°C[2]. In this process, the racemic mixture affords
the 1,2-bis(methylene)cyclobutane derivatives cis-2, trans-2,
and 3 in the ratio of 5:10:1, whereas nonracemic 1 gives rise
predominantly to cis-2r3I



Where 1 is 1,2-cyclononadiene..

[Archer]

I don't have a good resource at present but the allenes are axially chiral so if you look down the axis it is similar to binaphthyl compounds.

https://www2.chemistry.msu.edu/courses/cem958/FS04_SS05%5CPredeus-seminar.pdf

Actually this is not bad

[AlphaScent]

Yes, they are.  As soon as I googled and started to read this.  Axial chirality made perfect sense.  Not completely familiar with this concept.  Bout to do me some learning....

Cheers,

Archer

https://www2.chemistry.msu.edu/courses/cem958/FS04_SS05%5CPredeus-seminar.pdf