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Author Topic: Hydrazines, which are toxic?  (Read 5728 times)

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Enthalpy

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Re: Hydrazines, which are toxic?
« Reply #15 on: June 25, 2018, 01:31:04 AM »

Thanks wildfyr!

Err, yes, H are implied - but I had to write them in CH2O to distinguish from carbon monoxide.
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Enthalpy

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Re: Hydrazines, which are toxic?
« Reply #16 on: December 23, 2018, 02:47:21 AM »

TheUnassuming hinted (thanks!) at efficient N-N coupling by O2+catalyst or by electrolysis
http://www.chemicalforums.com/index.php?topic=97919.msg345959#msg345959
https://pubs.acs.org/doi/10.1021/jacs.8b05245 and https://pubs.acs.org/doi/10.1021/ja5013323
which achieves molecules as crowded as tetraphenylhydrazine, so cyclopropylmethylhydrazines look accessible. This needs a good path to dicyclopropylamine, as some previous compounds here do.

The dicyclopropyldimethyl would be slightly flammable but a mix with heavier compounds shall improve it and lower the freezing point, the isomers being welcome too.

The Osiris applet estimates that these hydrazines are harmless (but it considers Udmh as slightly carcinogenic).

The seemingly cheap N-N coupling would apply to other compounds here like diazetidyl.

Cyclopropyls are expected to weaken the N-N bond further. Bad for the heat stability, but it may improve the hypergolic ignition with N2O4.

Marc Schaefer, aka Enthalpy
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