The author of 《Ground Triplet Spirobiradical: 2,2′,7,7′-Tetra(tert-butyl)-9,9′(10H,10’H)-spirobiacridine-10,10′-dioxyl》 were Kanetomo, Takuya; Ichihashi, Kana; Enomoto, Masaya; Ishida, Takayuki. And the article was published in Organic Letters in 2019. COA of Formula: C5H11NO2 The author mentioned the following in the article:
A new spirobiradical, 2,2′,7,7′-tetra(tert-butyl)-9,9′(10H,10’H)-spirobiacridine-10,10′-dioxyl, was prepared The crystallog. anal. clarified the D2d mol. structure, suggesting the degeneracy of SOMOs. The magnetic study revealed that intramol. ferromagnetic coupling was operative with 2J/kB = +23(1) K. To the best of our knowledge, the ferromagnetic coupling parameter is the largest ever reported for a paramagnetic spiro compound The experimental process involved the reaction of tert-Butyl carbamate(cas: 4248-19-5COA of Formula: C5H11NO2)
tert-Butyl carbamate(cas: 4248-19-5) belongs to anime. Nitrous acid converts secondary amines (aliphatic or aromatic) to N-nitroso compounds (nitrosamines): R2NH + HNO2 → R2N―NO. Some nitrosamines are potent cancer-inducing substances, and their possible formation is a serious consideration when nitrites, which are salts of nitrous acid, are present in foods or pharmaceutical preparations. Tertiary amines give rise to nitrosamines more slowly; an alkyl group is eliminated as an aldehyde or ketone, along with nitrous oxide, N2O.COA of Formula: C5H11NO2
Referemce:
Ester – Wikipedia,
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