The author of 《Crystal Structures of Spiro Derivatives Including 6,10-Dioxaspiro[4.5]decane-7,9-dione Group and Their Spectral Studies》 were Zeng, Wulan; Wang, Xia. And the article was published in Journal of Chemical Crystallography in 2019. Formula: C5H13NO2 The author mentioned the following in the article:
A new intermediate, I (C22H30N2O8) was attained by reaction of 6,10-dioxaspiro[4.5]decane-7,9-dione with 1,1-dimethoxy-n,n-dimethyl-methanamine in ethanol. The two oxaspirocyclic compounds, 8-[[(2-methylphenyl)amino]methylene]-6,10-dioxaspiro[4.5]decane-7,9-dione (2-C16H17NO4) and 8-[[(2-methylphenyl)amino]methylene]-6,10-dioxaspiro[4.5]decane-7,9-dione (3-C16H17NO4) were prepared by adding 2-methylbenzenamine and 3-methylbenzenamine into to the ethanol solution of I, resp. Two crystals (I and C16H17NO4 ) were determined by single-crystal X-ray diffraction. The compound of I includes one (C5H13N2)+ cation and one (C17H17O8)- anion, which indicates it is a salt. There is no classical hydrogen bonds in I. However, there is one kind of N-H···O intramol. interactions and one kind of C-H···O intermol. interactions in (2-C16H17NO4). In addition, the fluorescence spectra of 2-C16H17NO4 and 3-C16H17NO4 in dilute ethanol were studied, which they exhibit purplish red emission and reddish purple emission, resp. In the experimental materials used by the author, we found N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Formula: C5H13NO2)
N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Formula: C5H13NO2
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem