Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Energy & Fuels called Protonated Nitrogen Structure in 15N-Labeled Model Coal Investigated by Solid-State 1H-15N Double-CP NMR Experiments under Ultrafast Magic-Angle Spinning, Author is Okushita, Keiko; Hata, Yuki; Sugimoto, Yoshikazu; Takahashi, Takafumi; Kanehashi, Koji, which mentions a compound: 2199-44-2, SMILESS is O=C(C1=C(C)C=C(C)N1)OCC, Molecular C9H13NO2, Computed Properties of C9H13NO2.
The nitrogen structure in coals has been focused on as a key factor for reducing NOx. Solid-state NMR (NMR) with high spectral resolution can be an effective tool for analyzing the nitrogen structure of coals once higher sensitivity is achieved in the future. To investigate the nitrogen structure in coals and coal-related mols., we acquired quant. 15N magic-angle spinning (MAS) NMR spectra of 15N-labeled synthesized coals produced from three different types of 15N-reagents. There were some variations in the relative peak intensity ratios of 15N MAS NMR spectra of the three model coals; in particular, the 15N-uracil-origin model coal showed a remarkable difference. Then, we elucidated the chem. environment around the 15N nuclei in the synthesized 15N-labeled coals using 1H-15N double cross-polarization techniques under the ultrafast MAS condition. From the 2D NMR results, it was clarified that there exist not only pyrrolic nitrogen groups but also amide-type nitrogen functional groups in the 1H-15N bonded region of the model coal with a sub-bituminous-level degree of carbonization.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com