NEUGEBAUER, FRANZ A.;FISCHER, HANS;CROCKETT, ROWENA;KRIEGER, CLAUS, J. CHEM. SOC. PT 2. PERKIN TRANS.,(1990) N, C. 1619-1626
作者:NEUGEBAUER, FRANZ A.、FISCHER, HANS、CROCKETT, ROWENA、KRIEGER, CLAUS
DOI:——
日期:——
2,5-Dihydro-1,2,3,5-thiatriazole1-oxides, 2H-1,2,3,5-thiatriazol-1-ium salts, and 2,5-dihydro-1,2,3,5-thiatriazol-5-yl radicals. X-Ray molecular structure of 2,5-dihydro-2,4-diphenyl-1,2,3,5-thiatriazole 1-oxide and 2,4-diphenyl-2H-1,2,3,5-thiatriazol-1-ium bromide
作者:Franz A. Neugebauer、Hans Fischer、Rowena Crockett、Claus Krieger
DOI:10.1039/p29900001619
日期:——
5-dihydro-1,2,3,5-thiatriazole 1-oxides (5a–g). X-Ray analysis of compound (5c) confirmed the 2,5-dihydro structure which is also the predominant tautomer in solution. Reaction of compounds (5a–g) with phosphorus pentachloride or pentabromide led to the formation of yellow 2H-1,2,3,5-thiatriazol-1-ium salts (6a–h), the structure being established by X-ray structure analysis of compound (6h). Reduction
N-取代的氨甲dra(4a - g)与亚硫酰氯反应生成2,5-二氢-1,2,3,5-噻三唑1-氧化物(5a - g)。化合物(5c)的X射线分析证实了2,5-二氢结构,其也是溶液中的主要互变异构体。化合物(5a – g)与五氯化磷或五溴化磷的反应导致形成黄色的2 H -1,2,3,5-噻三唑-1-鎓盐(6a - h),该结构通过X射线确定化合物(6h)的结构分析。减少化合物(6a – h)在具有钠或钾金属的1,2-二甲氧基乙烷中容易生成2,5-二氢-1,2,3,5-噻三唑-5-基(1a – g),并使用ESR,EN DOR和常规方法进行了研究。三重共振光谱法。结果导致对所有耦合常数的完整分析和完全赋值。
ESR and ENDOR study of 2,3-dihydro-1-oxo-1λ4,2,3,5-thiatriazol-3-yl radicals
作者:Franz A. Neugebauer
DOI:10.1002/mrc.1260300117
日期:1992.1
1‐oxides with thermally formed bis(4‐methylphenyl)aminyl generated 2,3‐dihydro‐1‐oxo‐1λ4,2,3,5‐thiatriazol‐3‐yl radicals. ESR, ENDOR and triple resonance studies in combination with 15N labelling yielded the magnitude and assignment of all 1H and 14N hyperfine coupling (HFC) constants. The radicals have a basic five‐π‐electron amidrazon‐2‐yl structure with the highest spin density at N‐2.
2,5-二氢-1,2,3,5-噻三唑1-氧化物与热形成的双(4-甲基苯基)氨基脱氢生成2,3-二氢-1-氧代-1λ4,2,3,5-噻三唑-3-基自由基。ESR、ENDOR 和三重共振研究结合 15N 标记产生了所有 1H 和 14N 超精细耦合 (HFC) 常数的大小和分配。自由基具有基本的 5-π-电子脒腙-2-基结构,在 N-2 处具有最高的自旋密度。