107552-33-0Relevant academic research and scientific papers
TAUTOMERISM OF BIS(2-BENZOTHIAZOLYL)METHANES
Avendano, Carmen,Ramos, Maria Teresa,Elguero, Jose,Jimeno, Maria Luisa,Bellanato, Juana,Florencio, Feliciana
, p. 1467 - 1473 (2007/10/02)
Tautomerism of dibenzothiazolylmethane (1) and its C-methyl derivative (2) has been studied by 1H nuclear magnetic resonance, ultraviolet and infrared spectroscopy using C,C-dimethyl (3) and N-metyl (4) derivatives as model compounds of the "CH" and "NH" forms, respectively.X-ray diffraction analysis of the "fixed" N-methyl derivative 4 shows that it corresponds to the Z-sE isomer 4b2.The CH tautomers are unstable in solution and they slowly isomerize into a mixture of NH tautomers that depends on the solvent and on the C-substituent (H or CH3).
