An environmentally benign, one-pot diazotization and coupling reaction using ChCl:tartaric acid DES at room temperature is described. The bulky tartrate ion renders stability to the diazoniumsalt at room temperature, also evidenced by 1H NMR. The isolated diazoniumsalt is stable and active even after 192 h at room temperature.
描述了在室温下使用ChCl:酒石酸DES进行的环境友好的一锅重氮化和偶联反应。庞大的酒石酸根离子在室温下对重氮盐也具有稳定性,这也由1 H NMR证实。分离出的重氮盐即使在室温下192小时后仍是稳定且有活性的。
Solid-State N–H···O/O–H···N Tautomerism in Resonance-Assisted 1-(Arylazo)-2-Naphthols and Its Through-Space <i>π* ← π</i> Perturbation in TCNQ Cocrystals. A Variable-Temperature X-ray Crystal Study
作者:Gastone Gilli、Valerio Bertolasi、Paola Gilli
DOI:10.1021/cg301546v
日期:2013.8.7
that cocrystallization with TCNQ induces two main effects: (i) in TCNQ itself, a significant change from quinoid to aromatic geometry, from which a CT of some 0.40 e can be estimated; (ii) in azonaphthols, a shift of the N–H···O ⇄ N···H–O equilibrium toward the pure N–H···O tautomer, accompanied by a decrease of π-delocalization inside the conjugated ···HN–N═C–C═O··· resonant fragment. These findings