Mechanism of dinitrogen reduction in protic media is discussed in the light of results obtained for specially prepared binuclear complexes M"M with bridging dinitrogen capable to be protonated and reduced. The conclusion is made that such complexes with d2 or d3 electronic configuration of M together with additional electron donor are likely intermediates in catalytic dinitrogen reduction by co...

The Michael reaction, which involves 1,4-addition of a nucleophile (preferably a C-nucleophile) to an a,b-unsaturated compound, offers a simple yet effective way of making C C bonds, which makes it one of the most widely used reactions in both industry and academia. The reaction, as first reported by Arthur Michael in 1887, involves primarily the attack of a Cnucleophile, generated from compoun...

For the synthesis of Mequinol (4-methoxy phenol), two acidic ionic liquids based on imidazolium cation (BMSIL and IMSIL) synthesized and characterized by FT-IR, 1H NMR, and CHNS analyses. Tan, the Baeyer–Villiger oxidation of para-anisaldehyde was studied with these ionic liquids, as the catalysts. The results showed that the BMSIL with more Brønsted acidic functions had higher c...

The present study reports the first structural characterization of protonated cyameluric acid ([CA + H]+) in gas phase, which paves way for prospective bottom-up research on condensed-phase chemistry CA form. A number [CA H]+ keto-enol isomers can a priori be produced as result protonation at available N and O positions precursor neutral tautomers, yet ab initio computations predict different r...

A series of triazolium and imidazolium based protic ionic liquids were synthesized using a solvent-free method designed to address several limitations encountered with other commonly used methods. Using this method, pure (98–99% m/m) dry (128–553 ppm water) (in laboratory scale) without the need for purification methods that require heating liquid, hence avoiding common issue thermal decomposit...

An endocyclic pathway is proposed as a reaction mechanism for the anomerization from the β (1,2-trans) to the α (1,2-cis) configuration observed in glycosides carrying 2,3-trans cyclic protecting groups. This reaction occurs in the presence of a weak Lewis or Brønsted acid, while endocyclic cleavage (endocleavage) in typical glycosides was observed only when mediated by protic media or strong L...