The history of silyl cations has all the makings of a drama but with a happy ending. Being
considered reactive intermediates impossible to isolate in the condensed phase for …

Lewis acids play a major role in all areas of chemistry. For a long time, toxic, corrosive and
oxidizing SbF5 was considered as the strongest Lewis acid known. Lately, species …

Multicomponent reactions (MCRs) receive increasing attention because they address both
diversity and complexity in organic synthesis. Thus, in principle diverse sets of relatively …

Asymmetric multicomponent reactions involve the preparation of chiral compounds by the
reaction of three or more reagents added simultaneously. This kind of addition and reaction …

Synthetic chemists are constantly challenged to consider more environmentally benign
methods for generation of the desired target molecules. 1 Recently, there has been an …

Silylium ions, or, to be more precise, donor-stabilized silylium-ion-like species, were once
only the domain of computational and structural chemists. This was mainly due to the …

Small-molecule dual hydrogen-bond (H-bond) donors such as ureas, thioureas,
squaramides, and guanidinium ions enjoy widespread use as effective catalysts for …

Boron cations are elusive and highly electrophilic species that play a key role in the
chemistry of boron. Despite early interest in the chemistry of boron cations, until recently they …

Computed enthalpies of formation for various Lewis acid complexes with representative
unsaturated compounds (aldehydes, imines, alkynes, and alkenes) provide a means to …

The controversy over “how free the trivalent silicon cation is” placed the emphasis on their
spectroscopic and crystallographic characterisation. Those investigations contributed …