The chemistry of borinium and borenium ions

Synthesis and structure of the coordinatively unsaturated boron subphthalocyanine cation, [B(SubPc)]+

“…Competition between coordinating anions and neutral N-atom donors has been studied in dialkylboreniumlike species, R 2 BL(SO 3 CF 3 ) [12]. The long-term goal of this work is to develop new Lewis acids based on borenium ions [13,14]. Boron subpthalocyanines are of current interest in the development of photoand electro-active assemblies [15], and axial ligand changes may become an important part of the finetuning of their electronic properties.…”

Lewis Superacidic Ionic Liquids with Tricoordinate Borenium Cations

“…The most important routes to generate borenium cations are hydride or halide abstraction from tetracoordinate boron adducts, [BX3L], using an excess of abstracting agent (Figure 1). [4,5,7,10] Many borenium complexes have been reported as 'oily materials'. [4] Despite the increasing number of known crystal structures, [5,8,9] they are generally difficult to crystallize, and are typically studied in solution, using 11 B NMR spectroscopy.…”

Mono- and Polynuclear Boron Dications

“…65 The crystal structure of [34][HB(C 6 F 5 ) 3 ] 2 shows that the central B 4 unit is on the same plane and arranged in a distorted rhombus geometry with a BB distance of 1.703(4) ¡ along the shorter diagonal of the rhombus. With the remaining BB distances of 1.896(3) and 1.943(3) ¡, the extremely short BB bond length of the central B 2 unit and an acute BBB angle of 65.31 (15)°s uggest the presence of two BBB 3c2e bonds in the central B 4 core. The 3c2e bonding description suggested by the crystal structure is further supported by the topology analysis of the electron density distribution of [34] 2+…”