Synthese und Einkristallröntgenstrukturanalyse von Bromdi(isopropenyl)bismutan

2,6‐Diisopropylphenyl‐Substituted Bismuth Compounds: Synthesis, Structure, and Reactivity

“…Moreover, diaryl bismuth halides of the heavier halogens can be prepared via halogen exchange reactions with alkaline or earth alkaline metal halides and diaryl bismuth halides of lighter halogens [1,11,12] . It is common for bismuth halides to show secondary bonding interactions between bismuth and halogen atoms of neighboring molecules in the solid state [8–10,12–14] . The tendency for intermolecular interactions lowers when sterically more demanding substituents are employed [2,4] .…”

“…Consequently, steric demand greatly influences the solid state structure of substituted halido bismuthanes. Most dialkyl and diaryl halido bismuthanes with low steric bulk around the bismuth center form one dimensional polymeric chains with alternating bismuth and halide atoms [9,10,12–14] . Sterically shielded dialkyl and diaryl halido bismuthanes form monomers, [2,4] dimers [8] or oligomers [12] .…”

“…[1,11,12] It is common for bismuth halides to show secondary bonding interactions between bismuth and halogen atoms of neighboring molecules in the solid state. [8][9][10][12][13][14] The tendency for intermolecular interactions lowers when sterically more demanding substituents are employed. [2,4] Consequently, steric demand greatly influences the solid state structure of substituted halido bismuthanes.…”

“…Most dialkyl and diaryl halido bismuthanes with low steric bulk around the bismuth center form one dimensional polymeric chains with alternating bismuth and halide atoms. [9,10,[12][13][14] Sterically shielded dialkyl and diaryl halido bismuthanes form monomers, [2,4] dimers [8] or oligomers. [12] The monomeric, 2,6-dimesitylphenyl (Ter) substituted, chloro bismuthane (Ter 2 BiCl) and the polymeric, mesityl (Mes) substituted, bromo bismuthane (Mes 2 BiBr) are shown in Figure 1 as examples.…”

Isolation and X-ray Structure of a Dialkylbismuth(III) Iodo “Nanosquare”: Breaking the Polymeric Mold of R2BiX

“…The advent of single-crystal X-ray crystallography revealed that the majority of such species form polymeric halide-bridged aggregates in the solid state. In the case of the more common dihaloorganobismuth­(III) species, these aggregates can form extended three-dimensional structures, − while their monohalogenated congeners feature R 2 Bi units generally stabilized by bulky alkyl or pendant aryl groups linked by η 2 -bridging halides in a staircase motif. −, …”