The Lewis Base Stabilized Parent Arsanylborane H₂AsBH₂⋅NMe₃

Abstract

Exclusively hydrogen-substituted arsanylboranes: The synthesis of the unprecedented Lewis base stabilized monomeric parent compound of the arsanylborane H2AsBH2⋅NMe3 was achieved in a one-pot reaction in high yield and purity. The analogous phosphanylborane was synthesized in a similar manner. A series of different reactions was performed on H2AsBH2⋅NMe3 to show its broad reactivity pattern.

Cationic Chains of Phosphanyl‐ and Arsanylboranes

“…[24] [VCl 3 (thf) 3 ] acts as halide abstractor, leading to the formation of the boranylium cation BH 2 ·NMe 3 + , which reacts with H 2 PBH 2 ·NMe 3 (Figure 4 and Figure 5). The corresponding reaction of IBH 2 ·SMe 2 with H 2 PBH 2 ·NMe 3 leads to the formation of [Me 3 N·BH 2 À PH 2 À BH 2 À PH 2 À BH 2 ·NMe 3 ] + [I] À (2[I], Scheme 1 c) in high yields.…”

Isolation and Characterization of Lewis Base Stabilized Monomeric Parent Stibanylboranes

“…In the EI-MS spectra, the molecular ion peak is detected for 1 and 2.T he IR spectra of . [24] Compound 1 shows as imilar E-B-N bond angle to that of (Me 3 Si) 2 EÀBH 2 ·NMe 3 (E = P, As) [13] and also adopts as ynperiplanar arrangement (for SiMe 3 and Hs ubstituents, view along SbÀBa xis), whereas 2 deviates slightly from the synperiplanar arrangement.…”

Ein Weg zu gemischten Pnictogenylboranen

“…[7] Eine ähnliche h 2 :h 2 -Koordination von [R 2 N=BH 2 ]w urde an einem Ir-Komplex beobachtet. Mithilfe dieser Strategie gelang es unserer Gruppe,d ie Stammverbindungen der Phosphanylborane, [11] Arsanylborane [12] und Stibanylborane [13] zu synthetisieren. In letzerem Fall wird das freie p-Orbital am Boratom durch eine Lewis-Base (LB) blockiert, während das freie Elektronenpaar des Pnictogenatoms an eine Lewis-Säure (LS) koordiniert.…”

“…[10] Der Rivard-Gruppe gelangen sowohl die Synthese von H 3 B-H 2 NBH 2 -DMAP (DMAP = Dimethylaminopyridin) als auch dessen Umwandlung in Borazin. [11,12] Darüber hinaus zeigten Rechnungen, dass eine LS wie W(CO) 5 ausreicht, um die Polymerisierung von H 2 PBH 2 zu verhindern. Mithilfe dieser Strategie gelang es unserer Gruppe,d ie Stammverbindungen der Phosphanylborane, [11] Arsanylborane [12] und Stibanylborane [13] zu synthetisieren.…”