Isolation of an Arsenic Diradicaloid with a Cyclic C₂ As₂ -Core.

ABSTRACT: Herein, we report on the synthesis, characterization, and reactivity studies of the first cyclic C₂ As₂ -diradicaloid {(IPr)CAs}₂ (6) (IPr = C{N(Dipp)CH}₂ ; Dipp = 2,6-iPr₂ C₆ H₃ ). Treatment of (IPr)CH₂ (1) with AsCl₃ affords the Lewis adduct {(IPr)CH₂ }AsCl₃ (2). Compound 2 undergoes stepwise dehydrochlorination to yield {(IPr)CH}AsCl₂ (3) and {(IPr)CAsCl}₂ (5 a) or [{(IPr)CAs}₂ Cl]OTf (5 b). Reduction of 5 a (or 5 b) with magnesium turnings gives 6 as a red crystalline solid in 90% yield. Compound 6 featuring a planar C₂ As₂ ring is diamagnetic and exhibits well resolved NMR signals. DFT calculations reveal a sing

SUBMITTER: Steffenfauseweh H 

PROVIDER: S-EPMC9545666 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature