Novel chelates reveal how frustrated Lewis pairs stabilize arsenic compounds with various oxidation states, suggesting new chemical pathways.
The first examples of frustrated Lewis pair (FLP)‐stabilized compounds with formal oxidation states of arsenic ranging from −1 to +1 have been synthesized. These chelates include the metalated arsinidenyl As(─I) anion in FLP{As─K} ( 1 ), which provides access to the parent FLP‐stabilized arsinidene, As(+I)─H, in FLP{As─H} ( 3 ), and a diatomic arsenic(0) allotrope within FLP{As─As}FLP ( 5 ). Irradiation of the As 2 complex 5 represents an unprecedented method for the generation of nascent diarsenic, As 2 nasc , which shows triple‐bond like reactivity with a diene and selective As 2 unit insertion into metal‐metal bonds under mild conditions.
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Zapf et al. (2025) studied this question.
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