The 2-Arsaethynolate Anion: Synthesis and Reactivity Towards Heteroallenes.
The synthesis and isolation of the 2-arsaethynolate anion, AsCO(-) , and its subsequent reactivity towards heteroallenes is reported. Reactions with ketenes and carbodiimides afford four-membered anionic heterocycles in formal [2+2] cycloaddition reactions. By contrast, reaction with an isocyanate yielded a 1,4,2-diazaarsolidine-3,5-dionide anion and the unprecedented cluster anions As10 (2-) and As12 (4-) . These preliminary reactivity studies hint at the enormous potential synthetic utility of this novel anion, which may be employed as an arsenide (As(-) ) source.
Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, OX1 3TA, Oxford, UK.
Alexander
A
Hinz
Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, OX1 3TA, Oxford, UK. jose.goicoechea@chem.ox.ac.uk.
Jose M
0000-0002-7311-1663
JM
Goicoechea
arsenic; cluster compounds; cycloadditions; reaction mechanisms; structure elucidation