Arsaalkyne

In chemistry, an arsaalkyne is chemical compound with a triple bond between carbon and arsenic.

The parent HCAs has been characterized spectroscopically, otherwise the only arsaalkynes have bulky organic substituents.

[1] Arsaalkynes are produced by dehydrohalogenation or related base-induced elimination reactions.

The case of HCAs is illustrative: Owing to the principles of the double bond rule, arsaalkynes tend to oligomerize more readily than the phosphorus analogues.

Thus attempts to prepare AsCCMe3 produce the tetramer, which has a cubane structure.