A General Synthesis of Phosphorus‐ and Arsenic‐Containing Analogues of the Thio‐ and Seleno‐cyanate Anions

A general synthetic protocol for the synthesis of phosphorus‐ and arsenic‐containing analogues of the thio‐ and seleno‐cyanate anions is reported. This procedure allows for the isolation of three unprecedented species: the phosphaethynselenolate, PCSe− (1), the arsaethynthiolate, AsCS− (2), and the arsaethynselenolate, AsCSe− (3), anions. The structures, electronic properties, and spectroscopic signatures of these species are reported.