文摘
Oxidation of carbene-stabilized diarsenic, L:As鈥揂s:L [L: = :C{N(2,6-iPr2C6H3)CH}2] (1), with gallium chloride in a 1:4 ratio in toluene affords the dicationic diarsene complex [L:As鈺怉s:L]2+([GaCl4]鈭?/sup>)2 (22+[GaCl4]2), while oxidation of 1 with GaCl3 in a 1:2 ratio in Et2O yields the monocationic diarsenic radical complex [L:AsAs:L]鈥?[GaCl4]鈭?/sup> (2鈥?[GaCl4]). Strikingly, complex 2鈥? is the first arsenic radical to be structurally characterized in the solid state. The nature of the bonding in these complexes was probed computationally and spectroscopically.