User:Benjah-bmm27/Au-S

Gold-sulfur chemistry.


 * Gold is the most electronegative metal of all
 * Gold is 2.4 on the Pauling scale
 * Compare that with 2.4 for selenium and 2.5 for sulfur and iodine


 * Gold is the only metal that will not react directly with sulfur!


 * Hydrogen sulfide reacts with aqueous gold(I) to form a precipitate of gold(I) sulfide, Au2S.
 * H2S reacts with cold solutions of AuCl3 in dry Et2O to form gold(III) sulfide, Au2S3.
 * Au2S3 + H2O → Au(I) or Au(0) (fast reaction)


 * Au(I) is a soft Lewis acid, preferring P, As and S donor atoms in its complexes