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Abstract
The reaction between dimercury(I) salts and Lewis bases in polar solvents normally destroys the metal-metal bond of the +Hg-Hg+ dimercury(I) ion. However, many stable dimercury(I) compounds with the bonding system E-Hg-Hg-E (E = N,P,As,Sb,O,S,Se,Sn) have been described since 1958. The successful preparation of these dimercury(I) addition compounds is mainly due to the use of nonpolar solvents, the use of weak Lewis bases, and to the use of NH acidic nitrogen compounds. It is predicted that many more dimercury(I) compounds of this type can be formed.
