CHLORINATED ORGANIC DERIVATIVES CONTAINING Mo-Hg AND W-Hg BONDS: IMPORTANCE OF THE STERIC EFFECTS IN THEIR STABILIZATION

Article abstract of DOI:10.1016/0022-328X(84)80527-6

A series of Mo-Hg and W-Hg bonded complexes , (R = 2,4,6-C6H2Cl3, 2,3,5,6-C6HCl4 and C6Cl5) have been prepared from ClHgR and the salts Na.When R contains only one ortho chlorine atom (R = 2,5-C6H3Cl2, 2,3,4-C6H2Cl3 and 2,3,4,5-C6HCl4) a symmetrisatiom process occurs to give the corresponding HgR2 and Hg2.These results indicate that steric effects are very important in the formation of compounds containing molybdenum- or tungsten-mercury bonds.Complexes of the type <(C6Cl5)Hg-M(CO)2PPh3)Cp> (M = Mo and W) are obtained form <(C6Cl5)Hg-M(CO)3Cp> and PPh3 in boiling ethanol.