The modification of bis(pyrazol-1-yl)methanes by chalcogen (S and Se) and their related reactions with organotin chloride and M(CO)5THF (MÂ =Â Mo and W)

The modification of bis(pyrazol-1-yl)methanes by sulfur or selenium on the methine carbon atom has been successfully carried out by the reaction of the bis(pyrazol-1-yl)methide anions with elemental sulfur or selenium, and their related reactions with organotin chloride and M(CO)5THF (M = Mo and W) have also been studied.