Nanoparticles of two new coordination supramolecular compounds, [Hg₂(L)₂(Br)₄]_n (1) and [Hg(L′)(SCN)₂] (2), have been synthesized by use of a sonochemical process.

The single crystal X-ray data of compounds 1 and 2 imply that the Hg(II) ions are four and five coordinated, respectively.

The role of temperature, reaction time and ultrasound irradiation power on the size and morphology of nano-structures 1 and 2, have been investigated.

Increase of temperature, sonication power and decrease in reaction time leads to a decrease of particle size.