Synthesis and low-frequency vibrational spectra of N-(2-ammoniumethyl)- piperazinium halide-mercurates(II). Crystal structure of N-(⇐moniumethyl)- piperazinium monochloride tetrachloromercurate(II)

Abstract

Compounds of the type [N(2amet)pipzH 3)-[HgX 4]X (N(2amet)pipzH 3 = N-(2-ammoniumethyl)-piperazinium trication; X = Cl, Br) have been prepared and characterized by means of Raman and far-IR spectroscopy. The crystal determination of [N(2amet)pipzH 3)-[HgCl 4] Cl shows that it is composed of discrete monomeric [HgCl 4] 2− units, chloride and [N(2amet)pipzH 3] 3+ ions. Co-ordination around the mercury atom is distorted tetrahedron with two shorter and two longer HgCl distances (av. 2440(9) and av. 2.556(9) Å, respectively).