What question did this study set out to answer?

The aim is to synthesize and characterize new bimetallic complexes involving Mn(II), Fe(II), and Cd(III) with nicotinamide.

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January 24, 2026

Framework tetrarhodanomercurate complexes of Mn(II), Fe(II), Cd(II) with nicotinamide: synthesis and crystal structure

Key Points

The aim is to synthesize and characterize new bimetallic complexes involving Mn(II), Fe(II), and Cd(III) with nicotinamide.
Synthesis from aqueous solutions
Characterization by CHNS/O analysis
IR spectroscopy
Inductively coupled plasma optical emission spectrometry (ICP-OES)
X-ray diffraction analysis (XRD)
Three new complexes were synthesized and are isostructural
X-ray diffraction shows monoclinic syngony in space group C2/c
M atoms are coordinated by two nitrogen atoms from nicotinamide and four nitrogen atoms from SCN groups

Abstract

New bimetallic complexes of the composition MHg(CHNO)(SCN) have been synthesized, where M = Mn (I), Fe (II), Cd (III); CHNO is nicotinamide (NA). The compounds were obtained from aqueous solutions and studied by CHNS/O analysis, IR spectroscopy, inductively coupled plasma optical emission spectrometry (ICP-OES) and X-ray diffraction analysis (XRD). Compounds I–III are isostructural and crystallize in the monoclinic syngony (space group C2/c). The coordination environment of the M atom is formed by two donor nitrogen atoms of two monodentately coordinated NA and four nitrogen atoms of the SCN groups, which form bridges between the M and Hg ions, connecting them into a three-dimensional framework. Hg ions have a tetrahedral coordination environment consisting of four S atoms of four SCN groups.

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