Thermal decomposition and stability in a series of heterobimetallic carbonyl compounds of the type [Fe(CO)4(HgX)2] (X=Cl, Br, I)

José Roberto Zamian,Antonio Eduardo Mauro,Carolina Coimbra Nunes,Eduardo Tonon De Almeida

doi:10.1590/s0100-46702000000100008

Abstract

Heterobimetallic carbonyl compounds of the type [Fe(CO)4(HgX)2] (X= Cl, Br, I), which have metal-metal bonds, have been prepared in order to study their thermal stabilities as a function of the halogen coordinated to mercury atoms. The characterization of the above complexes was carried out by elemental analysis, IR and NMR spectroscopies. Their thermal behaviour has been investigated and the final product was identified by IR spectroscopy and by X-ray powder diffractogram.

Highlights

Reactions of transition - metal complexes with mercury salts have yielded a number of compounds which show metal-mercury bonds4,1013
In order to fill up this gap, and as a part of our on going studies of bimetallic compounds, we report our data related to thermal stability of the compounds [Fe(CO)4(HgX)2]; X = Cl (1), Br(2), I (3)
In this work the use of thermogravimetric analysis has as its main objectives to verify the influence of the HgX moiety, X = Cl(1), Br(2), I(3) on the initial decomposition temperature and on the thermal decomposition mechanisms

Summary

Introduction

Reactions of transition - metal complexes with mercury salts have yielded a number of compounds which show metal-mercury bonds4,1013. Among the first ones reported in the chemistry of metal- carbonyls are those compounds with Fe-Hg bonds like [Fe(CO)4(HgX)2], X = Cl, Br, I 7,8. In order to fill up this gap, and as a part of our on going studies of bimetallic compounds, we report our data related to thermal stability of the compounds [Fe(CO)4(HgX)2]; X = Cl (1), Br(2), I (3).

Results

Conclusion