Syntheses of K[Co(tren)(NH3)(SO4)](S4O6)·2(H2O) and of [cis-α-Co(trien)(NH3)Cl](S5O6) – Compounds Produced by Hydrolytic Cleavage of Sulfur–Sulfur Bonds of the Tetrathionate Anion

Abstract

K[Co(tren)(NH3)(SO4)](S4O6)·2(H2O) (1) and [cis‐α‐Co‐(trien)(NH3)Cl](S5O6) (2) have been prepared unexpectedly while attempting to obtain crystals suitable for X‐ray diffraction of [Co(tren)(NH3)Cl](S4O6) (3) and of [cis‐Co(trien)(NH3)Cl](S4O6) (4), respectively. 1 is derived from 3 by hydrolysis of the tetrathionate anion resulting in a sulfato moiety which displaces the chloro ligand from the coordination sphere of the metal center. 2 is derived from 4 by hydrolysis of the tetrathionate anion followed by reformation into pentathionate anion and H2S, as described in previous chromatographic work by Steudel. Compounds 1 and 2 have been characterized by elemental analyses and by single‐crystal X‐ray diffraction studies.

Reversible Coordinative Bonds in Molecular Recognition

“…Tren complexes of various metals have been known since 1959 . Among all reported complexes, Cu(II), Cu(I), Ni(II), Zn(II), Co(III), Rh(III), Fe(III), and Cr(III) complexes have received the most attention (Table ).…”