Ethers as ligands. Part VII. Monomeric and chloride-bridged dimeric metal(II) triglyme compounds

Abstract A number of new coordination compounds is reported with triethyleneglycoldimethylether (tgm) as the ligand [1]. The compounds have the general formula [M 2 (tgm) 2 Cl 2 ] (SbCl 6 ) 2 where M is Mn(II), Co(II), Ni(II), Cu(II), and Zn(II). In these dimeric complexes the hexa-coordinated metal ions are bridged by two chloride ions. The chelating, tetradentate triglyme molecules are in the T G T G G TTGT and TGTGGTT G T conformation respectively. Other compounds isolated are [M(tgm) 2 ] (SbCl 6 ) 2 where M is Ca(II) and Sr(II), and [M(tgm) 2 ] (SbCl 6 ) 2 (H 2 O) 2 where M is Mg(II) and Mn(II). In these monomeric compounds the Ca(II) , Sr(II), and Mn(II) ions seem to be octacoordinated by the oxygen atoms of the ether molecules which are in the TGTT G TTGT conformation.