The Molecular and Crystal Structure of Tris(1,2-ethanediol)copper(II) Sulphate; [Cu(C2H6O2)3]SO4.

Influence of Common Anions on the Coordination of Metal Cations in Polyalcohols

“…Compared to the used starting materials [ M (H 2 O) 6 ](NO 3 ) 2 ( M = Co, Ni, Zn), two aqua ligands are replaced by one EG ligand in the products. Similar to the structurally characterized compounds [ M (EG) 3 ]SO 4 ( M = Co, Ni, Cu, Zn, ), three neutral EG molecules chelate the metal cation. The average M –O distances in the M O 6 octahedra are 208.5 pm (Co), 204.8 pm (Ni), and 208.4 pm (Zn).…”

“…With salts of the weakly coordinating triflate anion, the tris ‐chelated octahedral [Ni(EG) 3 ] 2+ complex, and the Jahn‐Teller distorted [Cu(EG) 3 ] 2+ complex were found to be the dominating solution species. In the solid state, [ M (EG) 3 ] 2+ complexes were obtained from crystallization experiments starting from 3d metal sulfates . Tris ‐chelated [ M (EG) 3 ] 2+ complexes were also found for some of the 3d metal nitrate compounds investigated here ( M = Co, Ni, Zn; compounds 3 – 6 ).…”

“…uncharged) EG ligands were described more than a century ago by Grün , . In the 1970s, Antti published the crystal structures of some complexes obtained from 3d‐metal chlorides or sulfates and EG. Chloride (and other halide) ions are strong ligands, which typically reside in the first coordination sphere of metal cations.…”

Thermal stability and crystal structure of bis(1,2 ethanediol)zinc sulfate

“…As in the Case of the bis(ethylene glycol) metal(II) halides (Antti, 1973(Antti, , 1975 and tris(ethylene glycol) metal(II) sulfates (Antti, 1972(Antti, , 1976a the ethylene glycol molecules in the ZnG12SO4 complex form chelates with the zinc ion. There are differences between the bis complexes of metal halides and sulfates: in metal chloride complexes (Antti, 1973(Antti, , 1975) the ethylene glycol molecules are arranged in an approximately square plane of the octahedron around the metal ion, while in both the tris (Antti, 1976b) and the bis complexes of metal sulfates one glycol molecule is placed in the equatorial positions and the others are bonded in the equatorial and apical positions of the octahedron.…”

“…The crystal structures of tris(1,2-ethanediol) metal(II) sulfates have been studied (M(II)=Cu, Co, Ni, Zn) (Antti et al, 1972, Antti, 1976a. In spite of the preparation and investigation of bis(1,2-ethanediol) metal(II) halides and sulfates (Knetsch and Groeneveld, 1973a,b) the crystal structure have been reported only for the bis complex of metal(II) halides (Antti, 1973(Antti, , 1975.…”