Structure of Ethylene Oxide Oligomer Complexes. II. A 1:1 Complex of Tetraethylene Glycol Diethyl Ether with Mercuric Chloride

Abstract

Abstract Structure of a 1:1 complex of tetraethylene glycol diethyl ether CH3CH2O(CH2CH2O)4CH2CH3 (TGE) with mercuric chloride has been investigated by means of X-ray diffraction. The complex has a cubic unit cell with a=−12.54 Å and four molecules of both TGE and HgCl2 are contained in the unit cell. The space group is Pa3-Th6. Four Hg atoms are located at the positions corresponding to the face centered arrangement. The TGE molecule is statistically arranged around the Hg atom located at the position having site symmetry \bar3. The following molecular conformation of TGE was suggested : CH3CH2\undersetT–O\undersetT–CH2\undersetG–CH2\undersetT–O2\undersetT–CH2\underset\barG–CH2\undersetT–O\undersetT–CH2\undersetG–CH2\undersetT–O\undersetT–CH2\underset\barG–CH2\undersetT–O\undersetG–CH2–CH3 where T, G, and \barG indicate trans, gauche, and minus gauche forms, respectively. The TGE molecule encloses the HgCl2 molecule around the Hg atom with close interatomic distances between the Hg and O atoms.