title: Bis{bis-[1-meth-oxy-2-(2-meth-oxy-eth-oxy)ethane-κ(3) O,O',O'']sodium} 1,1,2,2-tetra-phenyl-ethane-1,2-diide.
abstract: Crystals of the title salt, [Na(C6H14O3)2]2(C26H20), were grown from a tetra-hydro-furan/diglyme/Et2O solvent mixture [diglyme is 1-meth-oxy-2-(2-meth-oxy-eth-oxy)ethane]. The cations and dianion are separated in the crystal structure, unlike in the other three structurally characterized dialkali metal tetra-phenyl-ethyl-ene salts. The asymmetric unit contains one [Na(diglyme)2](+) cation and one half of the [Ph2CCPh2](2-) dianion. The latter lies on a twofold rotation axis. C-C bond-length redistribution displays that excessive electron density of the dianion is predominantly located at the C atoms of a former double bond and at all eight ortho positions. The studied crystal was a twin, with the ratio of two major components being 0.2143 (9):0.7857 (9). The twin operation is a twofold rotation around the a axis.
authors.affiliation: A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, 119991 Moscow, Russian Federation.
authors.forename: Mikhail E
authors.initials: ME
authors.lastname: Minyaev
authors.affiliation: University of Minnesota, 207 Pleasant St. SE, Minneapolis, MN 55455, USA.
authors.forename: John E
authors.initials: JE
authors.lastname: Ellis