Paramagnetic alkali-aromatic ion-pair structures. The crystal structure of bis[1,2-bis(2-methoxyethoxy)ethane]sodium biphenylide

Abstract

[Na(CsH 1804)2 ] C 12Hi0, (C 16H36NaOs)+C 12Hi0, M r = 533.7, monoclinic, P21, a = 11.721(2), b = 13.425 (2), c = 9.555 (2) A, fl = 103.08 (4) ° 12(Mo Ka) = 0.71069/~1, V= 1464.5/~3, Dx (150 K) = 1.21 Mg m -3, Z = 2. The structure was solved by MULTAN and refined to R(F o) = 0.032 and Rw(Fo) = 0.041 for 2059 reflections measured with graphite-monochromated Mo K~t radiation. The complex belongs to the category of solvent-separated ion-pair structures. The biphenyl anion is significantly non-planar. The local symmetry of the sodium-triglyme part of the structure is close to twofold and nearly 222.