Crystal structure of di-μ-trihydro(pentafluorophenyl)borato-tetrakis(tetrahydrofuran)disodium

Abstract

The title compound, [Na(μ-C6F5BH3)(C4H8O)2]2, represents a dimeric structure of sodium and organoborohydride, located about a centre of inversion. The Na...B distances of 2.7845 (19) and 2.7494 (18) Å were apparently longer than the Li...B distances (2.403–2.537 Å) of the lithium organotrihydroborates in the previous reports. Moreover, an interaction between the sodium atom and one fluorine atom on the 2-position of the benzene ring is observed [Na—F = 2.6373 (12) Å]. In the crystal, the dimeric molecules are stacked along the b-axis via a π–π interaction between the benzene rings.