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The title compound, bis[(1,10-diaza-4,7,13,16,21,24-hexaoxabicyclo[8.8.8]hexacosane)sodium(+)] decacarbonyldichromate(Cr-Cr)(2-), [Na(C18H36N2O6)]2[Cr2(CO)10], has been prepared by the reduction of [Cr(CO)6] with Na2Tl in dimethylformamide followed by the addition of the macrobicyclic ligand, 2,2,2-crypt in ethylenediamine (en) solvent. The geometric parameters observed for the anion in the title salf differ significantly from those reported previously for the DME solvated (DME = 1,2-dimethoxyethane) K+ and [PPN]+ {[PPN]+ = bis[bis(triphenylphospine)iminium]} salts, reflecting the more weakly coordinating nature of the [2,2,2-crypt-Na]+ cation.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablock cr2co10

fcf

Structure factor file (CIF format)
Supplementary material

CCDC reference: 128364

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