Crystal structure of the inverse crown ether tetra-kis-[μ2-bis-(tri-methyl-sil-yl)amido]-μ4-oxido-dicobalt(II)disodium, [Co2Na2{μ2-N(SiMe3)2}4](μ4-O).
The title compound, [Co2Na2{μ2-N(SiMe3)2}4](μ4-O), (I), represents a new entry in the class of inverse crown ethers. In the mol-ecule, each Co atom is formally in the oxidation state +II. The structure contains one half of a unique mol-ecule per asymmetric unit with the central μ4-oxido ligand residing on an inversion center, leading to a planar coordination to the Na and Co atoms. In the crystal, bulky tri-methyl-silyl substituents prevent additional inter-actions with cobalt. However, weak inter-molecular Na⋯H3C-Si inter-actions form an infinite chain along [010]. The structure is isotypic with its Mg, Mn and Zn analogues.
The University of Chicago, Department of Chemistry, 5735 S Ellis Ave., Chicago, IL 60637, USA.
Christopher B
CB
Hansen
The University of Chicago, Department of Chemistry, 5735 S Ellis Ave., Chicago, IL 60637, USA.
Alexander S
AS
Filatov
The University of Chicago, Department of Chemistry, 5735 S Ellis Ave., Chicago, IL 60637, USA.
Gregory L
GL
Hillhouse
cobalt; crystal structure; inverse crown ether; μ4-oxido ligand