News from an Old Ligand: The Triple‐Decker Ion Triple, Tris([18]Crown‐6)‐disodium Bis(tetraphenycyclopentadienide) | Zendy

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News from an Old Ligand: The Triple‐Decker Ion Triple, Tris([18]Crown‐6)‐disodium Bis(tetraphenycyclopentadienide)

Author(s) -

Bock Hans,

Hauck Tim,

Näther Christian,

Havlas Zdenek

Publication year - 1997

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.199706381

Subject(s) - dication , ion , ligand (biochemistry) , chemistry , ring (chemistry) , crystallography , triple bond , crown (dentistry) , tris , sodium , stereochemistry , materials science , polymer chemistry , double bond , organic chemistry , receptor , biochemistry , composite material

Three [18]crown‐6 ligands and two sodium ions surprisingly form a triple‐decker sandwich dication, pictured schematically on the right. Due to sixfold O‐coordination of each sodium ion to the outer crown ethers, but only two Na + ċ O contacts each to the central ligand, the outer macrocyclic rings are distorted to a hemispherical conformation, whereas the central ring adopts a rectangular shape.

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