Title

The Structure of a Potassium-Copper Complex with Six-Membered Macrocyclic Ethylsiloxanolate Ligands

Document Type

Article

Language

eng

Publication Date

4-1993

Publisher

Springer

Source Publication

Russian Chemical Bulletin

Source ISSN

1066-5285

Abstract

The structure of K2{[EtSiO2]6K2Cu4[O2SiEt]6} · 4n-BuOH, a novel mixed sandwich-like complex of K+ and Cu2+ with two 6-membered macrocyclic ethylsiloxanolate ligands, was established by means of X-ray study. The ligands have an all-cis configuration and a crown conformation. Four Cu2+and two K+ ions form a planar hexagon sandwiched between antiparallel coaxial macrocyclic ligands. The K+ ions occupy two opposite apices of the hexagon. The Cu2+ ions have square-planar coordination with four siloxanolate OM atoms, while the K+ ions, are coordinated with two O atoms of the solvating butanol molecules, in addition to four OM atoms. The electric neutrality of the whole complex is due to the two outer-sphere K+ counter-ions, each located over one of the two siloxanolate macrocycles, i.e., over the «decks» of the sandwich and coordinated with endocyclic siloxane OSi atoms, as in crown-ether complexes.

Comments

Russian Chemical Bulletin, Vol. 42, No. 4 (April 1993): 718-722. DOI.

Sergey Lindeman was affiliated with Russian Academy of Sciences at the time of publication.

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