Issue 48, 2018

Isolation of reactive Ln(ii) complexes with C5H4Me ligands (CpMe) using inverse sandwich countercations: synthesis and structure of [(18-crown-6)K(μ-CpMe)K(18-crown-6)][CpMe3LnII] (Ln = Tb, Ho)

Abstract

Although attempts to make the Y(II) complex, (CpMe3Y)1− (CpMe = C5H4Me), by reduction of CpMe3Y with potassium were unsuccessful and the products of potassium reduction of CpMe3Ln for Ln = La and Pr led to ring-opening reduction of THF, we report that crystallographically-characterizable Ln(II) complexes of Tb and Ho can be isolated by reducing CpMe3Ln(THF) with KC8 in THF in the presence of 18-crown-6 (18-c-6). X-ray crystallography revealed that these complexes are isolated with a methylcyclopentadienide inverse sandwich countercation: [(18-c-6)K(μ-CpMe)K(18-c-6)][CpMe3Ln] (Ln = Tb, Ho). Although reduction of CpMe3Ln with potassium in the presence of the 2.2.2-cryptand (crypt) chelate has not generally provided fully-characterizable, crystalline products, in the case of Dy, crystals of [K(crypt)][CpMe3Dy] could be isolated.

Graphical abstract: Isolation of reactive Ln(ii) complexes with C5H4Me ligands (CpMe) using inverse sandwich countercations: synthesis and structure of [(18-crown-6)K(μ-CpMe)K(18-crown-6)][CpMe3LnII] (Ln = Tb, Ho)

Supplementary files

Article information

Article type
Paper
Submitted
27 сеп 2018
Accepted
13 ное 2018
First published
14 ное 2018

Dalton Trans., 2018,47, 17285-17290

Author version available

Isolation of reactive Ln(II) complexes with C5H4Me ligands (CpMe) using inverse sandwich countercations: synthesis and structure of [(18-crown-6)K(μ-CpMe)K(18-crown-6)][CpMe3LnII] (Ln = Tb, Ho)

D. N. Huh, J. W. Ziller and W. J. Evans, Dalton Trans., 2018, 47, 17285 DOI: 10.1039/C8DT03890B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements