Oxalate-bridged heterometallic chains with monocationic dabco derivatives

Abstract

A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. (4)) were synthesized. All compounds have one-dimensional zig-zag chain structures with R-dabco cations located between chains. Cryomagnetic studies reveal that 1 and 3 showed intrachain ferromagnetic interactions between Co(II) and Cr(III) ions and metamagnetic behaviour due to interchain antiferromagnetic interactions. Permittivity measurements on compound 4 indicate specific paraelectronic relaxation behaviour originating from the rotational motion of the dabco alkyl substituent.

Electrically responsive structural transformations triggered by vapour and temperature in a series of pleochroic bis(oxalato)chromium(iii) complex salts

“…Dielectric constant value for dehydrated compound 1 changes only slightly with temperature variations, from 15.3 to 16.0, with a distinct peak around 250 K indicative of the thermally activated molecular motion of the (H 2 -DABCO) 2+ cation. 44 Compound 5 H 2 O also has a peak in the dielectric loss around 250 K (Fig. S14c, ESI †) suggesting dissipation of the electric energy due to the dynamics of polar [H-(COOH)(OH)ABCO] + cations (dielectric relaxation).…”