Metamagnetic behaviour in a new Cu(II)Re(IV) chain based on the hexachlororhenate(IV) anion.

A new chloro-bridged heterobimetallic Cu(II)Re(IV) chain of formula {Cu(pyim)(Him)2ReCl6}n·MeCN (1·MeCN) has been prepared and magnetostructurally characterised. Compound 1 is the first example of the [ReIVCl6]2− anion acting as a metalloligand towards a paramagnetic metal ion.