Abstract
Reaction of copper(II) chloride dihydrate in methanol with deprotonated 3,5-diisopropylpyrazole-1-methanol (dippmOH) led to the tetranuclear copper(II) complex [(dippmO)CuCl]4 (1). The crystal structure of 1 indicates that two copper(II) ions connect via the oxygen atoms of dippmO− ligands each other in which two dimeric units are formed. Furthermore, one of the coordinated oxygen atoms in a dimer is bonded to an adjacent copper(II) ion positioned other dimer, which gives rise to a stepped tetranuclear structure. 1 shows strong antiferromagnetic interactions through the oxo groups within the dimeric units (J1=−239cm−1) and weak antiferromagnetic couplings between the dimers (J2=−15cm−1).
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