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RESEARCH PRODUCT

Synthesis, crystal structure, electrochemical and magnetic properties of (NBu4)[ReCl5(L)] with L=pyrimidine and pyridazine

Giovanni De MunnoCarlos KremerRicardo GonzálezLivia ArizagaMaría Fernanda CerdáJuan FausDonatella ArmentanoFrancesc LloretRaúl Chiozzone

subject

DiazineDenticityCoordination sphereChemistryInorganic chemistryStackingchemistry.chemical_elementCrystal structureRheniumInorganic ChemistryPyridazineCrystallographysymbols.namesakechemistry.chemical_compoundMaterials ChemistrysymbolsPhysical and Theoretical Chemistryvan der Waals force

description

Abstract Two novel rhenium(IV) compounds, namely (NBu4)[ReCl5(pym)] (1) and (NBu4)[ReCl5(pyd)] (2) (pym = pyrimidine, pyd = pyridazine and NBu4 = n-tetrabutylammonium cation), have been obtained by reaction of [ReCl6]2− and the diazine in dmf, and their crystal structures determined by single-crystal X-ray diffraction. The structures of 1 and 2 consist of [ReCl5(pym)]− or [ReCl5(pyd)]− anions and NBu 4 + cations held together by electrostatic forces and van der Waals interactions. Stacking interactions are present only in 1. The coordination sphere of the ReIV ion is defined by five chloride anions and one nitrogen atom of a monodentate diazine, resulting in a distorted octahedral environment. Voltammetric profiles in CH3CN show a one-electron reduction step at ca. −0.5 V vs. NHE for both complexes. Magnetic measurements reveal weak antiferromagnetic interactions among the metal centers in the crystal lattices of 1 and 2, superimposed to the well-known zero-field splitting of Re(IV) compounds.

yearjournalcountryeditionlanguage
2008-02-01Polyhedron
https://doi.org/10.1016/j.poly.2007.10.009