Syntheses and structural characterization of heterometallic bis(pyrazolyl)methane complexes of rhenium and platinum

Abstract

The new heterometallic complex {μ-1,3,5-[CH(pz) 2] 3C 6H 3}[Re(CO) 3Br][Pt( p-tolyl) 2] 2 has been prepared by reaction of 1 equiv. of the dimer [Pt( p-tolyl) 2(μ-SEt 2)] 2 with the monometallic rhenium precursor {1,3,5-[CH(pz) 2] 3C 6H 3}Re(CO) 3Br, where 1,3,5-[CH(pz) 2] 3C 6H 3 is the tritopic, arene-linked bis(pyrazolyl)methane ligand 1,3,5-tris[bis(1-pyrazolyl)methyl]benzene. Similarly, the heterometallic complex {μ-1,3,5-[CH(pz) 2] 3C 6H 3}[Re(CO) 3Br] 2[Pt( p-tolyl) 2] has been made by the reaction of the dirhenium compound {μ-1,3,5-[CH(pz) 2] 3C 6H 3}[Re(CO) 3Br] 2 and one-half of an equivalent of [Pt( p-tolyl) 2(μ-SEt 2)] 2. X-ray crystallographic studies of the new compounds reveal significant noncovalent interactions in their molecular and supramolecular structures.