Heterobimetallic {PtMn} and {PtFe} Lantern Complexes with Exceptionally Long Metallophilic Contacts

Publication date: Available online 30 April 2019Source: Inorganica Chimica ActaAuthor(s): Stephanie A. Beach, Linda A. Zuckerman, Romeo I. Portillo, Matthew P. Shores, Arnold L. Rheingold, Linda H. DoerrerAbstractA new series of heterobimetallic lantern complexes, [PtM(SAc)4(pySMe)] (M = Mn (1), Fe (2), Co (3), Ni (4), Zn (5)), as well as additions to the previously reported series, [PtM(SAc)4(pyNH2)] (M = Mn (6), Fe (7)), have been synthesized and thoroughly characterized. Notably, compounds 1 and 6 are the first crystallographically characterized, neutral Pt-Mn containing lantern complexes. Compounds 2 and 7 are the first examples of Pt-Fe containing lantern complexes with a pyridine based axial ligand. These newly synthesized complexes have been characterized by single-crystal X-ray diffraction and UV-vis (1-7), 1H and 13C-NMR spectroscopies (5), and solution magnetic susceptibility (1-4 and 6-7) and analyzed in comparison to our previously reported lantern families. Compounds 2-4 are isomorphous and contain two crystallographically independent dimers with the same staggered conformations. One dimer has a typical Pt…Pt metallophilic interaction ranging from 3.2198(6)-3.2913(6) Å while the other has a much longer contact ranging from 3.3212(6)-3.4533(6) Å. These latter contacts suggest metallophilic interactions that are the longest reported to date in any system. Solid state variable-temperature magnetic susceptibility studies indicate antiferromagnetic coupling betwee...

Source: Inorganica Chimica Acta - May 1, 2019 Category: Chemistry Source Type: research