Additive trans-influences of the axial ligand and metal-metal bond in diplatinum(III) complex leading to an asymmetric structure with penta- and hexacoordination of the two metals

Synthesis, structure, and platinum-195 NMR solution studies of a reactive binuclear platinum(III) complex: bis(ethylenediamine)nitratonitrobis(2-pyridonato)diplatinum(2+) dinitrate hemihydrate

“…In the extreme, coordination of nitrite to the platinum atom, Pt(2), having a N202 donor set in the equatorial plane may result in no axial ligand at all bound to the other platinum in a metal-metal-bonded system. 34 The exocyclic oxygen atoms may render Pt(2) more susceptible than Pt(l) to coordination by a strong nucleophile. Further insight into the axial ligand preferences of bridged binuclear Pt(III) complexes awaits the structural characterization of additional head-to-head compounds having mixed axial ligands and, possibly, calculations of the platinum charge densities in this system.…”

Coordination Isomers of Trinuclear Pt2Hg Complex That Differ in Type of Metal–Metal Bond

“…The coordinatively naked Hg resembles a coordinatively naked Pt 0 in [Pt 3 (dppp) 2 (Me 2 C 6 H 3 CN) 2 ] 2+ . The Cl – is located at an axial position and the Pt–Cl distances are 2.538(2) and 2.554(2) Å, which are slightly elongated from the normal Pt–Cl distance, but similar to that of a Pt–Cl bond trans to a Pt–M bond owing to the trans influence of the Pt–M bond. − …”

One-dimensional Magnus-type platinum double salts

“…17 ). In the past half century, a variety of highly coloured platinum complexes 18 have been isolated including red 19 , orange 20 , yellow 21 22 , green 23 24 and blue 25 Pt-chain materials. In the case of tetranuclear platinum complexes, these colours arise from a variety of oxidation states including Pt 2+ (Pt(II) 4 ), Pt 2.25+ (Pt(II) 3 Pt(III)), Pt 2.5+ (Pt(II) 2 Pt(III) 2 ) and Pt 3+ (Pt(III) 4 , although the fully oxidized systems tend to behave as dimers with two axial donors).…”