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Updated: Dec 17, 2025

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Trichloro(Dinitrogen)Platinate(II)
Gilian T Thomas1, Sofia Donnecke1, Irina Paci1
1Department of Chemistry, University of Victoria, PO Box 1700 STN CSC, Victoria, British, Columbia, V8W 2Y2, Canada.
Abstract:
Zeise's salt, [PtCl3 (H2 C=CH2 )]- , is the oldest known organometallic complex, featuring ethylene strongly bound to a platinum salt. Many derivatives are known, but none involving dinitrogen, and indeed dinitrogen complexes are unknown for both platinum and palladium. Electrospray ionization mass spectrometry of K2 [PtCl4 ] solutions generate strong ions corresponding to [PtCl3 (N2 )]- , the identity of which was confirmed through ion-mobility spectrometry and MS/MS experiments that proved it to be distinct from its isobaric counterparts [PtCl3 (C2 H4 )]- and [PtCl3 (CO)]- . Computational analysis established a gas-phase platinum-dinitrogen bond strength of 116 kJ mol-1 , substantially weaker than the ethylene and carbon monoxide analogues but stronger than for polar solvents such as water, methanol and dimethylformamide, and strong enough that the calculated N-N bond length of 1.119 Å represents weakening to a degree typical of isolated dinitrogen complexes.
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