Linear heterotrinuclear complexes derived from an alkyl platinum(II) twelve-membered macrocycle

Area of Science:

• Coordination Chemistry
• Supramolecular Chemistry
• Organometallic Chemistry

Background:

• The P,N,P-tridentate ligand 2,6-bis(diphenylphosphino)pyridine (L) is a versatile building block in coordination chemistry.
• Macrocyclic complexes offer unique host-guest properties for ion encapsulation.
• Metal-metal interactions, such as dative bonds and argentophilic interactions, are crucial for stabilizing complex structures.

Purpose of the Study:

• To synthesize and characterize novel metallomacrocyclic and heterotrinuclear complexes.
• To investigate the encapsulation capabilities of the metallomacrocyclic host species.
• To explore the formation and stabilization of metal-metal dative bonds in linear complexes.

Main Methods:

• Synthesis of a twelve-membered metallomacrocyclic host species cis-Pt(2)Me(4)(mu-L)(2).
• Synthesis of two linear heterotrinuclear complexes: [Me(2)Pt(mu-L)(2)Ag(2)(MeCN)(2)](BF(4))(2).MeCN and [(CO)(3)Fe(mu-L)(2)Ag(2)(Et(2)O)](ClO(4))(2).
• Characterization of the synthesized complexes using spectroscopic and crystallographic techniques (implied).

Main Results:

• The metallomacrocyclic host species successfully encapsulated thallium(I) (Tl(I)) and copper(I) (Cu(I)) guest ions.
• Two linear heterotrinuclear complexes were synthesized, featuring Pt-->Ag and Fe-->Ag dative bonds.
• The d(10)-d(10) argentophilic interaction was identified as a stabilizing force in the linear complexes.

Conclusions:

• The P,N,P-tridentate ligand (L) is effective in constructing complex multinuclear coordination compounds.
• Metallomacrocycles can act as hosts for specific metal ions.
• The study demonstrates the formation of metal-metal dative bonds stabilized by argentophilic interactions in linear complexes.