Multimetallic complexes based on a diphosphine-dithiocarbamate "Janus" ligand.

Area of Science:

• Coordination Chemistry
• Organometallic Chemistry
• Materials Science

Background:

• Exploration of novel ligand architectures is crucial for developing new metal complexes.
• Bifunctional ligands offer versatile coordination modes for constructing complex molecular architectures.
• Understanding ligand-metal interactions is key to designing functional inorganic materials.

Purpose of the Study:

• To synthesize and characterize novel metal complexes utilizing aminodiphosphine and dithiocarbamate ligands.
• To investigate the coordination behavior of a new bifunctional ligand with various transition metals.
• To explore the formation of mono-, bi-, and multinuclear complexes with diverse structural motifs.

Main Methods:

• Synthesis of aminodiphosphine ligand HN(CH2CH2PPh2)2 and its reaction with M(CO)4(pip)2 (M = Mo, W).
• Development of a new bifunctional ligand KS2CN(CH2CH2PPh2)2.
• Reactions of KS2CN(CH2CH2PPh2)2 with various metal precursors including Ni, Co, Au, Pd, Pt, Ru, Re, and Os, followed by structural characterization.

Main Results:

• Formation of mononuclear complexes [M{κ(2)-HN(CH2CH2PPh2)2}(CO)4] (M = Mo, W) and [Mo{κ(3)-HN(CH2CH2PPh2)2}(CO)3].
• Synthesis of [Ni{S2CN(CH2CH2PPh2)2}2] and [Co{S2CN(CH2CH2PPh2)2}3].
• Construction of diverse multinuclear complexes including pentametallic [Ni{S2CN(CH2CH2PPh2AuCl)2}2], cyclic [Pd{S2CN(CH2CH2PPh2)2}]2, oligomeric [Pt{S2CN(CH2CH2PPh2)2}]n, and bimetallic compounds with Ru, Mo, W, Re, and Os.

Conclusions:

• The developed bifunctional ligand KS2CN(CH2CH2PPh2)2 is a versatile building block for constructing a wide range of metal complexes.
• The coordination chemistry of this ligand allows for the formation of diverse nuclearities and structural types, including mononuclear, bimetallic, and multinuclear species.
• The study highlights the potential of these novel complexes in coordination chemistry and materials science.