A non-metal-to-metal I⁺-Ag⁺ coordination bond

Area of Science:

• Inorganic Chemistry
• Crystal Engineering
• Chemical Bonding

Background:

• Metal-metal bonds are common in coordination chemistry.
• Bonds between non-metal and metal cations are exceptionally rare.
• Understanding novel bonding interactions is crucial for advancing chemical synthesis.

Purpose of the Study:

• To report the discovery and structural characterization of a unique non-metal to metal cation bond.
• To investigate the nature of the I-Ag bond in the synthesized complex.
• To provide theoretical support for the observed bonding.

Main Methods:

• X-ray crystallography was used to determine the precise atomic arrangement.
• Synthesis of the novel complex [Ag(m-O3SCF3)2{(4MePyNO)2I}]2 (1-AgI).
• Density Functional Theory (DFT) calculations were employed to analyze the electronic structure and bonding.

Main Results:

• An unprecedented I+-Ag+ coordination bond was identified in complex 1-AgI.
• The bond length of the I+-Ag+ interaction is comparable to known metal-metal bonds.
• DFT calculations confirmed the existence and nature of the I+-Ag+ bond.

Conclusions:

• The study presents the first structural evidence of a direct coordination bond between a non-metal cation (iodine) and a metal cation (silver).
• This discovery broadens the scope of known coordination bond types.
• The findings pave the way for exploring new chemical spaces and designing novel materials with unique properties.