Transition metal carbon quadruple bond: viability through single electron transmutation

Area of Science:

• * Inorganic Chemistry
• * Organometallic Chemistry
• * Theoretical Chemistry

Background:

• * Quadruple bonding is exceptionally rare in main group elements despite their available valence orbitals.
• * Understanding bonding in main group and transition metal compounds is crucial for chemical innovation.

Purpose of the Study:

• * To report the first instance of quadruple bonding between a carbon atom and a transition metal fragment, specifically Fe(CO)3.
• * To analyze and confirm the nature of this unprecedented C[Chemical Bond]Fe quadruple bond using theoretical methods.
• * To test the validity of the single electron transmutation concept in explaining observed bonding similarities.

Main Methods:

• * High-level theoretical calculations were employed to model the chemical system.
• * Various bonding analyses were performed to scrutinize the C[Chemical Bond]Fe interaction.
• * The single electron transmutation concept was applied and evaluated.

Main Results:

• * Unprecedented quadruple bonding between a carbon atom and the Fe(CO)3 fragment was computationally demonstrated.
• * Bonding analyses confirmed the unique and robust nature of the C[Chemical Bond]Fe quadruple bond.
• * The single electron transmutation concept successfully reproduced structural and bonding similarities between periodic neighbors.

Conclusions:

• * The study establishes a novel quadruple bonding interaction involving a main group element (carbon) and a transition metal fragment.
• * Theoretical findings provide strong evidence for the existence and characteristics of the C[Chemical Bond]Fe quadruple bond.
• * The research validates the utility of the single electron transmutation concept for predicting and understanding bonding in complex chemical systems.