[CTi7(2+)]: Heptacoordinate Carbon Motif?

Area of Science:

• Computational Chemistry
• Materials Science
• Inorganic Chemistry

Background:

• The exploration of novel carbon coordination environments is crucial for advancing materials science.
• Understanding the stability and properties of hypercoordinate carbon species is an ongoing research area.

Purpose of the Study:

• To computationally predict and characterize a novel heptacoordinate carbon motif, [CTi7(2+)].
• To investigate the stability of this motif within a neutral chemical species.
• To design and assess the electronic properties of a quasi-one-dimensional nanowire incorporating this motif.

Main Methods:

• Ab initio computation was employed to predict the structure and stability of the [CTi7(2+)] motif.
• Density Functional Theory (DFT) calculations were used to evaluate the electronic properties of the proposed nanowire.

Main Results:

• The [CTi7(2+)] motif was predicted to be highly stable with D5h symmetry.
• A significant HOMO-LUMO gap and a high lowest vibrational frequency (>95 cm(-1)) indicate chemical stability.
• The neutral species [CTi7(2+)][BH4(-)]2 confirmed the motif's stability.
• A quasi-one-dimensional nanowire, [CTi7]n[C16H8]n, was designed, predicted to exhibit metallic properties.

Conclusions:

• The heptacoordinate carbon motif [CTi7(2+)] represents a stable, novel structural unit.
• This motif can be utilized to construct quasi-one-dimensional organometallic nanowires.
• The predicted metallic nature of the nanowire opens avenues for potential electronic applications.