Structure and electron affinity of platinum fluorides.

Area of Science:

• Inorganic Chemistry
• Quantum Chemistry
• Materials Science

Background:

• Platinum fluorides are compounds with potential applications in various chemical processes.
• Understanding their electronic structure and stability is crucial for predicting reactivity.
• Previous studies have explored some platinum fluoride species, but a systematic investigation of even-numbered molecules was lacking.

Purpose of the Study:

• To determine the structural, stability, and electron affinity properties of even-numbered platinum fluorides, PtF2n (n=1-4).
• To elucidate the ground state electronic configurations (singlet vs. triplet) of these molecules.
• To assess the energetic feasibility of forming PtF8 from PtF6 and F2.

Main Methods:

• Utilizing scalar relativistic density functional theory (DFT) calculations.
• Employing coupled cluster (CC) methods for high-accuracy electronic structure.
• Analyzing molecular geometry, vibrational frequencies, and electron detachment energies.

Main Results:

• PtF2, PtF4, and PtF6 were predicted to have triplet ground states.
• PtF8 was found to possess a singlet ground state.
• The formation of PtF8 from PtF6 and F2 was calculated to be endothermic.
• Significant differences between adiabatic and vertical electron affinities were observed only for PtF2.

Conclusions:

• The electronic ground states of platinum fluorides are dependent on the number of fluorine atoms.
• PtF8 exhibits unique electronic properties compared to its lower homologues.
• The calculated properties provide valuable data for predicting the behavior and potential synthesis of these platinum fluoride species.