We present a combined anion photoelectron spectroscopic and quantum chemical investigation on the structures and bonding properties of CPt2−/0 and CPt2H−/0. The experimental vertical detachment energies of CPt2− and CPt2H− are measured to be 1.91 ± 0.08 and 3.54 ± 0.08 eV, respectively. CPt2− is identified as a C2v symmetric Pt—C—Pt bent structure, and CPt2 has a D∞h symmetric Pt—C—Pt linear structure. Both anionic and neutral CPt2H adopt a Pt—C—Pt—H chain-shaped structure, in which the ∠PtCPt and ∠CPtH bond angles of CPt2H− are larger than those of CPt2H. The Pt—C bonds in CPt2−/0 and CPt2H−/0 exhibit covalent double bonding characters. The Pt=C bonds are much stronger than the C—H bond that may explain why the C atom CPt2H−/0 prefers to form Pt=C bonds rather than C—H bonds. It may also explain why platinum can insert into the C—H bond to activate the C—H bond as reported in the literature.
Structures and bonding properties of and : Anion photoelectron spectroscopy and quantum chemical calculations
Sheng-Jie Lu, Xi-Ling Xu, Hong-Guang Xu, Wei-Jun Zheng; Structures and bonding properties of and : Anion photoelectron spectroscopy and quantum chemical calculations. J. Chem. Phys. 14 December 2019; 151 (22): 224303. https://doi.org/10.1063/1.5130589
Download citation file: