Abstract
The collision induced dissociation (CID) of small gas phase platinum and platinum carbonyl cluster anions, Ptm− and Ptm(CO)n− (m=3−6), has been studied using a guided ion beam tandem mass spectrometer. The threshold energies obtained from analysis of the CID cross sections for carbonyl and metal atom loss are equated with binding energies. The binding energies of CO to the platinum cluster anions are indicative of two different binding sites, terminal (about 80–110 kJ/mol) and bridged (220–250 kJ/mol). Energies required to removed platinum atoms from the bare cluster anions are 410–470 kJ/mol, a substantial fraction of the bulk enthalpy of vaporization, 570 kJ/mol. Using threshold energies for both primary and secondary CID products in thermodynamic cycles, we have determined thermochemical stabilities of additional neutral and anionic platinum carbonyl species.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 8:15 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 5, 2024, 5:49 p.m.) |
Indexed | 4 months ago (April 16, 2025, 1:04 p.m.) |
Issued | 28 years, 2 months ago (June 15, 1997) |
Published | 28 years, 2 months ago (June 15, 1997) |
Published Print | 28 years, 2 months ago (June 15, 1997) |
@article{Grushow_1997, title={Ligand and metal binding energies in platinum carbonyl cluster anions: Collision-induced dissociation of Ptm− and Ptm(CO)n−}, volume={106}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.474116}, DOI={10.1063/1.474116}, number={23}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Grushow, Alexander and Ervin, Kent M.}, year={1997}, month=jun, pages={9580–9593} }