Experimental Search for the Smallest Stable Multiply Charged Anions in the Gas Phase
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99352 (United States)
An extensive experimental search for the smallest stable gaseous multiply charged anions (MCAs) was pursued. Four penta-atomic dianions, PtX{sub 4}{sup 2{minus}} and PdX{sub 4}{sup 2{minus}} (X=Cl,thinspBr) , were found to be the smallest observable using an electrospray ion source. Photodetachment experiments revealed, however, that PtCl{sub 4}{sup 2{minus}} and PtBr{sub 4}{sup 2{minus}} are electronically metastable with negative electron-binding energies. PdCl{sub 4}{sup 2{minus}} and PdBr{sub 4}{sup 2{minus}} were found to be electronically stable, but thermodynamically unstable against fragmentation. Lifetimes were estimated using an ion-trap technique for the four observed metastable MCAs, providing further insight into their electronic and thermodynamic stability. {copyright} {ital 1999} {ital The American Physical Society }
- OSTI ID:
- 692559
- Journal Information:
- Physical Review Letters, Vol. 83, Issue 17; Other Information: PBD: Oct 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of temperature on the crystal and molecular structure of the mixed-valence linear chain [Pt(en)[sub 2]][Pt(en)[sub 2]X[sub 2]](ClO[sub 4])[sub 4] (X = Cl, Br)
A hydrogen atom in an organoplatinum-amine system. 1. Synthesis and spectroscopic and crystallographic characterization of novel zwitterionic complexes with a Pt(II)[sup [minus]][center dot][center dot][center dot]H-N[sup +] unit