• Rapid Commun. Mass Spectrom. · Jan 2003

    Ionization energies of hypervalent Li2F, Li2Cl and Na2Cl molecules obtained by surface ionization electron impact neutralization mass spectrometry.

    • Olivera M Nesković, Miomir V Veljković, Suzana R Velicković, Ljubica T Petkovska, and Aleksandra A Perić-Grujić.
    • Vinca Institute of Nuclear Sciences, PO Box 522, 11001 Belgrade, Yugoslavia. oliveran@rt270.vin.bg.ac.yu
    • Rapid Commun. Mass Spectrom. 2003 Jan 1; 17 (3): 212-4.

    AbstractIonization energies of hypervalent Li(2)F, Li(2)Cl and Na(2)Cl molecules detected by surface ionization electron impact neutralization mass spectrometry are reported. The ionization energies were 3.78 +/- 0.2 eV for Li(2)F, 4.93 +/- 0.2 eV for Li(2)Cl, and 4.21 +/- 0.2 eV for Na(2)Cl. The ionization energies (IE) agree with theoretical ionization energies calculated by ab initio methods, supporting the theoretical prediction that Li(2)F has a hyperlithiated configuration in which the odd electron delocalizes over the two lithiums and with photoionization measurement. The first ionization energy of Na(2)Cl was experimentally confirmed earlier and for Li(2)Cl as well.8 We have developed and used this new approach for the problem--in the present work ions were first formed by surface ionization, followed by electron attachment (neutralization).Copyright 2002 John Wiley & Sons, Ltd.

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