Ground state electron affinities based on " Generation of negative ions from SF₆ gas by means of hot surface ionization" : A. Pelc, Rapid Commun. Mass Spectrom. 2012, 26, 577–582

Negative surface ionization electron affinities and activation energies of SFn

“…. We determined the AE a values: (eV) SF 6 , 3.0(1); SF 5 , 3.85(2); SF 4 , 2.7(1) from the decrease in the NSI data at temperatures above 2470 K . Here, we predict multiple AE a (SF n ) values (n = 1 to 6), given in Fig.…”

“…We estimated 27 antibonding AE a (O 2 ), 27 non‐bonding and 30 antibonding AE a (NO) and constructed the Herschbach Ionic Morse Person Electron Curves, HIMPEC, for the 54 superoxide states and the 87 NO(‐) states shown in Fig. …”

“…The magnetron, MGN AE a (SF 6 ), 1.49 (22) eV value reported in the 1960s was the largest energy difference for SF 6 in the National Institute of Standards and Technology (NIST) database (NIST, Gaithersburg, MD, USA) until the 1995 E pd (SF 6 ), 3.15999 eV value was added. [1][2][3][4][5][6][7][8][9][10][15][16][17][18][19][20][21][22][23][24][25][26] However, the AE a (SF 6 ), 1.49 (22) eV, is not assigned to the ground state since all MGN values in the NIST database are accompanied by the statement "The Magnetron method, lacking mass analysis, is not considered reliable." [1][2][3][4][5] In a 2002 review, Rienstra-Kiracofe et al declared, "Perhaps the best experimental value for the EA(SF 6 ) is 1.07 (7) eV, as determined by Chen, Wiley, Batten, and Wentworth in 1994 using thermal electron attachment negative ion mass spectrometry.…”

“…1. [1,3,5,17,[26][27][28][29][30][31][32][33][34][35][36] In 2012, Pelc reported ion intensities, I X , of SF n (n = 1 to 6), F, and F 2 from the negative surface ionization, NSI, mass spectra of SF 6 , illustrated by the electronically digitized spectrum shown in Fig. 2.…”

“…2. We determined the AE a values: (eV) SF 6 , 3.0(1); SF 5 , 3.85(2); SF 4 , 2.7(1) from the decrease in the NSI data at temperatures above 2470 K. [25,26] Here, we predict multiple AE a (SF n ) values (n = 1 to 6), given in Fig. 3, report multiple AE a (SF n ) and activation energies for thermal electron attachment, E 1 (SF n ), from thermal data using the same procedures as applied to SF 6 , O 2 and NO in Fig.…”