The photoelectron spectrum of phosphorus pentafluoride

Experimental and ab initio study of the infrared spectra of ionic species derived from PF5, PF3, and F3PO and trapped in solid neon

“…Because the ground state of PF 5 ϩ is unstable, results are given only for PF n ϩ (nϭ1 -4) in Table III. On the other hand, F-atom and F Ϫ migration may lead to the stabilization of PF 6 Ϫ in some of the experiments. Accordingly, Table V reports the results of calculations for PF n Ϫ (nϭ1-6͒.…”

“…A flowing afterglow Langmuir probe experiment 49 indicates that nondissociative electron attachment to PF 5 occurs. Some PF 6 Ϫ was also formed by the reaction of PF 5 with PF 5 Ϫ . However, these workers found very little evidence for electron attachment to PF 3 .…”

“…Crystalline K ϩ PF 6 Ϫ has a strong infrared absorption at 830 cm Ϫ1 and a moderately intense absorption at 558 cm Ϫ1 . 50 In a Raman spectroscopic study 51 of the solid adducts of SF 4 with several fluoride acceptors, including PF 5 , 3 ( f 1u ) of PF 6 Ϫ was identified at 815 cm Ϫ1 , 1 (a 1g ) at 748 cm Ϫ1 , 2 (e g ) and possibly 4 ( f 1u ) between 558 and 580 cm Ϫ1 , and 5 ( f 2g ) between 463 and 479 cm Ϫ1 . These results are consistent with the calculations given for PF 6 Ϫ in Table V.…”

“…50 In a Raman spectroscopic study 51 of the solid adducts of SF 4 with several fluoride acceptors, including PF 5 , 3 ( f 1u ) of PF 6 Ϫ was identified at 815 cm Ϫ1 , 1 (a 1g ) at 748 cm Ϫ1 , 2 (e g ) and possibly 4 ( f 1u ) between 558 and 580 cm Ϫ1 , and 5 ( f 2g ) between 463 and 479 cm Ϫ1 . These results are consistent with the calculations given for PF 6 Ϫ in Table V. These calculations predict that there should be a very strong infrared absorptions for PF 6 Ϫ between 810 and 854 cm Ϫ1 .…”

“…[1][2][3][4] Relatively little is known about the production of ions from PF 5 and PF 3 . The photoelectron spectrum 5,6 of PF 5 has a gradual onset, with the first vertical ionization potential near 15.6 eV. Electron impact studies on PF 5 by Neskovic and co-workers 7 yielded an appearance potential of 14.98 eV for PF 4 ϩ .…”