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Study of Jet‐Cooled Bis(η 6 ‐Benzene)Chromium by Multiphoton Zero Kinetic Energy—Mass‐Analyzed Threshold Ionization Spectroscopy
Author(s) -
Ketkov Sergey Yu.,
Selzle Heinrich L.,
Schlag Edward W.
Publication year - 2004
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/hmxu-jqn1-5xj2-ey5d
Subject(s) - chemistry , kinetic energy , ionization , atomic physics , spectroscopy , ionization energy , excitation , electron ionization , ground state , chemical ionization , ion , rydberg formula , jet (fluid) , rydberg state , analytical chemistry (journal) , physics , organic chemistry , quantum mechanics , chromatography , thermodynamics
Zero kinetic energy‐mass‐analyzed threshold ionization (ZEKE‐MATI) spectra of jet‐cooled (η 6 ‐C 6 H 6 ) 2 Cr have been obtained for the first time with use of the 3d z 2 → R4p x,y Rydberg transition as the initial step of the electronic excitation. The ionization potential of (η 6 ‐C 6 H 6 ) 2 Cr determined on the basis of the ZEKE‐MATI experiment is 44087 ± 3 cm −1 (5.4661 ± 0.0004 eV). The binding energy of the R4p x,y electron is 17333 ± 3 cm −1 . The frequencies of the symmetric metal‐ring stretching vibration and CH umbrella vibration in the gas‐phase ground‐state molecular cation (η 6 ‐C 6 H 6 ) 2 Cr + are 262 ± 5 and 788 ± 4 cm −1 , respectively.