Transcription of Term Symbols and Molecular Spectroscopy - …
1 Term Symbols and Molecular Spectroscopy Atomic Term Symbols - Oxygen L 0 1 2 3. Term S P D F. ground state: (1s)2 (2s)2 (2p)4 L = ML,max = +1+1+ 0 -1 = 1 3P. +1 0 -1. 2 2 4. excited states: (1s) (2s) (2p) L = ML,max = +1+1+ 0 +0 = 2 1D. +1 0 -1 and 1S. Homonuclear Diatomics* O2 ground state: KK ( g,2s)2( *u ,2s)2( g,2pz)2( u,2p)4( *g ,2p)2. u g . u . g . = +1+1-1-1+1-1 = 0 = +1+1-1-1+1+1 = 2 = +1+1-1-1+1-1 = 0. 3 - 1 +. g 1. g g ( g,2pz)2( u,2p)3( *g ,2p)3 ( g,2pz)1( u,2p)4( *g ,2p)3.. = +1+1-1+1-1-1 = 0 = +1+1-1+1+1-1 = 2 ? ? 3 + 3 - u + u + 3 u 70000. O( 3P) + O( 1D) 8- 60000. 50000 3 . u 6 - O( 3P) + O(3 P). E 40000. 3 +. (cm-1) u 4 - 30000. eV. 20000. 1 + 2 - g 10000 1 . g 3 . g 0. 1 2 3 4. R ( ). * Configuration diagrams are schematic. No single diagram can represent an open shell system. These diagrams do not take into account electron indistinguishability and orbital degeneracy.
