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Studies on Atomic Spectroscopic Terms and Term Symbols of Non-equivalent Electrons of d2s1p1 Configuration Using Russell- Saunders Coupling Scheme

Author Affiliations

  • 1Department of Chemistry, M.L.S. University, Udaipur, Rajasthan-313001, INDIA
  • 2Department of Chemistry, M.L.V. Govt. College, Bhilwara, Rajasthan-311001, INDIA

Res.J.chem.sci., Volume 3, Issue (4), Pages 19-24, April,18 (2013)


Russell-Saunders (R-S) coupling scheme is an important coupling scheme to determine the terms and to assign the term symbols to the terms to the valence electrons of free atoms. The atomic term symbols provide the information about the energy of atomic valence electrons, total spin, total orbital angular momentum, total angular momentum, spectral and magnetic properties of atom. In this proposed work computation is done to determine all the possible terms for the non-equivalent valence electrons of d2s1p1 configuration manually and the term symbols are assigned to the terms using Russell-Saunders coupling scheme. The possible microstates calculated for the non-equivalent electrons of d2s1p1 configuration are 540 and the total numbers of atomic spectroscopic terms determined from these microstates are 38 (17 types), 6 are quintets (5 types), 17 are triplets (6 types) and 13 are singlet′s (6 types). The ground state term for the non-equivalent electrons of d2s1p1 configuration is quintet G (5G) and the ground state is quintet G two (5G2).


  1. Hollas J.M., Modern Spectroscopy, Wiley India Pvt. Ltd., (2010)
  2. Mehlman G., Balloffet and Estewa J.M., Far-Ultraviolet Absorption Spectra with Auto-Ionized Levels of Beryllium and Magnesium, Astrophisic J., 157,957-956, (1969)
  3. Wopg E.Y., Configuration Interaction of the Pr3+ Ion, J. Chem. Phys., 38(4), 976 (1963)
  4. Lever A.B.P., The Electronic Spectra of Transition Metal Complexes with F (Free Ion) Ground Terms Derivation of Dq and B., J. Chem. Ed., 45, 711-712 (1968)
  5. Puri B.R., Sharma L.R. and Pathania M.S., Principle of Physical Chemistry, Vishal Publishing Company, New Delhi (2008)
  6. Goyal R., M. Phil. Dissertation, MDS University, Ajmer (2007)
  7. Lee J.D., Concise Inorganic Chemistry, Chapman and Hall, London (1996)
  8. Huheey J.E., Keiter E.A. and Keiter R.L., Inorganic Chemistry: Principles of Structure and Reactivity, Harper Collins College, New York (2001)
  9. Dougles B.E. and McDaniel D.H., Concepts of Model of Inorganic Chemistry, Oxford and IBH Publishing Company, New Delhi (1970)
  10. Bethe H., Splitting of Terms in Crystals, Amm. Physik, 3, 121 (1929)
  11. Kiremire E.M.R., A Numerical Algorithm Technique for Deriving Russell-Saunders (R-S) Terms, J.Chem. Education, 64(11), 951-953 (1987)
  12. Shriver D.F. and Atkins P.W., Inorganic Chemistry, Oxford University Press, New York (2002)
  13. Condon E.U. and Shorttley G.H.,The theory of atomic spectra, Cambidge University press, London (1963)
  14. McDaniel D.H., Spin factoring as an aid in the determination of spectroscopic terms, J. Chem. Educ., 54(3), 147 (1977)
  15. Meena P.L., Jain P.K., Kumar N., Meena K.S., and Goyal R., Study on the atomic term symbols for f4 (M+3 free ion) configuration, J. Chem. Bio. Phy. Sci, 1(2), 188-203 (2011)
  16. Meena P.L., Jain P.K., Kumar N.and Meena K.S., A comparative study of the atomic term symbols of f3 and f11 configuration, Acta Chim. Pharm. Indica, 2(1), 32-45 (2012)
  17. Meena P.L., Jain P.K., Kumar N.and Meena K.S., Study on the atomic term symbols for f3 (M3+ free ion) configuration, Int. J. Chem. Sci., 9(3), 1364-1372 (2011)
  18. Meena P.L., Jain P.K., Kumar N.and Meena K.S., Calculation of atomic spectroscopic terms for non-equivalent electrons of f2 d1 configuration and assigning the term symbols, Asian Journal of Chemistry, 24(12), 5677-5679 (2012)