Journal of Chemical Physics, Vol.119, No.14, 7145-7147, 2003
Interelectronic angles of group 14, 15, and 16 atoms in their low-lying multiplet states
The average interelectronic angles in position space and <(θ) over bar (12)> in momentum space are examined for the multiplet states arising from the ground electronic configurations of the group 14, 15, and 16 atoms. The angles and <(θ) over bar (12)> are greater than 90 degrees with no exceptions and two electron vectors prefer inverse directions to the same direction on average. Common to all 15 atoms, it is found that in position space, lower multiplets have larger interelectronic angles than higher multiplets. However, the opposite is true in momentum space and the interelectronic angles <(θ) over bar (12)> are smaller in lower multiplets. The differences in the angles Delta and Delta<(θ) over bar (12)> between multiplets have good linear correlations with the relative stability DeltaE of the multiplets. (C) 2003 American Institute of Physics.