Table 1.

Observed CS2 isotopologues, isotopologue masses (u), rotational constants (kHz), and centrifugal distortion constants (Hz)

Rotational constant Beff*Centrifugal distortion Deff
IsotopologueMassStateThis workLiteratureRef.This workLiteratureRef.
32S12C32S76Σg3,271,517.0 (0.7)3,271,516.5 (1.5)20355 (3)352.79 (9)20
76Πue3,276,738 (9)3,276,759 (12)18347 (58)359.1 (6)18
76Πuf3,279,064 (7)3,279,077 (11)18386 (38)360.6 (6)18
32S13C32S77Σg3,271,634.6 (1.3)3,271,637.8 (0.3)21346 (7)350.76 (2)21
32S12C33S77Σg3,221,849.4 (2.6)3,221,843 (11)18329 (13)341.3 (1.1)18
32S12C34S78Σg3,175,020.4 (1.2)3,175,024 (8)18318 (6)332.6 (5)18
32S13C34S79Σg3,175,120 (18)3,175,115.1 (1.3)21318 (95)332.94 (15)21
34S12C34S80Σg3,079,422 (9)3,079,377 (27)18339 (48)346 (16)22
  • The most precise literature values are given for comparison. Values in parentheses denote the 1σ standard deviation for the corresponding last digits.

  • * For the vibrationally excited Πu states, Beff differs from B due to the l-type splitting.