CH3SO2Cl






























 








Chlorine


Nuclear Quadrupole Coupling Constants


in Methane Sulfonyl Chloride


 








 









The microwave spectrum of methane sulfonyl chloride was observed by van Eijck et al. [1].  An electron diffraction molecular structure was derived by Hargittai and Hargittai [2].












Calculation of the chlorine nqcc tensors was made here on the electron diffraction structure (red), and on a structure given by MP2/6-311+G(3df,3pd) optimization (ropt).  These nqcc's are compared with the experimental values [1] in Tables 1 and 2.  Structure parameters are given in Table 3,  rotational constants in Table 4.


 








In Table 1, subscripts a,b,c refer to the principal axes of the inertia tensor, subscripts x,y,z to the principal axes of the nqcc tensor.  ETA = (Xxx - Xyy)/Xzz.  Ø (degrees) is the angle between its subscript parameters.


RMS is the root mean square difference between calculated and experimental nqcc's.  RSD is the residual standard deviation of calibration of the B1LYP/TZV(3df,2p) model for calculation of the efg's/nqcc's.

 








 








 








Table 1. 35Cl nqcc's in Methane Sulfonyl Chloride (MHz).  Calculation was made on red and ropt molecular structures.

 










Calc /red
Calc /ropt
Expt [1]

 








Xaa -
66.80
-
66.48
-
65.7(4)


Xbb
30.57

30.56

29.9(3)


Xcc
36.23

35.92

35.8(3)


Xab
  5.69

  6.44













RMS

0.78 (1.8 %)

0.59 (1.3 %)




RSD
0.49 (1.1 %)
0.49 (1.1 %)












Xxx
30.91

30.98




Xyy
36.23

35.92




Xzz -
67.13
-
66.90




ETA
0.0792

0.0738




Øz,a
3.33

3.78




Øa,SCl
4.43

3.99




Øz,SCl
1.10

0.21













   








 








 








Table 2. 37Cl nqcc's in Methane Sulfonyl Chloride (MHz).  Calculation was made on red and ropt molecular structures.

 










Calc /red
Calc /ropt
Expt [1]

 








Xaa -
52.66
-
52.40
-
51.6(5)


Xbb
24.11

24.09

23.8(4)


Xcc
28.55

28.31

27.8(4)


Xab
  4.35

  4.99













RMS

0.77 (2.2 %)

0.57 (1.7 %)




RSD
0.44 (1.1 %)
0.44 (1.1 %)













 










 


Table 3.  Methane Sulfonyl Chloride (MHz).  Molecular structure parameters, red and ropt (Å and degrees).








  red   ropt






SCl
2.046(4)
2.0497
S=O
1.424(3)
1.4277
SC
1.763(5)
1.7581
CH(6)
1.101(13)
1.0879
CH(7,8) 1.101(13) 1.0845
CSCl
101.0(15)
  99.56
ClS=O
107.1(7)
106.91
O=S=O
120.8(24)
122.07
SCH(6)
105.40
SCH(7.8)
108.41


H(6)H(7,8)
112.0(20)
111.11


H(7)H(8)
112.0(20)
112.08






















 



Table 4.  Methane Sulfonyl Chloride, 35Cl species.  Rotational Constants (MHz). 







Calc /red Calc /ropt   Expt [1]






A 4661
4634
4636.421(5)

B 2776
2779
2787.938(5)

C 2674
2690
2682.889(5)


 








 









 








[1] B.P. van Eijck, A.J.Korthof, and F.C.Mijlhoff, J.Mol.Struct. 24,222(1975).


[2] M.Hargittai and I.Hargittai, J.Chem.Phys. 59,2513(1973).

 









 









Table of Contents




Molecules/Chlorine




 








 













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Last Modified 24 May 2014