B2H5Cl

















 





 









Boron and Chlorine


Nuclear Quadrupole Coupling Constants


in Chlorodiborane


 








 








 


 





In Tables 1 and 2, the subscripts a,b,c refer to the principal axes of the inertia tensor.   Subscripts x,y,z refer to the principal axes of the nqcc tensor.  The nqcc y-axis is chosen coincident with the c-axis.  Ø (degrees) is the angle between its subscripted parameters.  ETA = (Xxx - Xyy)/Xzz.

 








RMS is the root measn square difference between calculated and experimental diagonal nqcc.  RSD is the residual standard deviation of the calibration of the computional model for calculation of the nqcc's.

 








   







Table 1. Boron nqcc's in B2H535Cl (MHz).
   










Calc.
Expt.
   







11B(1) Xaa - 0.730




Xbb - 1.848




Xcc
2.579




|Xab|
1.234



 






11B(2) Xaa
0.156




Xbb - 2.129



  Xcc
1.972




|Xab|
0.175



 







 








 









   







Table 2.  Chlorine nqcc's in 11B2H5Cl (MHz).
   










Calc.
Expt. [1]
   







35Cl Xaa - 31.63 - 32.1(8)


Xbb
16.16
16.3(1)


Xcc
15.47
15.8(5)


|Xab|
27.80



 







RMS
0.3   (1.6 %)




RSD
0.49 (1.1 %)



 







Xxx
28.92




Xyy
15.47




Xzz - 44.39




ETA - 0.303




Øz,a
24.66




Øa,BCl
25.6




Øz,BCl
  0.9



 






37Cl Xaa - 25.04




Xbb
12.85




Xcc
12.19




|Xab|
21.81



 







 








 







 
 

Table 3. Molecular structure parameters, rs [1] (Å and degrees).




BB 1.776

B(2)Cl 1.766

BHt 1.196 [2]

Hb ... Hb 2.03

BBCl 121.1

BBHt 119.9 [2]



 








 








[1] M.Sugie, H.Takeo, and C.Matsumura, J.Mol.Struct. 131,225(1985).

[2] A.C.Ferguson and C.D.Cornwell, J.Chem. Phys. 53,1851(1970).

 








 








B2H6 B2H5Br B2H5NH2


 








 








Table of Contents




Molecules/Boron




Molecules/Chlorine




 








 













B2H5Cl.html






Last Modified 31 Oct 2008