CH2=CH-CH2NH2



 


























 








 









Nitrogen


Nuclear Quadrupole Coupling Constants

Allylamine


 








 








 








Calculation was made here of the N nqcc tensor in allylamine on ropt molecular structures given by  MP2/aug-cc-pVTZ and MP2/6-311+G(3df,3pd) optimizations.  Calculated nqcc's are compared with experimental values in Table 1.  Structure parameters are given in Table 2, rotational constants and electric dipole moments in Table 3.

 








In Table 1, subscripts a,b,c refer to the principal axes of the inertia tensor; x,y,z to the principal axes of the nqcc tensor.  ETA = (Xxx - Xyy)/Xzz.

RMS is the root mean square difference between calculated and experimental nqcc's (percentage of the average of the magnitudes of the experimental nqcc's).  RSD is the calibration residual standard deviation of the B3PW91/6-311+G(df,pd) model for calculation of the efg's/nqcc's.

 








 








 
   








Table 1.  14N nqcc's in Allylamine (MHz).  Calculation was made on (1) MP2/aug-cc-pVTZ and (2) MP2/6-311+G(3df,3pd) optimized molecular structures.
   










Calc (1)
Calc (2)
Expt [1]

   








Xaa -
4.293
-
4.305
-
4.04(6)


Xbb
2.313

2.319

2.21(10)


Xcc
1.980

1.986

1.83(10)


|Xab|
1.769

1.756




 







RMS

0.180 (6.7 %)

0.184 (6.8 %)




RSD
0.030 (1.3 %)

0.030 (1.3 %)



 







Xxx
2.757

2.756




Xyy
1.980
1.986



Xzz -
4.737
-
4.742




ETA -
0.164
-
0.162




 








 








 








 

Table 2.  Allylamine.  Optimized structure parameters (Å and degrees).   MP2/aug-cc-pVTZ and  MP2/6-311+G(3df,3pd). 
 



 C
 C,1,B1
 H,1,B2,2,A1
 H,2,B3,1,A2,3,D1,0
 H,2,B4,1,A3,3,D2,0
 C,1,B5,2,A4,5,D3,0
 H,6,B6,1,A5,2,D4,0
 H,6,B7,1,A6,2,D5,0
 N,6,B8,1,A7,2,D6,0
 H,9,B9,6,A8,1,D7,0
 H,9,B10,6,A9,1,D8,0

 

MP2/aug-cc-pVTZ
MP2/6-311+G(3df,3pd)
 

 B1=1.33479904
 B2=1.08613858
 B3=1.08043029
 B4=1.08181982
 B5=1.50423498
 B6=1.09296552
 B7=1.09296552
 B8=1.45520833
 B9=1.01329459
 B10=1.01329459
 A1=118.95215341
 A2=121.00312763
 A3=121.53930387
 A4=125.45212216
 A5=108.56870035
 A6=108.56870035
 A7=117.5837412
 A8=110.23387075
 A9=110.23387075
 D1=0.
 D2=180.
 D3=0.
 D4=-122.92476799
 D5=122.92476799
 D6=0.
 D7=-58.68940646
 D8=58.68940646
 B1=1.3338801
 B2=1.08603383
 B3=1.08007344
 B4=1.08126857
 B5=1.50421458
 B6=1.09225238
 B7=1.09225238
 B8=1.45370872
 B9=1.01265992
 B10=1.01265992
 A1=118.94350171
 A2=121.04626124
 A3=121.51415459
 A4=125.47008543
 A5=108.61130549
 A6=108.61130549
 A7=117.47810239
 A8=110.27596937
 A9=110.27596937
 D1=0.
 D2=180.
 D3=0.
 D4=-122.87982875
 D5=122.87982875
 D6=0.
 D7=-58.73795251
 D8=58.73795251



 













Table 3.  Allylamine.  Rotational Constants (MHz) and Dipole Moments (D).  ropt(1) = MP2/aug-cc-pVTZ, ropt(2)  = MP2/6-311+G(3df,3pd) optimized structures.
 





ropt(1) ropt(2)    Expt [1]






A 16145.9
16160.0
16107.2(40)

B   5753.8
  5763.4
  5680.834(4)

C   4455.6
  4462.2
  4409.134(4)

 




a| *
1.05
1.05
0.893(4)

b| *
0.05
0.05
0.06(2)






* B3PW91/6-311+G(df,pd) dipole moment calculated on ropt structures.


 








 








[1] G.Roussy, J.Demaison, I.Botskor, and H.D.Rudolph, J.Mol.Spect. 38,535(1971).


 








 








Allylamine, gauche







 









 









Table of Contents




Molecules/Nitrogen




 








 













allylamine.html






Last Modified 2 Nov 2013