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All results from a given calculation for C2H5CN (ethyl cyanide)

using model chemistry: wB97X-D/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at wB97X-D/CEP-31G*
 hartrees
Energy at 0K-29.854969
Energy at 298.15K 
HF Energy-29.854969
Nuclear repulsion energy55.177472
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at wB97X-D/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3167 3167 41.77 69.17 0.72 0.83
2 A' 3110 3110 13.65 139.91 0.07 0.13
3 A' 3092 3092 31.22 122.08 0.02 0.04
4 A' 2385 2385 19.63 62.83 0.22 0.36
5 A' 1514 1514 7.63 6.96 0.75 0.86
6 A' 1490 1490 5.52 15.95 0.74 0.85
7 A' 1432 1432 1.73 4.59 0.09 0.16
8 A' 1355 1355 4.60 2.76 0.75 0.86
9 A' 1100 1100 5.50 6.44 0.27 0.42
10 A' 1029 1029 1.76 6.92 0.52 0.69
11 A' 846 846 0.51 7.40 0.16 0.27
12 A' 541 541 1.48 2.19 0.40 0.57
13 A' 210 210 3.30 3.27 0.73 0.85
14 A" 3179 3179 47.60 6.48 0.75 0.86
15 A" 3155 3155 0.12 108.70 0.75 0.86
16 A" 1509 1509 8.98 15.23 0.75 0.86
17 A" 1292 1292 0.02 10.97 0.75 0.86
18 A" 1110 1110 1.12 0.08 0.75 0.86
19 A" 783 783 4.54 0.14 0.75 0.86
20 A" 384 384 0.00 3.23 0.75 0.86
21 A" 215 215 0.88 0.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16447.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16447.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at wB97X-D/CEP-31G*
ABC
0.90605 0.15327 0.13794

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.526 0.570 0.000
C2 0.000 0.833 0.000
C3 -0.776 -0.438 0.000
N4 -1.373 -1.449 0.000
H5 2.063 1.531 0.000
H6 1.824 0.001 0.892
H7 1.824 0.001 -0.892
H8 -0.300 1.408 0.888
H9 -0.300 1.408 -0.888

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.54812.51273.53261.10041.09981.09982.19622.1962
C21.54811.48932.66332.17792.19442.19441.09921.0992
C32.51271.48931.17413.45482.78322.78322.10262.1026
N43.53262.66331.17414.54803.62163.62163.17783.1778
H51.10042.17793.45484.54801.78711.78712.52782.5278
H61.09982.19442.78323.62161.78711.78452.54783.1080
H71.09982.19442.78323.62161.78711.78453.10802.5478
H82.19621.09922.10263.17782.52782.54783.10801.7756
H92.19621.09922.10263.17782.52783.10802.54781.7756

picture of ethyl cyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.615 C1 C2 H8 110.975
C1 C2 H9 110.975 C2 C1 H5 109.467
C2 C1 H6 110.799 C2 C1 H7 110.799
C2 C3 N4 179.177 C3 C2 H8 107.681
C3 C2 H9 107.681 H5 C1 H6 108.635
H5 C1 H7 108.635 H6 C1 H7 108.447
H8 C2 H9 107.741
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.456      
2 C -0.100      
3 C -0.647      
4 N 0.382      
5 H 0.174      
6 H 0.161      
7 H 0.161      
8 H 0.162      
9 H 0.162      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.350 3.435 0.000 4.162
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.899 -3.760 0.000
y -3.760 -27.144 0.000
z 0.000 0.000 -23.374
Traceless
 xyz
x -1.640 -3.760 0.000
y -3.760 -2.007 0.000
z 0.000 0.000 3.647
Polar
3z2-r27.295
x2-y20.245
xy-3.760
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.497 1.182 0.000
y 1.182 5.888 0.000
z 0.000 0.000 4.017


<r2> (average value of r2) Å2
<r2> 73.167
(<r2>)1/2 8.554