return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: wB97X-D/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-172.069994
Energy at 298.15K 
HF Energy-172.069994
Nuclear repulsion energy103.304182
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/aug-cc-pVTZ
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' 3149 3012 15.64 66.45 0.68 0.81
2 A' 3077 2944 6.17 107.96 0.06 0.12
3 A' 3068 2935 14.96 186.45 0.00 0.01
4 A' 2390 2287 12.34 87.51 0.15 0.26
5 A' 1511 1446 6.10 2.78 0.73 0.85
6 A' 1481 1417 6.15 7.45 0.69 0.82
7 A' 1427 1365 1.89 0.48 0.45 0.62
8 A' 1360 1301 3.39 2.49 0.43 0.60
9 A' 1102 1055 3.99 4.73 0.11 0.19
10 A' 1029 985 0.50 4.37 0.40 0.57
11 A' 849 812 0.16 6.05 0.07 0.12
12 A' 557 533 0.80 1.41 0.16 0.27
13 A' 213 204 4.61 1.96 0.70 0.83
14 A" 3152 3015 14.71 19.32 0.75 0.86
15 A" 3116 2981 0.17 82.51 0.75 0.86
16 A" 1505 1439 8.25 4.92 0.75 0.86
17 A" 1299 1242 0.00 1.96 0.75 0.86
18 A" 1122 1074 0.44 0.07 0.75 0.86
19 A" 797 763 3.61 0.38 0.75 0.86
20 A" 395 378 0.50 1.32 0.75 0.86
21 A" 217 207 1.11 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16408.5 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 15696.3 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/aug-cc-pVTZ
ABC
0.94025 0.15774 0.14218

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.561 0.000
C2 0.000 0.810 0.000
C3 -0.768 -0.432 0.000
N4 -1.359 -1.415 0.000
H5 2.039 1.512 0.000
H6 1.809 -0.002 0.882
H7 1.809 -0.002 -0.882
H8 -0.296 1.386 0.877
H9 -0.296 1.386 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52972.48473.48301.08861.08831.08832.16992.1699
C21.52971.46042.60722.15652.17042.17041.09031.0903
C32.48471.46041.14683.41472.75832.75832.07342.0734
N43.48302.60721.14684.48483.57973.57973.12213.1221
H51.08862.15653.41474.48481.76671.76672.49712.4971
H61.08832.17042.75833.57971.76671.76392.52153.0744
H71.08832.17042.75833.57971.76671.76393.07442.5215
H82.16991.09032.07343.12212.49712.52153.07441.7539
H92.16991.09032.07343.12212.49713.07442.52151.7539

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 112.375 C1 C2 H8 110.708
C1 C2 H9 110.708 C2 C1 H5 109.752
C2 C1 H6 110.873 C2 C1 H7 110.873
C2 C3 N4 179.252 C3 C2 H8 107.876
C3 C2 H9 107.876 H5 C1 H6 108.501
H5 C1 H7 108.501 H6 C1 H7 108.268
H8 C2 H9 107.089
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.810      
2 C -0.027      
3 C 0.166      
4 N -0.553      
5 H 0.255      
6 H 0.258      
7 H 0.258      
8 H 0.227      
9 H 0.227      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.367 3.431 0.000 4.168
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.259 -3.857 0.000
y -3.857 -27.709 0.000
z 0.000 0.000 -23.835
Traceless
 xyz
x -1.487 -3.857 0.000
y -3.857 -2.162 0.000
z 0.000 0.000 3.649
Polar
3z2-r27.298
x2-y20.450
xy-3.857
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.563 1.130 0.000
y 1.130 6.757 0.000
z 0.000 0.000 5.106


<r2> (average value of r2) Å2
<r2> 87.608
(<r2>)1/2 9.360