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

using model chemistry: wB97X-D/6-31G*

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/6-31G*
 hartrees
Energy at 0K-172.006912
Energy at 298.15K 
HF Energy-172.006912
Nuclear repulsion energy102.775176
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/6-31G*
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' 3174 3010 17.57 75.17 0.71 0.83
2 A' 3092 2933 8.97 71.50 0.12 0.22
3 A' 3088 2929 15.35 135.55 0.01 0.02
4 A' 2403 2279 8.50 54.71 0.29 0.46
5 A' 1539 1460 6.53 11.16 0.74 0.85
6 A' 1509 1432 5.37 17.96 0.72 0.84
7 A' 1453 1378 2.18 2.72 0.63 0.78
8 A' 1378 1307 3.07 5.33 0.60 0.75
9 A' 1114 1056 5.43 3.30 0.17 0.29
10 A' 1039 985 0.77 5.64 0.49 0.66
11 A' 855 811 0.24 4.87 0.18 0.31
12 A' 555 527 1.04 2.01 0.42 0.59
13 A' 214 203 4.34 2.94 0.73 0.84
14 A" 3177 3014 16.70 27.70 0.75 0.86
15 A" 3136 2974 1.22 96.68 0.75 0.86
16 A" 1533 1454 8.34 19.68 0.75 0.86
17 A" 1310 1243 0.03 8.41 0.75 0.86
18 A" 1135 1077 0.27 0.10 0.75 0.86
19 A" 806 765 4.67 0.39 0.75 0.86
20 A" 398 378 0.38 3.67 0.75 0.86
21 A" 223 211 1.05 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16565.8 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 15712.7 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/6-31G*
ABC
0.93185 0.15621 0.14081

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.514 0.565 0.000
C2 0.000 0.814 0.000
C3 -0.769 -0.434 0.000
N4 -1.365 -1.426 0.000
H5 2.045 1.521 0.000
H6 1.816 0.001 0.886
H7 1.816 0.001 -0.886
H8 -0.295 1.395 0.880
H9 -0.295 1.395 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53432.49203.50021.09351.09301.09302.17622.1762
C21.53431.46632.62362.16322.17852.17851.09511.0951
C32.49201.46631.15743.42622.76752.76752.08462.0846
N43.50022.62361.15744.50673.59733.59733.14343.1434
H51.09352.16323.42624.50671.77421.77422.50282.5028
H61.09302.17852.76753.59731.77421.77222.53003.0857
H71.09302.17852.76753.59731.77421.77223.08572.5300
H82.17621.09512.08463.14342.50282.53003.08571.7608
H92.17621.09512.08463.14342.50283.08572.53001.7608

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 112.286 C1 C2 H8 110.604
C1 C2 H9 110.604 C2 C1 H5 109.679
C2 C1 H6 110.908 C2 C1 H7 110.908
C2 C3 N4 179.320 C3 C2 H8 108.071
C3 C2 H9 108.071 H5 C1 H6 108.475
H5 C1 H7 108.475 H6 C1 H7 108.324
H8 C2 H9 107.011
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.502      
2 C -0.391      
3 C 0.339      
4 N -0.459      
5 H 0.184      
6 H 0.193      
7 H 0.193      
8 H 0.221      
9 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.254 3.285 0.000 3.984
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.732 -3.737 0.000
y -3.737 -27.177 0.000
z 0.000 0.000 -23.455
Traceless
 xyz
x -1.415 -3.737 0.000
y -3.737 -2.083 0.000
z 0.000 0.000 3.499
Polar
3z2-r26.998
x2-y20.445
xy-3.737
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.160 1.196 0.000
y 1.196 5.747 0.000
z 0.000 0.000 3.977


<r2> (average value of r2) Å2
<r2> 87.989
(<r2>)1/2 9.380