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

using model chemistry: HSEh1PBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at HSEh1PBE/6-311G*
 hartrees
Energy at 0K-171.907455
Energy at 298.15K 
HF Energy-171.907455
Nuclear repulsion energy103.182566
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 HSEh1PBE/6-311G*
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' 3151 3023 20.68 77.69 0.71 0.83
2 A' 3073 2949 15.62 30.94 0.28 0.43
3 A' 3071 2947 12.30 204.30 0.01 0.02
4 A' 2387 2291 9.72 67.53 0.26 0.41
5 A' 1520 1458 8.35 7.30 0.74 0.85
6 A' 1484 1424 6.94 13.13 0.73 0.84
7 A' 1426 1369 3.22 2.19 0.32 0.48
8 A' 1360 1305 2.78 3.91 0.58 0.73
9 A' 1104 1059 4.75 3.34 0.16 0.28
10 A' 1040 998 0.79 4.56 0.49 0.66
11 A' 858 823 0.09 4.53 0.14 0.25
12 A' 560 538 1.01 2.08 0.35 0.52
13 A' 216 207 3.98 2.86 0.73 0.85
14 A" 3156 3029 20.52 28.96 0.75 0.86
15 A" 3109 2984 1.37 97.87 0.75 0.86
16 A" 1513 1452 10.29 12.41 0.75 0.86
17 A" 1303 1250 0.08 5.47 0.75 0.86
18 A" 1122 1077 0.34 0.05 0.75 0.86
19 A" 793 761 4.62 0.41 0.75 0.86
20 A" 403 387 0.17 3.08 0.75 0.86
21 A" 227 217 0.84 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16436.9 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 15772.8 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 HSEh1PBE/6-311G*
ABC
0.94002 0.15750 0.14200

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.562 0.000
C2 0.000 0.807 0.000
C3 -0.767 -0.431 0.000
N4 -1.361 -1.418 0.000
H5 2.042 1.514 0.000
H6 1.815 -0.002 0.883
H7 1.815 -0.002 -0.883
H8 -0.297 1.391 0.877
H9 -0.297 1.391 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52852.48273.48591.09201.09131.09132.17152.1715
C21.52851.45642.60812.16132.17442.17441.09441.0944
C32.48271.45641.15183.41712.76242.76242.07562.0756
N43.48592.60811.15184.49213.58763.58763.12873.1287
H51.09202.16133.41714.49211.76911.76912.50122.5012
H61.09132.17442.76243.58761.76911.76652.52913.0815
H71.09132.17442.76243.58761.76911.76653.08152.5291
H82.17151.09442.07563.12872.50122.52913.08151.7544
H92.17151.09442.07563.12872.50123.08152.52911.7544

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 112.536 C1 C2 H8 110.680
C1 C2 H9 110.680 C2 C1 H5 110.018
C2 C1 H6 111.093 C2 C1 H7 111.093
C2 C3 N4 179.249 C3 C2 H8 108.082
C3 C2 H9 108.082 H5 C1 H6 108.240
H5 C1 H7 108.240 H6 C1 H7 108.055
H8 C2 H9 106.548
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.661      
2 C -0.495      
3 C 0.151      
4 N -0.272      
5 H 0.239      
6 H 0.247      
7 H 0.247      
8 H 0.272      
9 H 0.272      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.249 3.289 0.000 3.984
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.207 -3.701 0.000
y -3.701 -27.505 0.000
z 0.000 0.000 -23.819
Traceless
 xyz
x -1.545 -3.701 0.000
y -3.701 -1.992 0.000
z 0.000 0.000 3.538
Polar
3z2-r27.075
x2-y20.298
xy-3.701
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.567 1.183 0.000
y 1.183 6.004 0.000
z 0.000 0.000 4.206


<r2> (average value of r2) Å2
<r2> 87.679
(<r2>)1/2 9.364