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

using model chemistry: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-172.064797
Energy at 298.15K 
HF Energy-172.064797
Nuclear repulsion energy103.200766
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 mPW1PW91/6-311G**
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' 3154 3017 17.03 75.66 0.71 0.83
2 A' 3074 2941 14.16 20.49 0.39 0.56
3 A' 3072 2939 9.30 224.72 0.01 0.02
4 A' 2389 2286 10.21 67.29 0.26 0.41
5 A' 1508 1443 7.08 6.85 0.74 0.85
6 A' 1474 1410 6.53 12.14 0.73 0.84
7 A' 1419 1357 2.27 1.75 0.32 0.49
8 A' 1353 1294 2.82 3.27 0.56 0.72
9 A' 1099 1052 4.27 3.32 0.16 0.27
10 A' 1038 993 0.63 4.64 0.46 0.63
11 A' 856 819 0.07 4.74 0.13 0.24
12 A' 559 534 1.00 2.01 0.36 0.53
13 A' 216 206 3.98 2.89 0.73 0.85
14 A" 3158 3022 16.53 28.42 0.75 0.86
15 A" 3112 2977 0.85 94.34 0.75 0.86
16 A" 1500 1435 8.98 11.22 0.75 0.86
17 A" 1293 1237 0.04 4.91 0.75 0.86
18 A" 1115 1067 0.49 0.05 0.75 0.86
19 A" 792 757 4.43 0.40 0.75 0.86
20 A" 402 385 0.19 3.10 0.75 0.86
21 A" 224 214 0.84 0.57 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16401.5 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 15691.3 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 mPW1PW91/6-311G**
ABC
0.94202 0.15737 0.14194

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.563 0.000
C2 0.000 0.807 0.000
C3 -0.767 -0.431 0.000
N4 -1.361 -1.417 0.000
H5 2.040 1.517 0.000
H6 1.814 0.001 0.883
H7 1.814 0.001 -0.883
H8 -0.298 1.387 0.878
H9 -0.298 1.387 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52972.48503.48821.09081.09031.09032.17172.1717
C21.52971.45662.60762.15962.17282.17281.09321.0932
C32.48501.45661.15113.41662.76232.76232.07262.0726
N43.48822.60761.15114.49173.58823.58823.12463.1246
H51.09082.15963.41664.49171.76901.76902.49992.4999
H61.09032.17282.76233.58821.76901.76642.52593.0791
H71.09032.17282.76233.58821.76901.76643.07912.5259
H82.17171.09322.07263.12462.49992.52593.07911.7553
H92.17171.09322.07263.12462.49993.07912.52591.7553

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 112.616 C1 C2 H8 110.687
C1 C2 H9 110.687 C2 C1 H5 109.867
C2 C1 H6 110.944 C2 C1 H7 110.944
C2 C3 N4 179.299 C3 C2 H8 107.906
C3 C2 H9 107.906 H5 C1 H6 108.400
H5 C1 H7 108.400 H6 C1 H7 108.204
H8 C2 H9 106.808
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.334      
2 C -0.244      
3 C 0.090      
4 N -0.283      
5 H 0.135      
6 H 0.145      
7 H 0.145      
8 H 0.174      
9 H 0.174      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.279 3.304 0.000 4.014
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.037 -3.724 0.000
y -3.724 -27.423 0.000
z 0.000 0.000 -23.737
Traceless
 xyz
x -1.456 -3.724 0.000
y -3.724 -2.036 0.000
z 0.000 0.000 3.492
Polar
3z2-r26.984
x2-y20.386
xy-3.724
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.634 1.195 0.000
y 1.195 6.041 0.000
z 0.000 0.000 4.242


<r2> (average value of r2) Å2
<r2> 87.619
(<r2>)1/2 9.361