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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-172.058131
Energy at 298.15K 
HF Energy-172.058131
Nuclear repulsion energy103.202505
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' 3155 3011 21.29 76.06 0.71 0.83
2 A' 3078 2938 13.96 46.09 0.19 0.31
3 A' 3076 2936 14.66 185.36 0.01 0.02
4 A' 2390 2281 9.72 66.86 0.26 0.41
5 A' 1525 1456 8.14 7.28 0.74 0.85
6 A' 1490 1422 6.79 12.99 0.73 0.84
7 A' 1432 1366 2.94 2.14 0.31 0.48
8 A' 1364 1302 2.83 3.94 0.58 0.73
9 A' 1106 1056 4.77 3.22 0.16 0.28
10 A' 1040 992 0.77 4.76 0.48 0.65
11 A' 857 818 0.11 4.60 0.14 0.25
12 A' 560 535 1.01 2.08 0.35 0.52
13 A' 216 206 4.03 2.89 0.73 0.85
14 A" 3161 3017 21.22 28.18 0.75 0.86
15 A" 3115 2973 1.45 96.25 0.75 0.86
16 A" 1519 1449 10.04 12.36 0.75 0.86
17 A" 1307 1247 0.07 5.57 0.75 0.86
18 A" 1126 1074 0.35 0.04 0.75 0.86
19 A" 795 759 4.57 0.40 0.75 0.86
20 A" 403 384 0.19 3.12 0.75 0.86
21 A" 226 216 0.84 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16471.0 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 15719.9 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
0.94149 0.15742 0.14195

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 1.509 0.562 0.000
C2 0.000 0.807 0.000
C3 -0.767 -0.431 0.000
N4 -1.361 -1.417 0.000
H5 2.041 1.515 0.000
H6 1.816 0.000 0.882
H7 1.816 0.000 -0.882
H8 -0.297 1.389 0.876
H9 -0.297 1.389 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52892.48403.48711.09091.09021.09022.17082.1708
C21.52891.45692.60792.16022.17392.17391.09321.0932
C32.48401.45691.15113.41682.76352.76352.07482.0748
N43.48712.60791.15114.49163.58913.58913.12723.1272
H51.09092.16023.41684.49161.76731.76732.49952.4995
H61.09022.17392.76353.58911.76731.76492.52793.0796
H71.09022.17392.76353.58911.76731.76493.07962.5279
H82.17081.09322.07483.12722.49952.52793.07961.7528
H92.17081.09322.07483.12722.49953.07962.52791.7528

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 112.580 C1 C2 H8 110.668
C1 C2 H9 110.668 C2 C1 H5 109.969
C2 C1 H6 111.096 C2 C1 H7 111.096
C2 C3 N4 179.282 C3 C2 H8 108.054
C3 C2 H9 108.054 H5 C1 H6 108.248
H5 C1 H7 108.248 H6 C1 H7 108.085
H8 C2 H9 106.582
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 -0.655      
2 C -0.490      
3 C 0.160      
4 N -0.284      
5 H 0.238      
6 H 0.245      
7 H 0.245      
8 H 0.270      
9 H 0.270      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.258 3.297 0.000 3.996
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.150 -3.715 0.000
y -3.715 -27.453 0.000
z 0.000 0.000 -23.752
Traceless
 xyz
x -1.547 -3.715 0.000
y -3.715 -2.002 0.000
z 0.000 0.000 3.549
Polar
3z2-r27.099
x2-y20.303
xy-3.715
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.547 1.182 0.000
y 1.182 5.983 0.000
z 0.000 0.000 4.188


<r2> (average value of r2) Å2
<r2> 87.653
(<r2>)1/2 9.362