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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-171.902962
Energy at 298.15K 
HF Energy-171.902962
Nuclear repulsion energy102.582507
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 PBEPBEultrafine/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' 3060 3026 13.38 73.02 0.70 0.82
2 A' 2986 2952 16.99 134.81 0.01 0.02
3 A' 2973 2940 4.61 191.94 0.03 0.07
4 A' 2266 2241 10.15 105.03 0.17 0.29
5 A' 1453 1436 5.82 3.07 0.74 0.85
6 A' 1415 1399 6.29 8.70 0.63 0.78
7 A' 1362 1347 1.57 0.47 0.64 0.78
8 A' 1295 1280 2.49 3.55 0.44 0.61
9 A' 1055 1043 3.36 5.32 0.12 0.22
10 A' 1000 988 0.18 3.61 0.42 0.59
11 A' 827 818 0.09 5.72 0.07 0.13
12 A' 534 528 0.84 1.51 0.13 0.23
13 A' 204 202 3.77 2.05 0.71 0.83
14 A" 3064 3030 12.28 30.07 0.75 0.86
15 A" 3006 2972 0.63 84.15 0.75 0.86
16 A" 1444 1428 7.87 5.08 0.75 0.86
17 A" 1243 1229 0.00 1.95 0.75 0.86
18 A" 1071 1059 0.48 0.19 0.75 0.86
19 A" 762 753 3.76 0.42 0.75 0.86
20 A" 378 374 0.16 1.12 0.75 0.86
21 A" 210 207 0.94 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15803.1 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 15626.1 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
0.93233 0.15559 0.14036

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.518 0.567 0.000
C2 0.000 0.809 0.000
C3 -0.770 -0.431 0.000
N4 -1.369 -1.428 0.000
H5 2.048 1.528 0.000
H6 1.825 0.001 0.888
H7 1.825 0.001 -0.888
H8 -0.298 1.396 0.882
H9 -0.298 1.396 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53712.49623.50931.09741.09691.09692.18292.1829
C21.53711.45962.62272.17032.18442.18441.10091.1009
C32.49621.45961.16313.43192.77682.77682.08262.0826
N43.50932.62271.16314.51813.61033.61033.14613.1461
H51.09742.17033.43194.51811.78021.78022.51032.5103
H61.09692.18442.77683.61031.78021.77672.54023.0965
H71.09692.18442.77683.61031.78021.77673.09652.5402
H82.18291.10092.08263.14612.51032.54023.09651.7649
H92.18291.10092.08263.14612.51033.09652.54021.7649

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 112.789 C1 C2 H8 110.591
C1 C2 H9 110.591 C2 C1 H5 109.813
C2 C1 H6 110.950 C2 C1 H7 110.950
C2 C3 N4 179.147 C3 C2 H8 108.033
C3 C2 H9 108.033 H5 C1 H6 108.442
H5 C1 H7 108.442 H6 C1 H7 108.165
H8 C2 H9 106.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.630      
2 C -0.041      
3 C 0.156      
4 N -0.456      
5 H 0.206      
6 H 0.202      
7 H 0.202      
8 H 0.181      
9 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.341 3.376 0.000 4.108
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.532 -3.816 0.000
y -3.816 -27.984 0.000
z 0.000 0.000 -24.167
Traceless
 xyz
x -1.457 -3.816 0.000
y -3.816 -2.134 0.000
z 0.000 0.000 3.591
Polar
3z2-r27.182
x2-y20.451
xy-3.816
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.995 1.272 0.000
y 1.272 7.180 0.000
z 0.000 0.000 5.322


<r2> (average value of r2) Å2
<r2> 88.736
(<r2>)1/2 9.420