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

using model chemistry: wB97X-D/3-21G

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/3-21G
 hartrees
Energy at 0K-171.069538
Energy at 298.15K 
HF Energy-171.069538
Nuclear repulsion energy102.722260
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/3-21G
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 3174 12.59 66.42 0.71 0.83
2 A' 3101 3101 3.96 81.57 0.11 0.20
3 A' 3095 3095 11.81 101.27 0.01 0.03
4 A' 2389 2389 3.39 40.10 0.30 0.46
5 A' 1571 1571 10.15 15.82 0.74 0.85
6 A' 1541 1541 12.05 19.26 0.71 0.83
7 A' 1478 1478 9.44 2.55 0.74 0.85
8 A' 1395 1395 2.35 7.76 0.67 0.80
9 A' 1137 1137 10.66 1.92 0.16 0.27
10 A' 1026 1026 0.56 7.17 0.42 0.59
11 A' 856 856 0.02 5.39 0.20 0.34
12 A' 604 604 2.13 2.17 0.39 0.56
13 A' 245 245 2.47 2.56 0.72 0.84
14 A" 3180 3180 10.97 19.63 0.75 0.86
15 A" 3142 3142 0.06 95.57 0.75 0.86
16 A" 1568 1568 11.91 23.91 0.75 0.86
17 A" 1351 1351 0.06 10.31 0.75 0.86
18 A" 1171 1171 1.08 0.21 0.75 0.86
19 A" 833 833 7.29 0.64 0.75 0.86
20 A" 460 460 0.10 3.70 0.75 0.86
21 A" 227 227 0.51 0.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16770.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16770.3 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 wB97X-D/3-21G
ABC
0.91677 0.15704 0.14119

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.521 0.541 0.000
C2 0.000 0.819 0.000
C3 -0.772 -0.419 0.000
N4 -1.374 -1.412 0.000
H5 2.066 1.489 0.000
H6 1.805 -0.029 0.889
H7 1.805 -0.029 -0.889
H8 -0.275 1.404 0.884
H9 -0.275 1.404 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.54652.48673.49261.09341.09291.09292.18022.1802
C21.54651.45942.61992.17242.18312.18311.09551.0955
C32.48671.45941.16063.42062.75432.75432.08702.0870
N43.49262.61991.16064.50033.57943.57943.14973.1497
H51.09342.17243.42064.50031.77771.77772.50412.5041
H61.09292.18312.75433.57941.77771.77712.52563.0857
H71.09292.18312.75433.57941.77771.77713.08572.5256
H82.18021.09552.08703.14972.50412.52563.08571.7687
H92.18021.09552.08703.14972.50413.08572.52561.7687

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 111.608 C1 C2 H8 110.041
C1 C2 H9 110.041 C2 C1 H5 109.557
C2 C1 H6 110.429 C2 C1 H7 110.429
C2 C3 N4 179.289 C3 C2 H8 108.700
C3 C2 H9 108.700 H5 C1 H6 108.803
H5 C1 H7 108.803 H6 C1 H7 108.781
H8 C2 H9 107.649
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.601      
2 C -0.510      
3 C 0.348      
4 N -0.481      
5 H 0.226      
6 H 0.235      
7 H 0.235      
8 H 0.274      
9 H 0.274      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.178 3.094 0.000 3.784
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.777 -3.639 0.000
y -3.639 -27.194 0.000
z 0.000 0.000 -23.609
Traceless
 xyz
x -1.376 -3.639 0.000
y -3.639 -2.000 0.000
z 0.000 0.000 3.376
Polar
3z2-r26.752
x2-y20.416
xy-3.639
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.724 1.117 0.000
y 1.117 5.261 0.000
z 0.000 0.000 3.627


<r2> (average value of r2) Å2
<r2> 87.868
(<r2>)1/2 9.374