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

using model chemistry: PBEPBE/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at PBEPBE/Def2TZVPP
 hartrees
Energy at 0K-171.906513
Energy at 298.15K 
HF Energy-171.906513
Nuclear repulsion energy102.576073
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 PBEPBE/Def2TZVPP
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' 3066 3029 13.64 73.83 0.70 0.82
2 A' 2989 2953 17.02 115.58 0.01 0.02
3 A' 2976 2940 4.68 176.29 0.04 0.07
4 A' 2270 2243 8.62 85.99 0.22 0.36
5 A' 1455 1437 6.07 4.85 0.74 0.85
6 A' 1417 1400 6.36 10.59 0.66 0.80
7 A' 1365 1348 1.63 0.75 0.45 0.62
8 A' 1296 1281 2.36 3.59 0.52 0.69
9 A' 1057 1044 3.48 3.99 0.12 0.21
10 A' 1002 990 0.21 3.98 0.43 0.60
11 A' 829 819 0.09 5.34 0.09 0.17
12 A' 537 530 0.87 1.71 0.20 0.34
13 A' 205 203 3.53 2.50 0.74 0.85
14 A" 3069 3032 12.76 31.04 0.75 0.86
15 A" 3010 2974 0.80 86.65 0.75 0.86
16 A" 1446 1429 7.91 8.01 0.75 0.86
17 A" 1244 1229 0.02 3.43 0.75 0.86
18 A" 1072 1059 0.45 0.14 0.75 0.86
19 A" 764 755 3.85 0.31 0.75 0.86
20 A" 382 378 0.09 1.83 0.75 0.86
21 A" 213 210 0.89 0.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15832.8 cm-1
Scaled (by 0.9879) Zero Point Vibrational Energy (zpe) 15641.2 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 PBEPBE/Def2TZVPP
ABC
0.93220 0.15558 0.14034

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/Def2TZVPP

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 -0.299 1.396 0.882
H9 -0.299 1.396 -0.882

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53702.49623.50941.09741.09691.09692.18302.1830
C21.53701.45992.62312.17072.18432.18431.10101.1010
C32.49621.45991.16323.43222.77662.77662.08312.0831
N43.50942.62311.16324.51853.61033.61033.14663.1466
H51.09742.17073.43224.51851.78011.78012.51082.5108
H61.09692.18432.77663.61031.78011.77652.54053.0967
H71.09692.18432.77663.61031.78011.77653.09672.5405
H82.18301.10102.08313.14662.51082.54053.09671.7647
H92.18301.10102.08313.14662.51083.09672.54051.7647

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 112.776 C1 C2 H8 110.601
C1 C2 H9 110.601 C2 C1 H5 109.845
C2 C1 H6 110.952 C2 C1 H7 110.952
C2 C3 N4 179.162 C3 C2 H8 108.048
C3 C2 H9 108.048 H5 C1 H6 108.431
H5 C1 H7 108.431 H6 C1 H7 108.147
H8 C2 H9 106.523
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.243      
2 C 0.012      
3 C -0.304      
4 N 0.043      
5 H 0.089      
6 H 0.100      
7 H 0.100      
8 H 0.102      
9 H 0.102      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.311 3.331 0.000 4.054
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.413 -3.752 0.000
y -3.752 -27.820 0.000
z 0.000 0.000 -24.097
Traceless
 xyz
x -1.454 -3.752 0.000
y -3.752 -2.065 0.000
z 0.000 0.000 3.519
Polar
3z2-r27.038
x2-y20.407
xy-3.752
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.531 1.303 0.000
y 1.303 6.822 0.000
z 0.000 0.000 4.925


<r2> (average value of r2) Å2
<r2> 88.671
(<r2>)1/2 9.417