return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/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 HF/6-311G*
 hartrees
Energy at 0K-170.997870
Energy at 298.15K 
HF Energy-170.997870
Nuclear repulsion energy103.606970
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 HF/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3268 2955 40.76 77.15 0.68 0.81
2 A' 3224 2916 9.07 125.68 0.10 0.18
3 A' 3200 2894 29.43 106.19 0.02 0.03
4 A' 2595 2347 13.73 55.35 0.24 0.38
5 A' 1636 1480 5.63 5.45 0.74 0.85
6 A' 1613 1459 4.00 14.74 0.75 0.86
7 A' 1554 1405 0.86 1.89 0.17 0.28
8 A' 1483 1341 4.83 2.49 0.50 0.67
9 A' 1192 1078 4.33 3.40 0.18 0.31
10 A' 1075 973 1.85 8.10 0.45 0.62
11 A' 883 799 3.35 5.94 0.16 0.28
12 A' 602 544 1.01 2.58 0.39 0.56
13 A' 237 214 5.65 3.04 0.73 0.84
14 A" 3279 2966 42.58 5.54 0.75 0.86
15 A" 3254 2943 0.10 124.49 0.75 0.86
16 A" 1630 1474 7.34 12.79 0.75 0.86
17 A" 1408 1273 0.03 5.82 0.75 0.86
18 A" 1223 1106 0.26 0.01 0.75 0.86
19 A" 853 771 2.53 0.43 0.75 0.86
20 A" 439 397 0.97 4.15 0.75 0.86
21 A" 241 218 1.13 0.60 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17443.7 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 15776.1 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 HF/6-311G*
ABC
0.94465 0.15802 0.14242

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.560 0.000
C2 0.000 0.811 0.000
C3 -0.773 -0.441 0.000
N4 -1.357 -1.407 0.000
H5 2.039 1.506 0.000
H6 1.812 0.001 0.877
H7 1.812 0.001 -0.877
H8 -0.295 1.382 0.872
H9 -0.295 1.382 -0.872

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53082.49243.47701.08341.08281.08282.16692.1669
C21.53081.47092.60032.15392.16992.16991.08331.0833
C32.49241.47091.12953.41942.76512.76512.07652.0765
N43.47702.60031.12954.47393.57733.57733.10973.1097
H51.08342.15393.41944.47391.75591.75592.49442.4944
H61.08282.16992.76513.57731.75591.75432.51953.0669
H71.08282.16992.76513.57731.75591.75433.06692.5195
H82.16691.08332.07653.10972.49442.51953.06691.7430
H92.16691.08332.07653.10972.49443.06692.51951.7430

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 112.251 C1 C2 H8 110.814
C1 C2 H9 110.814 C2 C1 H5 109.772
C2 C1 H6 111.081 C2 C1 H7 111.081
C2 C3 N4 179.464 C3 C2 H8 107.812
C3 C2 H9 107.812 H5 C1 H6 108.304
H5 C1 H7 108.304 H6 C1 H7 108.207
H8 C2 H9 107.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.608      
2 C -0.430      
3 C 0.170      
4 N -0.341      
5 H 0.226      
6 H 0.231      
7 H 0.231      
8 H 0.261      
9 H 0.261      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.357 3.454 0.000 4.181
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.704 -3.937 0.000
y -3.937 -28.020 0.000
z 0.000 0.000 -24.056
Traceless
 xyz
x -1.666 -3.937 0.000
y -3.937 -2.140 0.000
z 0.000 0.000 3.806
Polar
3z2-r27.612
x2-y20.316
xy-3.937
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.204 1.058 0.000
y 1.058 5.657 0.000
z 0.000 0.000 4.047


<r2> (average value of r2) Å2
<r2> 87.664
(<r2>)1/2 9.363