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: CID/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 CID/6-311G*
 hartrees
Energy at 0K-171.506778
Energy at 298.15K 
HF Energy-170.997090
Nuclear repulsion energy103.234378
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 CID/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' 3227 2998 22.15      
2 A' 3165 2940 7.07      
3 A' 3146 2923 18.75      
4 A' 2468 2293 4.68      
5 A' 1576 1464 8.32      
6 A' 1555 1445 4.89      
7 A' 1495 1389 2.90      
8 A' 1425 1324 3.18      
9 A' 1149 1067 4.69      
10 A' 1067 992 1.71      
11 A' 874 812 1.07      
12 A' 574 533 0.91      
13 A' 224 208 4.58      
14 A" 3234 3005 22.53      
15 A" 3205 2978 0.35      
16 A" 1570 1459 9.21      
17 A" 1355 1259 0.00      
18 A" 1175 1092 0.37      
19 A" 822 764 3.38      
20 A" 412 382 0.43      
21 A" 233 216 0.93      

Unscaled Zero Point Vibrational Energy (zpe) 16975.6 cm-1
Scaled (by 0.9291) Zero Point Vibrational Energy (zpe) 15772.0 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 CID/6-311G*
ABC
0.93777 0.15745 0.14187

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/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 0.814 0.000
C3 -0.769 -0.436 0.000
N4 -1.358 -1.419 0.000
H5 2.042 1.510 0.000
H6 1.809 0.000 0.881
H7 1.809 0.000 -0.881
H8 -0.296 1.389 0.875
H9 -0.296 1.389 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52982.48723.48481.08761.08711.08712.16972.1697
C21.52981.46742.61302.15762.17042.17041.08851.0885
C32.48721.46741.14573.41922.75952.75952.07852.0785
N43.48482.61301.14574.48773.58073.58073.12683.1268
H51.08762.15763.41924.48771.76351.76352.49952.4995
H61.08712.17042.75953.58071.76351.76172.52193.0732
H71.08712.17042.75953.58071.76351.76173.07322.5219
H82.16971.08852.07853.12682.49952.52193.07321.7509
H92.16971.08852.07853.12682.49953.07322.52191.7509

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 112.153 C1 C2 H8 110.799
C1 C2 H9 110.799 C2 C1 H5 109.885
C2 C1 H6 110.943 C2 C1 H7 110.943
C2 C3 N4 179.315 C3 C2 H8 107.906
C3 C2 H9 107.906 H5 C1 H6 108.369
H5 C1 H7 108.369 H6 C1 H7 108.249
H8 C2 H9 107.078
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability