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: B2PLYP=FULL/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-171.767184
Energy at 298.15K 
HF Energy-171.630098
Nuclear repulsion energy101.892713
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 B2PLYP=FULL/6-31G
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' 3165 3165 23.02 72.46 0.71 0.83
2 A' 3081 3081 19.98 97.13 0.01 0.02
3 A' 3076 3076 8.52 114.28 0.08 0.15
4 A' 2234 2234 1.34 42.33 0.28 0.44
5 A' 1567 1567 7.76 11.98 0.74 0.85
6 A' 1544 1544 6.60 22.85 0.71 0.83
7 A' 1482 1482 2.44 2.41 0.73 0.85
8 A' 1400 1400 1.71 7.74 0.65 0.79
9 A' 1131 1131 6.87 2.69 0.18 0.31
10 A' 1035 1035 0.56 7.61 0.43 0.61
11 A' 844 844 0.38 6.36 0.19 0.32
12 A' 536 536 1.69 2.07 0.39 0.56
13 A' 207 207 2.97 3.51 0.73 0.85
14 A" 3170 3170 22.85 30.18 0.75 0.86
15 A" 3115 3115 3.14 92.83 0.75 0.86
16 A" 1560 1560 8.49 22.65 0.75 0.86
17 A" 1330 1330 0.00 11.36 0.75 0.86
18 A" 1165 1165 0.69 0.09 0.75 0.86
19 A" 826 826 4.02 0.36 0.75 0.86
20 A" 370 370 0.00 4.01 0.75 0.86
21 A" 220 220 0.75 0.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16527.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16527.8 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 B2PLYP=FULL/6-31G
ABC
0.92435 0.15307 0.13808

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.526 0.575 0.000
C2 0.000 0.818 0.000
C3 -0.774 -0.432 0.000
N4 -1.379 -1.448 0.000
H5 2.053 1.533 0.000
H6 1.831 0.012 0.886
H7 1.831 0.012 -0.886
H8 -0.286 1.407 0.880
H9 -0.286 1.407 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.54552.51103.53991.09381.09341.09342.17992.1799
C21.54551.47072.65272.17402.18862.18861.09641.0964
C32.51101.47071.18203.44322.78772.78772.09602.0960
N43.53992.65271.18204.54603.63643.63643.18053.1805
H51.09382.17403.44324.54601.77451.77452.50272.5027
H61.09342.18862.78773.63641.77451.77272.53593.0902
H71.09342.18862.78773.63641.77451.77273.09022.5359
H82.17991.09642.09603.18052.50272.53593.09021.7592
H92.17991.09642.09603.18052.50273.09022.53591.7592

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 112.689 C1 C2 H8 110.037
C1 C2 H9 110.037 C2 C1 H5 109.732
C2 C1 H6 110.902 C2 C1 H7 110.902
C2 C3 N4 179.034 C3 C2 H8 108.593
C3 C2 H9 108.593 H5 C1 H6 108.455
H5 C1 H7 108.455 H6 C1 H7 108.320
H8 C2 H9 106.696
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability