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/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-171.894411
Energy at 298.15K 
HF Energy-171.700762
Nuclear repulsion energy102.288777
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/cc-pVDZ
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' 3166 3034 16.17 78.93 0.72 0.83
2 A' 3082 2954 6.98 131.91 0.07 0.12
3 A' 3077 2950 17.99 110.43 0.01 0.02
4 A' 2294 2199 1.74 51.69 0.26 0.41
5 A' 1496 1434 4.77 7.93 0.74 0.85
6 A' 1464 1404 4.10 15.23 0.72 0.84
7 A' 1413 1354 0.45 1.57 0.49 0.66
8 A' 1351 1295 4.67 3.15 0.52 0.68
9 A' 1098 1052 3.03 4.22 0.15 0.26
10 A' 1037 994 0.62 4.81 0.52 0.69
11 A' 851 816 0.24 5.32 0.14 0.24
12 A' 541 518 0.81 1.50 0.34 0.50
13 A' 211 202 3.31 2.53 0.73 0.84
14 A" 3170 3038 15.25 31.27 0.75 0.86
15 A" 3125 2996 1.50 100.49 0.75 0.86
16 A" 1487 1425 6.59 14.53 0.75 0.86
17 A" 1289 1236 0.00 5.11 0.75 0.86
18 A" 1111 1065 0.59 0.15 0.75 0.86
19 A" 791 759 3.24 0.36 0.75 0.86
20 A" 390 374 0.10 2.48 0.75 0.86
21 A" 228 219 0.77 0.53 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16335.8 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 15657.9 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/cc-pVDZ
ABC
0.92697 0.15477 0.13960

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.516 0.574 0.000
C2 0.000 0.817 0.000
C3 -0.769 -0.435 0.000
N4 -1.367 -1.441 0.000
H5 2.047 1.536 0.000
H6 1.822 0.007 0.890
H7 1.822 0.007 -0.890
H8 -0.301 1.400 0.884
H9 -0.301 1.400 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53482.49793.51701.09921.09911.09912.18232.1823
C21.53481.46942.63912.17012.18362.18361.10121.1012
C32.49791.46941.16973.43812.77572.77572.09062.0906
N43.51702.63911.16974.52993.61393.61393.16083.1608
H51.09922.17013.43814.52991.78351.78352.51262.5126
H61.09912.18362.77573.61391.78351.78052.53903.0976
H71.09912.18362.77573.61391.78351.78053.09762.5390
H82.18231.10122.09063.16082.51262.53903.09761.7682
H92.18231.10122.09063.16082.51263.09762.53901.7682

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 112.483 C1 C2 H8 110.690
C1 C2 H9 110.690 C2 C1 H5 109.848
C2 C1 H6 110.916 C2 C1 H7 110.916
C2 C3 N4 179.149 C3 C2 H8 107.973
C3 C2 H9 107.973 H5 C1 H6 108.447
H5 C1 H7 108.447 H6 C1 H7 108.187
H8 C2 H9 106.810
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability