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

using model chemistry: B2PLYP=FULLultrafine/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=FULLultrafine/6-31G**
 hartrees
Energy at 0K-171.895800
Energy at 298.15K 
HF Energy-171.698325
Nuclear repulsion energy102.598336
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=FULLultrafine/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' 3186 3186 17.88 70.44 0.72 0.84
2 A' 3102 3102 17.59 11.23 0.44 0.61
3 A' 3100 3100 6.31 196.57 0.03 0.06
4 A' 2309 2309 1.78 48.36 0.29 0.44
5 A' 1543 1543 4.50 10.13 0.74 0.85
6 A' 1510 1510 3.90 18.09 0.72 0.84
7 A' 1452 1452 0.76 2.43 0.67 0.80
8 A' 1377 1377 3.65 5.14 0.61 0.75
9 A' 1113 1113 4.01 3.23 0.15 0.27
10 A' 1035 1035 0.43 5.62 0.49 0.66
11 A' 852 852 0.23 5.15 0.18 0.30
12 A' 545 545 0.89 1.78 0.40 0.58
13 A' 212 212 4.11 2.84 0.73 0.84
14 A" 3192 3192 17.43 29.36 0.75 0.86
15 A" 3144 3144 2.03 88.88 0.75 0.86
16 A" 1536 1536 6.10 18.44 0.75 0.86
17 A" 1311 1311 0.00 8.07 0.75 0.86
18 A" 1134 1134 0.30 0.19 0.75 0.86
19 A" 802 802 3.41 0.32 0.75 0.86
20 A" 392 392 0.37 3.29 0.75 0.86
21 A" 230 230 1.07 0.65 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16537.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16537.4 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=FULLultrafine/6-31G**
ABC
0.93423 0.15537 0.14013

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.515 0.572 0.000
C2 0.000 0.815 0.000
C3 -0.768 -0.434 0.000
N4 -1.367 -1.436 0.000
H5 2.042 1.525 0.000
H6 1.817 0.010 0.883
H7 1.817 0.010 -0.883
H8 -0.295 1.395 0.878
H9 -0.295 1.395 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53422.49393.51191.09021.08961.08962.17352.1735
C21.53421.46632.63362.16242.17532.17531.09241.0924
C32.49391.46631.16743.42572.76742.76742.08282.0828
N43.51192.63361.16744.51593.60693.60693.15143.1514
H51.09022.16243.42574.51591.76871.76872.50052.5005
H61.08962.17532.76743.60691.76871.76612.52643.0794
H71.08962.17532.76743.60691.76871.76613.07942.5264
H82.17351.09242.08283.15142.50052.52643.07941.7551
H92.17351.09242.08283.15142.50053.07942.52641.7551

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 112.421 C1 C2 H8 110.565
C1 C2 H9 110.565 C2 C1 H5 109.813
C2 C1 H6 110.869 C2 C1 H7 110.869
C2 C3 N4 179.340 C3 C2 H8 108.094
C3 C2 H9 108.094 H5 C1 H6 108.466
H5 C1 H7 108.466 H6 C1 H7 108.283
H8 C2 H9 106.898
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.324      
2 C -0.260      
3 C 0.299      
4 N -0.427      
5 H 0.123      
6 H 0.135      
7 H 0.135      
8 H 0.160      
9 H 0.160      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.189 3.191 0.000 3.870
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.910 -3.711 -0.008
y -3.711 -27.471 -0.007
z -0.008 -0.007 -23.702
Traceless
 xyz
x -1.324 -3.711 -0.008
y -3.711 -2.165 -0.007
z -0.008 -0.007 3.488
Polar
3z2-r26.977
x2-y20.561
xy-3.711
xz-0.008
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.179 1.193 0.000
y 1.193 5.734 0.000
z 0.000 0.000 3.975


<r2> (average value of r2) Å2
<r2> 88.417
(<r2>)1/2 9.403