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

using model chemistry: B2PLYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-170.880326
Energy at 298.15K 
HF Energy-170.746713
Nuclear repulsion energy102.250467
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/3-21G*
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' 3164 3164 16.40 62.97 0.72 0.84
2 A' 3093 3093 15.23 15.50 0.22 0.36
3 A' 3092 3092 3.67 163.59 0.04 0.08
4 A' 2273 2273 0.13 33.59 0.29 0.45
5 A' 1589 1589 7.01 14.55 0.74 0.85
6 A' 1558 1558 7.74 20.68 0.71 0.83
7 A' 1486 1486 4.03 2.59 0.75 0.86
8 A' 1400 1400 1.17 8.24 0.68 0.81
9 A' 1138 1138 7.65 1.92 0.17 0.28
10 A' 1005 1005 0.36 7.29 0.42 0.60
11 A' 839 839 0.11 5.77 0.20 0.33
12 A' 587 587 1.89 2.02 0.36 0.53
13 A' 241 241 2.34 2.47 0.72 0.84
14 A" 3172 3172 15.59 22.41 0.75 0.86
15 A" 3127 3127 0.84 88.60 0.75 0.86
16 A" 1585 1585 8.38 23.37 0.75 0.86
17 A" 1358 1358 0.00 11.03 0.75 0.86
18 A" 1178 1178 0.88 0.22 0.75 0.86
19 A" 830 830 4.79 0.50 0.75 0.86
20 A" 448 448 0.06 3.45 0.75 0.86
21 A" 232 232 0.50 0.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16697.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16697.3 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/3-21G*
ABC
0.91447 0.15513 0.13957

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.528 0.549 0.000
C2 0.000 0.822 0.000
C3 -0.774 -0.422 0.000
N4 -1.382 -1.425 0.000
H5 2.069 1.499 0.000
H6 1.813 -0.019 0.888
H7 1.813 -0.019 -0.888
H8 -0.274 1.408 0.883
H9 -0.274 1.408 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55232.49903.51621.09251.09171.09172.18302.1830
C21.55231.46532.63732.17692.18692.18691.09471.0947
C32.49901.46531.17203.43132.76532.76532.09272.0927
N43.51622.63731.17204.52253.60183.60183.16693.1669
H51.09252.17693.43134.52251.77631.77632.50582.5058
H61.09172.18692.76533.60181.77631.77522.52863.0869
H71.09172.18692.76533.60181.77631.77523.08692.5286
H82.18301.09472.09273.16692.50582.52863.08691.7661
H92.18301.09472.09273.16692.50583.08692.52861.7661

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 111.787 C1 C2 H8 109.915
C1 C2 H9 109.915 C2 C1 H5 109.568
C2 C1 H6 110.398 C2 C1 H7 110.398
C2 C3 N4 179.321 C3 C2 H8 108.793
C3 C2 H9 108.793 H5 C1 H6 108.828
H5 C1 H7 108.828 H6 C1 H7 108.783
H8 C2 H9 107.531
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.537      
2 C -0.459      
3 C 0.332      
4 N -0.461      
5 H 0.203      
6 H 0.212      
7 H 0.212      
8 H 0.249      
9 H 0.249      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.095 2.981 0.000 3.643
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.049 -3.591 -0.009
y -3.591 -27.549 -0.007
z -0.009 -0.007 -23.930
Traceless
 xyz
x -1.309 -3.591 -0.009
y -3.591 -2.060 -0.007
z -0.009 -0.007 3.369
Polar
3z2-r26.738
x2-y20.501
xy-3.591
xz-0.009
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.720 1.105 0.000
y 1.105 5.232 0.000
z 0.000 0.000 3.621


<r2> (average value of r2) Å2
<r2> 88.815
(<r2>)1/2 9.424