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

using model chemistry: B2PLYP=FULLultrafine/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=FULLultrafine/3-21G
 hartrees
Energy at 0K-170.882301
Energy at 298.15K 
HF Energy-170.746719
Nuclear repulsion energy102.255114
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/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 16.37 62.96 0.72 0.84
2 A' 3093 3093 15.27 16.28 0.20 0.33
3 A' 3092 3092 3.60 162.78 0.04 0.09
4 A' 2273 2273 0.13 33.60 0.29 0.45
5 A' 1589 1589 7.02 14.55 0.74 0.85
6 A' 1558 1558 7.75 20.68 0.71 0.83
7 A' 1486 1486 4.04 2.59 0.75 0.86
8 A' 1400 1400 1.17 8.24 0.68 0.81
9 A' 1138 1138 7.65 1.91 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 15.56 22.43 0.75 0.86
15 A" 3127 3127 0.83 88.55 0.75 0.86
16 A" 1585 1585 8.39 23.37 0.75 0.86
17 A" 1358 1358 0.00 11.03 0.75 0.86
18 A" 1178 1178 0.88 0.21 0.75 0.86
19 A" 830 830 4.80 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) 16697.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16697.8 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=FULLultrafine/3-21G
ABC
0.91456 0.15514 0.13958

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/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
C11.55222.49893.51611.09251.09171.09172.18292.1829
C21.55221.46532.63722.17692.18682.18681.09471.0947
C32.49891.46531.17203.43122.76512.76512.09262.0926
N43.51612.63721.17204.52233.60163.60163.16683.1668
H51.09252.17693.43124.52231.77621.77622.50582.5058
H61.09172.18682.76513.60161.77621.77512.52853.0867
H71.09172.18682.76513.60161.77621.77513.08672.5285
H82.18291.09472.09263.16682.50582.52853.08671.7660
H92.18291.09472.09263.16682.50583.08672.52851.7660

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 111.786 C1 C2 H8 109.914
C1 C2 H9 109.914 C2 C1 H5 109.571
C2 C1 H6 110.399 C2 C1 H7 110.399
C2 C3 N4 179.324 C3 C2 H8 108.795
C3 C2 H9 108.795 H5 C1 H6 108.827
H5 C1 H7 108.827 H6 C1 H7 108.781
H8 C2 H9 107.529
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/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 2.980 0.000 3.643
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.048 -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 5.231 0.000
z 0.000 0.000 3.620


<r2> (average value of r2) Å2
<r2> 88.808
(<r2>)1/2 9.424