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

using model chemistry: B2PLYP/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/6-31G
 hartrees
Energy at 0K-171.765666
Energy at 298.15K 
HF Energy-171.630093
Nuclear repulsion energy101.891090
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/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' 3164 3164 23.05 72.43 0.71 0.83
2 A' 3081 3081 19.99 97.26 0.01 0.02
3 A' 3076 3076 8.54 114.26 0.08 0.15
4 A' 2234 2234 1.34 42.30 0.28 0.44
5 A' 1567 1567 7.76 11.95 0.74 0.85
6 A' 1544 1544 6.58 22.88 0.71 0.83
7 A' 1482 1482 2.43 2.41 0.73 0.85
8 A' 1400 1400 1.71 7.74 0.65 0.79
9 A' 1131 1131 6.89 2.69 0.18 0.31
10 A' 1035 1035 0.56 7.62 0.43 0.61
11 A' 844 844 0.38 6.35 0.19 0.32
12 A' 536 536 1.67 2.07 0.39 0.56
13 A' 206 206 2.98 3.51 0.73 0.85
14 A" 3169 3169 22.88 30.10 0.75 0.86
15 A" 3115 3115 3.14 92.94 0.75 0.86
16 A" 1560 1560 8.48 22.64 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 4.00 0.75 0.86
21 A" 220 220 0.75 0.91 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16527.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16527.1 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/6-31G
ABC
0.92313 0.15313 0.13811

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.526 0.574 0.000
C2 0.000 0.819 0.000
C3 -0.775 -0.431 0.000
N4 -1.379 -1.448 0.000
H5 2.054 1.532 0.000
H6 1.831 0.011 0.886
H7 1.831 0.011 -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
C11.54562.51103.53891.09381.09341.09342.18002.1800
C21.54561.47082.65282.17422.18872.18871.09641.0964
C32.51101.47081.18213.44332.78762.78762.09622.0962
N43.53892.65281.18214.54533.63493.63493.18113.1811
H51.09382.17423.44334.54531.77471.77472.50292.5029
H61.09342.18872.78763.63491.77471.77282.53613.0904
H71.09342.18872.78763.63491.77471.77283.09042.5361
H82.18001.09642.09623.18112.50292.53613.09041.7593
H92.18001.09642.09623.18112.50293.09042.53611.7593

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 112.673 C1 C2 H8 110.039
C1 C2 H9 110.039 C2 C1 H5 109.731
C2 C1 H6 110.898 C2 C1 H7 110.898
C2 C3 N4 178.923 C3 C2 H8 108.599
C3 C2 H9 108.599 H5 C1 H6 108.459
H5 C1 H7 108.459 H6 C1 H7 108.322
H8 C2 H9 106.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.405      
2 C -0.312      
3 C 0.121      
4 N -0.267      
5 H 0.153      
6 H 0.162      
7 H 0.162      
8 H 0.192      
9 H 0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.218 3.245 0.000 3.931
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.327 -3.967 -0.009
y -3.967 -28.094 -0.007
z -0.009 -0.007 -23.992
Traceless
 xyz
x -1.284 -3.967 -0.009
y -3.967 -2.434 -0.007
z -0.009 -0.007 3.719
Polar
3z2-r27.438
x2-y20.767
xy-3.967
xz-0.009
yz-0.007


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.018 1.223 0.000
y 1.223 5.682 0.000
z 0.000 0.000 3.865


<r2> (average value of r2) Å2
<r2> 89.712
(<r2>)1/2 9.472