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

using model chemistry: wB97X-D/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 wB97X-D/6-31G
 hartrees
Energy at 0K-171.956541
Energy at 298.15K 
HF Energy-171.956541
Nuclear repulsion energy102.439506
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 wB97X-D/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' 3172 3172 21.01 75.32 0.71 0.83
2 A' 3083 3083 8.29 102.61 0.09 0.16
3 A' 3079 3079 19.53 113.04 0.01 0.02
4 A' 2352 2352 8.65 50.76 0.30 0.46
5 A' 1555 1555 10.24 13.57 0.74 0.85
6 A' 1532 1532 9.78 20.76 0.71 0.83
7 A' 1477 1477 5.49 2.43 0.70 0.83
8 A' 1396 1396 1.88 7.20 0.64 0.78
9 A' 1132 1132 8.99 2.71 0.19 0.32
10 A' 1051 1051 0.97 7.25 0.43 0.61
11 A' 858 858 0.25 5.81 0.19 0.32
12 A' 556 556 1.89 2.42 0.43 0.60
13 A' 214 214 3.12 3.67 0.73 0.85
14 A" 3176 3176 20.39 27.11 0.75 0.86
15 A" 3129 3129 1.49 99.09 0.75 0.86
16 A" 1550 1550 11.34 23.02 0.75 0.86
17 A" 1325 1325 0.02 10.67 0.75 0.86
18 A" 1161 1161 0.77 0.06 0.75 0.86
19 A" 830 830 5.63 0.49 0.75 0.86
20 A" 388 388 0.00 4.65 0.75 0.86
21 A" 221 221 0.74 0.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16617.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16617.7 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 wB97X-D/6-31G
ABC
0.92932 0.15506 0.13982

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.519 0.566 0.000
C2 0.000 0.814 0.000
C3 -0.771 -0.431 0.000
N4 -1.373 -1.432 0.000
H5 2.050 1.522 0.000
H6 1.823 0.002 0.886
H7 1.823 0.002 -0.886
H8 -0.288 1.401 0.880
H9 -0.288 1.401 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53962.49803.51541.09361.09331.09332.17632.1763
C21.53961.46472.63292.16882.18352.18351.09591.0959
C32.49801.46471.16833.43122.77522.77522.08872.0887
N43.51542.63291.16834.52163.61343.61343.15873.1587
H51.09362.16883.43124.52161.77391.77392.50082.5008
H61.09332.18352.77523.61341.77391.77252.53173.0870
H71.09332.18352.77523.61341.77391.77253.08702.5317
H82.17631.09592.08873.15872.50082.53173.08701.7602
H92.17631.09592.08873.15872.50083.08702.53171.7602

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 112.480 C1 C2 H8 110.200
C1 C2 H9 110.200 C2 C1 H5 109.745
C2 C1 H6 110.924 C2 C1 H7 110.924
C2 C3 N4 179.244 C3 C2 H8 108.462
C3 C2 H9 108.462 H5 C1 H6 108.425
H5 C1 H7 108.425 H6 C1 H7 108.321
H8 C2 H9 106.853
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.465      
2 C -0.362      
3 C 0.133      
4 N -0.284      
5 H 0.175      
6 H 0.184      
7 H 0.184      
8 H 0.217      
9 H 0.217      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.287 3.333 0.000 4.042
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.978 -3.972 0.000
y -3.972 -27.636 0.000
z 0.000 0.000 -23.637
Traceless
 xyz
x -1.341 -3.972 0.000
y -3.972 -2.329 0.000
z 0.000 0.000 3.670
Polar
3z2-r27.340
x2-y20.658
xy-3.972
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.030 1.242 0.000
y 1.242 5.714 0.000
z 0.000 0.000 3.873


<r2> (average value of r2) Å2
<r2> 88.653
(<r2>)1/2 9.416