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

using model chemistry: B97D3/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B97D3/3-21G*
 hartrees
Energy at 0K-171.016679
Energy at 298.15K 
HF Energy-171.016679
Nuclear repulsion energy102.046962
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 B97D3/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3090 3090 20.28 68.71 0.72 0.84
2 A' 3015 3015 19.46 78.82 0.02 0.03
3 A' 3007 3007 6.14 116.33 0.08 0.14
4 A' 2265 2265 2.63 46.54 0.30 0.46
5 A' 1541 1541 7.10 14.89 0.74 0.85
6 A' 1504 1504 8.41 20.67 0.69 0.82
7 A' 1435 1435 4.04 2.62 0.75 0.86
8 A' 1347 1347 1.05 9.82 0.68 0.81
9 A' 1100 1100 7.91 1.74 0.14 0.25
10 A' 978 978 0.13 6.37 0.39 0.56
11 A' 825 825 0.01 5.36 0.20 0.33
12 A' 584 584 2.02 2.09 0.33 0.49
13 A' 236 236 2.10 2.53 0.72 0.84
14 A" 3098 3098 19.93 25.65 0.75 0.86
15 A" 3042 3042 1.72 92.70 0.75 0.86
16 A" 1535 1535 8.79 23.31 0.75 0.86
17 A" 1315 1315 0.03 10.57 0.75 0.86
18 A" 1135 1135 1.00 0.15 0.75 0.86
19 A" 806 806 5.69 0.59 0.75 0.86
20 A" 445 445 0.18 3.24 0.75 0.86
21 A" 225 225 0.46 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16264.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16264.6 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 B97D3/3-21G*
ABC
0.90295 0.15524 0.13948

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.531 0.542 0.000
C2 0.000 0.824 0.000
C3 -0.777 -0.417 0.000
N4 -1.383 -1.422 0.000
H5 2.080 1.494 0.000
H6 1.811 -0.032 0.893
H7 1.811 -0.032 -0.893
H8 -0.273 1.415 0.889
H9 -0.273 1.415 -0.889

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55702.49903.51431.09901.09811.09812.19312.1931
C21.55701.46392.63832.18492.19382.19381.10191.1019
C32.49901.46391.17453.43662.76492.76492.09742.0974
N43.51432.63831.17454.52733.59653.59653.17403.1740
H51.09902.18493.43664.52731.78861.78862.51672.5167
H61.09812.19382.76493.59651.78861.78632.53823.1013
H71.09812.19382.76493.59651.78861.78633.10132.5382
H82.19311.10192.09743.17402.51672.53823.10131.7778
H92.19311.10192.09743.17402.51673.10132.53821.7778

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 111.596 C1 C2 H8 109.962
C1 C2 H9 109.962 C2 C1 H5 109.492
C2 C1 H6 110.237 C2 C1 H7 110.237
C2 C3 N4 179.020 C3 C2 H8 108.839
C3 C2 H9 108.839 H5 C1 H6 108.995
H5 C1 H7 108.995 H6 C1 H7 108.857
H8 C2 H9 107.544
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.564      
2 C -0.485      
3 C 0.371      
4 N -0.494      
5 H 0.212      
6 H 0.222      
7 H 0.222      
8 H 0.258      
9 H 0.258      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.131 2.998 0.000 3.678
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.701 -3.508 0.000
y -3.508 -27.096 0.000
z 0.000 0.000 -23.657
Traceless
 xyz
x -1.325 -3.508 0.000
y -3.508 -1.917 0.000
z 0.000 0.000 3.242
Polar
3z2-r26.484
x2-y20.395
xy-3.508
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.964 1.222 0.000
y 1.222 5.476 0.000
z 0.000 0.000 3.694


<r2> (average value of r2) Å2
<r2> 88.698
(<r2>)1/2 9.418