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

using model chemistry: B1B95/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B1B95/6-311G**
 hartrees
Energy at 0K-172.023685
Energy at 298.15K 
HF Energy-172.023685
Nuclear repulsion energy103.344541
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 B1B95/6-311G**
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' 3159 3033 17.50 77.39 0.71 0.83
2 A' 3077 2955 16.22 12.11 0.69 0.82
3 A' 3075 2953 7.47 235.28 0.02 0.03
4 A' 2393 2298 9.75 65.90 0.26 0.41
5 A' 1507 1447 6.78 6.86 0.74 0.85
6 A' 1472 1414 6.17 12.41 0.73 0.84
7 A' 1416 1359 2.05 1.77 0.33 0.50
8 A' 1350 1297 2.79 3.26 0.56 0.71
9 A' 1097 1053 4.05 3.56 0.16 0.28
10 A' 1039 997 0.70 4.57 0.48 0.65
11 A' 856 822 0.08 4.82 0.13 0.24
12 A' 556 534 0.96 1.96 0.36 0.53
13 A' 214 205 3.94 2.86 0.73 0.84
14 A" 3162 3036 17.03 29.22 0.75 0.86
15 A" 3115 2991 0.95 95.93 0.75 0.86
16 A" 1499 1439 8.61 11.35 0.75 0.86
17 A" 1290 1239 0.03 4.97 0.75 0.86
18 A" 1112 1068 0.44 0.06 0.75 0.86
19 A" 788 757 4.22 0.40 0.75 0.86
20 A" 401 385 0.19 3.03 0.75 0.86
21 A" 223 214 0.83 0.57 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16400.9 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 15746.5 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 B1B95/6-311G**
ABC
0.94408 0.15785 0.14235

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.507 0.562 0.000
C2 0.000 0.806 0.000
C3 -0.766 -0.431 0.000
N4 -1.359 -1.416 0.000
H5 2.036 1.514 0.000
H6 1.811 0.001 0.882
H7 1.811 0.001 -0.882
H8 -0.297 1.386 0.876
H9 -0.297 1.386 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52692.48103.48261.08901.08861.08862.16812.1681
C21.52691.45492.60472.15572.16912.16911.09161.0916
C32.48101.45491.14993.41112.75772.75772.07052.0705
N43.48262.60471.14994.48473.58203.58203.12183.1218
H51.08902.15573.41114.48471.76631.76632.49532.4953
H61.08862.16912.75773.58201.76631.76362.52203.0742
H71.08862.16912.75773.58201.76631.76363.07422.5220
H82.16811.09162.07053.12182.49532.52203.07421.7520
H92.16811.09162.07053.12182.49533.07422.52201.7520

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 112.597 C1 C2 H8 110.688
C1 C2 H9 110.688 C2 C1 H5 109.857
C2 C1 H6 110.949 C2 C1 H7 110.949
C2 C3 N4 179.226 C3 C2 H8 107.946
C3 C2 H9 107.946 H5 C1 H6 108.407
H5 C1 H7 108.407 H6 C1 H7 108.191
H8 C2 H9 106.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.339      
2 C -0.253      
3 C 0.078      
4 N -0.263      
5 H 0.136      
6 H 0.146      
7 H 0.146      
8 H 0.175      
9 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.256 3.276 0.000 3.978
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.002 -3.683 0.000
y -3.683 -27.388 0.000
z 0.000 0.000 -23.740
Traceless
 xyz
x -1.438 -3.683 0.000
y -3.683 -2.017 0.000
z 0.000 0.000 3.455
Polar
3z2-r26.910
x2-y20.386
xy-3.683
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.628 1.187 0.000
y 1.187 6.035 0.000
z 0.000 0.000 4.242


<r2> (average value of r2) Å2
<r2> 87.394
(<r2>)1/2 9.348