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

using model chemistry: B2PLYP=FULLultrafine/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-171.903536
Energy at 298.15K 
HF Energy-171.704131
Nuclear repulsion energy102.535369
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/6-31+G**
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' 3176 3176 18.56 78.36 0.71 0.83
2 A' 3097 3097 8.90 88.49 0.10 0.18
3 A' 3093 3093 18.37 168.13 0.01 0.02
4 A' 2293 2293 3.78 73.65 0.19 0.32
5 A' 1532 1532 6.31 5.57 0.72 0.84
6 A' 1502 1502 5.18 11.98 0.75 0.85
7 A' 1445 1445 1.59 2.05 0.29 0.45
8 A' 1370 1370 3.70 3.64 0.59 0.75
9 A' 1110 1110 3.84 4.25 0.12 0.22
10 A' 1030 1030 0.51 6.55 0.45 0.62
11 A' 847 847 0.32 5.45 0.13 0.22
12 A' 540 540 1.00 2.25 0.30 0.46
13 A' 209 209 3.92 3.37 0.74 0.85
14 A" 3183 3183 17.40 27.43 0.75 0.86
15 A" 3140 3140 1.01 91.87 0.75 0.86
16 A" 1526 1526 8.47 10.67 0.75 0.86
17 A" 1304 1304 0.00 5.23 0.75 0.86
18 A" 1130 1130 0.46 0.10 0.75 0.86
19 A" 800 800 2.60 0.35 0.75 0.86
20 A" 383 383 0.13 3.07 0.75 0.86
21 A" 227 227 0.90 0.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16468.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16468.8 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/6-31+G**
ABC
0.93342 0.15515 0.13995

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.516 0.572 0.000
C2 0.000 0.816 0.000
C3 -0.768 -0.434 0.000
N4 -1.368 -1.437 0.000
H5 2.042 1.528 0.000
H6 1.819 0.011 0.884
H7 1.819 0.011 -0.884
H8 -0.297 1.393 0.879
H9 -0.297 1.393 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53512.49573.51451.09081.09011.09012.17522.1752
C21.53511.46722.63552.16252.17672.17671.09261.0926
C32.49571.46721.16843.42722.76982.76982.08202.0820
N43.51452.63551.16844.51843.61023.61023.15123.1512
H51.09082.16253.42724.51841.76981.76982.50202.5020
H61.09012.17672.76983.61021.76981.76762.52763.0814
H71.09012.17672.76983.61021.76981.76763.08142.5276
H82.17521.09262.08203.15122.50202.52763.08141.7572
H92.17521.09262.08203.15122.50203.08142.52761.7572

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 112.437 C1 C2 H8 110.619
C1 C2 H9 110.619 C2 C1 H5 109.714
C2 C1 H6 110.883 C2 C1 H7 110.883
C2 C3 N4 179.329 C3 C2 H8 107.951
C3 C2 H9 107.951 H5 C1 H6 108.478
H5 C1 H7 108.478 H6 C1 H7 108.333
H8 C2 H9 107.059
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.443      
2 C -0.181      
3 C 0.227      
4 N -0.455      
5 H 0.155      
6 H 0.163      
7 H 0.163      
8 H 0.185      
9 H 0.185      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.321 3.406 0.000 4.122
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.796 -3.930 -0.007
y -3.930 -28.322 -0.004
z -0.007 -0.004 -24.309
Traceless
 xyz
x -1.480 -3.930 -0.007
y -3.930 -2.270 -0.004
z -0.007 -0.004 3.750
Polar
3z2-r27.500
x2-y20.526
xy-3.930
xz-0.007
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.891 1.268 0.000
y 1.268 6.447 0.000
z 0.000 0.000 4.509


<r2> (average value of r2) Å2
<r2> 88.995
(<r2>)1/2 9.434