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

using model chemistry: B1B95/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B1B95/6-31G(2df,p)
 hartrees
Energy at 0K-171.992310
Energy at 298.15K 
HF Energy-171.992310
Nuclear repulsion energy103.241723
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 B1B95/6-31G(2df,p)
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' 3173 3039 13.29 69.21 0.71 0.83
2 A' 3084 2954 16.72 32.10 0.06 0.12
3 A' 3081 2951 3.67 176.80 0.04 0.07
4 A' 2396 2294 9.78 61.77 0.25 0.40
5 A' 1504 1440 4.84 8.46 0.73 0.85
6 A' 1468 1406 4.59 14.67 0.70 0.82
7 A' 1411 1351 0.96 1.87 0.68 0.81
8 A' 1345 1288 3.52 4.63 0.59 0.74
9 A' 1094 1048 3.59 4.22 0.12 0.22
10 A' 1038 994 0.49 4.09 0.54 0.70
11 A' 856 820 0.09 4.96 0.14 0.24
12 A' 555 532 0.95 1.41 0.34 0.51
13 A' 213 204 4.32 2.18 0.72 0.84
14 A" 3177 3043 12.10 27.80 0.75 0.86
15 A" 3125 2993 0.87 85.72 0.75 0.86
16 A" 1496 1432 6.35 15.14 0.75 0.86
17 A" 1284 1230 0.03 5.94 0.75 0.86
18 A" 1108 1061 0.25 0.18 0.75 0.86
19 A" 785 752 4.35 0.35 0.75 0.86
20 A" 407 390 0.55 2.27 0.75 0.86
21 A" 223 214 1.07 0.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16411.6 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 15717.4 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 B1B95/6-31G(2df,p)
ABC
0.94146 0.15766 0.14215

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.508 0.562 0.000
C2 0.000 0.808 0.000
C3 -0.766 -0.431 0.000
N4 -1.360 -1.418 0.000
H5 2.037 1.515 0.000
H6 1.810 -0.001 0.883
H7 1.810 -0.001 -0.883
H8 -0.295 1.389 0.877
H9 -0.295 1.389 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52762.48063.48491.08991.08961.08962.16892.1689
C21.52761.45612.60862.15662.16982.16981.09261.0926
C32.48061.45611.15253.41192.75602.75602.07412.0741
N43.48492.60861.15254.48813.58243.58243.12793.1279
H51.08992.15663.41194.48811.76861.76862.49532.4953
H61.08962.16982.75603.58241.76861.76502.52293.0756
H71.08962.16982.75603.58241.76861.76503.07562.5229
H82.16891.09262.07413.12792.49532.52293.07561.7531
H92.16891.09262.07413.12792.49533.07562.52291.7531

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 112.463 C1 C2 H8 110.642
C1 C2 H9 110.642 C2 C1 H5 109.825
C2 C1 H6 110.897 C2 C1 H7 110.897
C2 C3 N4 179.322 C3 C2 H8 108.091
C3 C2 H9 108.091 H5 C1 H6 108.481
H5 C1 H7 108.481 H6 C1 H7 108.185
H8 C2 H9 106.693
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.405      
2 C -0.340      
3 C 0.267      
4 N -0.316      
5 H 0.142      
6 H 0.156      
7 H 0.156      
8 H 0.170      
9 H 0.170      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.240 3.239 0.000 3.938
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.558 -3.662 0.000
y -3.662 -26.973 0.000
z 0.000 0.000 -23.328
Traceless
 xyz
x -1.407 -3.662 0.000
y -3.662 -2.031 0.000
z 0.000 0.000 3.437
Polar
3z2-r26.875
x2-y20.416
xy-3.662
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.524 1.159 0.000
y 1.159 5.913 0.000
z 0.000 0.000 4.215


<r2> (average value of r2) Å2
<r2> 87.231
(<r2>)1/2 9.340