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

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G**
 hartrees
Energy at 0K-171.876773
Energy at 298.15K 
HF Energy-171.876773
Nuclear repulsion energy102.905204
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 HSEh1PBE/6-31G**
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' 3174 3029 14.40 74.61 0.71 0.83
2 A' 3085 2944 17.67 55.52 0.02 0.05
3 A' 3080 2939 3.91 164.74 0.05 0.09
4 A' 2398 2289 9.78 60.24 0.29 0.45
5 A' 1515 1446 6.07 10.93 0.74 0.85
6 A' 1478 1410 5.58 17.56 0.71 0.83
7 A' 1425 1360 1.84 2.74 0.66 0.80
8 A' 1355 1293 2.94 5.20 0.61 0.76
9 A' 1101 1051 4.90 3.62 0.16 0.28
10 A' 1041 993 0.65 4.45 0.54 0.70
11 A' 860 820 0.04 4.74 0.17 0.30
12 A' 555 529 1.08 1.95 0.43 0.60
13 A' 213 203 4.11 2.88 0.73 0.84
14 A" 3178 3033 13.37 31.90 0.75 0.86
15 A" 3124 2982 1.17 91.44 0.75 0.86
16 A" 1507 1438 7.78 18.75 0.75 0.86
17 A" 1291 1232 0.06 7.55 0.75 0.86
18 A" 1114 1063 0.33 0.13 0.75 0.86
19 A" 792 755 5.14 0.41 0.75 0.86
20 A" 401 383 0.28 3.49 0.75 0.86
21 A" 225 215 1.00 0.59 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16454.8 cm-1
Scaled (by 0.9543) Zero Point Vibrational Energy (zpe) 15702.8 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 HSEh1PBE/6-31G**
ABC
0.93804 0.15653 0.14119

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.567 0.000
C2 0.000 0.810 0.000
C3 -0.767 -0.432 0.000
N4 -1.363 -1.426 0.000
H5 2.040 1.523 0.000
H6 1.817 0.004 0.885
H7 1.817 0.004 -0.885
H8 -0.298 1.392 0.879
H9 -0.298 1.392 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53012.48723.49771.09271.09241.09242.17372.1737
C21.53011.45972.61872.16122.17512.17511.09571.0957
C32.48721.45971.15913.42092.76532.76532.07882.0788
N43.49772.61871.15914.50353.59723.59723.13863.1386
H51.09272.16123.42094.50351.77201.77202.50122.5012
H61.09242.17512.76533.59721.77201.76942.52953.0836
H71.09242.17512.76533.59721.77201.76943.08362.5295
H82.17371.09572.07883.13862.50122.52953.08361.7575
H92.17371.09572.07883.13862.50123.08362.52951.7575

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 112.574 C1 C2 H8 110.663
C1 C2 H9 110.663 C2 C1 H5 109.856
C2 C1 H6 110.979 C2 C1 H7 110.979
C2 C3 N4 179.288 C3 C2 H8 108.035
C3 C2 H9 108.035 H5 C1 H6 108.384
H5 C1 H7 108.384 H6 C1 H7 108.174
H8 C2 H9 106.640
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.394      
2 C -0.315      
3 C 0.343      
4 N -0.472      
5 H 0.147      
6 H 0.159      
7 H 0.159      
8 H 0.186      
9 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.245 3.259 0.000 3.957
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.660 -3.696 0.000
y -3.696 -27.151 0.000
z 0.000 0.000 -23.503
Traceless
 xyz
x -1.333 -3.696 0.000
y -3.696 -2.069 0.000
z 0.000 0.000 3.402
Polar
3z2-r26.804
x2-y20.491
xy-3.696
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.272 1.229 0.000
y 1.229 5.828 0.000
z 0.000 0.000 4.010


<r2> (average value of r2) Å2
<r2> 87.799
(<r2>)1/2 9.370