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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-171.849508
Energy at 298.15K 
HF Energy-171.849508
Nuclear repulsion energy102.293533
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 PBEPBEultrafine/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' 3081 3050 12.73 71.77 0.71 0.83
2 A' 2997 2966 16.07 85.80 0.01 0.02
3 A' 2982 2952 5.33 132.71 0.06 0.11
4 A' 2277 2254 7.39 68.22 0.26 0.41
5 A' 1456 1441 4.67 9.23 0.74 0.85
6 A' 1415 1401 4.60 16.00 0.67 0.80
7 A' 1361 1347 0.87 2.17 0.74 0.85
8 A' 1293 1280 3.14 6.34 0.62 0.77
9 A' 1055 1045 3.37 3.61 0.10 0.18
10 A' 1005 995 0.14 3.89 0.52 0.69
11 A' 831 822 0.10 4.81 0.14 0.25
12 A' 537 531 0.88 1.37 0.30 0.46
13 A' 206 204 3.60 2.22 0.72 0.84
14 A" 3085 3053 11.73 31.76 0.75 0.86
15 A" 3021 2990 1.36 85.83 0.75 0.86
16 A" 1446 1431 6.11 15.95 0.75 0.86
17 A" 1241 1228 0.05 6.35 0.75 0.86
18 A" 1069 1058 0.31 0.26 0.75 0.86
19 A" 762 755 4.37 0.36 0.75 0.86
20 A" 392 388 0.22 2.09 0.75 0.86
21 A" 215 213 0.93 0.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15863.8 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 15700.4 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 PBEPBEultrafine/6-31G(2df,p)
ABC
0.92620 0.15488 0.13967

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.521 0.567 0.000
C2 0.000 0.812 0.000
C3 -0.771 -0.431 0.000
N4 -1.374 -1.432 0.000
H5 2.055 1.529 0.000
H6 1.827 -0.001 0.891
H7 1.827 -0.001 -0.891
H8 -0.297 1.403 0.884
H9 -0.297 1.403 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.54062.49933.51761.10041.10001.10002.18742.1874
C21.54061.46222.63102.17612.18932.18931.10411.1041
C32.49931.46221.16883.43842.77942.77942.09012.0901
N43.51762.63101.16884.53003.61713.61713.15883.1588
H51.10042.17613.43844.53001.78561.78562.51522.5152
H61.10002.18932.77943.61711.78561.78142.54613.1037
H71.10002.18932.77943.61711.78561.78143.10372.5461
H82.18741.10412.09013.15882.51522.54613.10371.7683
H92.18741.10412.09013.15882.51523.10372.54611.7683

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 112.651 C1 C2 H8 110.520
C1 C2 H9 110.520 C2 C1 H5 109.847
C2 C1 H6 110.907 C2 C1 H7 110.907
C2 C3 N4 179.248 C3 C2 H8 108.251
C3 C2 H9 108.251 H5 C1 H6 108.482
H5 C1 H7 108.482 H6 C1 H7 108.139
H8 C2 H9 106.413
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.407      
2 C -0.340      
3 C 0.304      
4 N -0.341      
5 H 0.141      
6 H 0.155      
7 H 0.155      
8 H 0.167      
9 H 0.167      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.209 3.178 0.000 3.871
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.630 -3.612 0.000
y -3.612 -27.029 0.000
z 0.000 0.000 -23.459
Traceless
 xyz
x -1.386 -3.612 0.000
y -3.612 -1.985 0.000
z 0.000 0.000 3.371
Polar
3z2-r26.743
x2-y20.399
xy-3.612
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.752 1.256 0.000
y 1.256 6.149 0.000
z 0.000 0.000 4.319


<r2> (average value of r2) Å2
<r2> 88.555
(<r2>)1/2 9.410