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

using model chemistry: BLYP/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 BLYP/6-31+G**
 hartrees
Energy at 0K-172.006780
Energy at 298.15K 
HF Energy-172.006780
Nuclear repulsion energy101.694679
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 BLYP/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' 3053 3037 21.24 88.26 0.70 0.83
2 A' 2982 2966 24.35 123.43 0.01 0.02
3 A' 2970 2954 8.31 158.16 0.06 0.11
4 A' 2250 2238 9.38 99.46 0.20 0.33
5 A' 1473 1465 6.33 5.60 0.72 0.84
6 A' 1439 1432 5.16 12.66 0.73 0.84
7 A' 1382 1375 0.96 2.04 0.32 0.49
8 A' 1306 1299 3.92 5.78 0.59 0.74
9 A' 1059 1053 3.58 3.62 0.11 0.19
10 A' 975 969 0.17 7.61 0.39 0.56
11 A' 811 807 0.05 5.36 0.13 0.23
12 A' 524 521 1.17 2.40 0.24 0.39
13 A' 204 203 3.58 3.63 0.74 0.85
14 A" 3059 3043 20.02 34.69 0.75 0.86
15 A" 3003 2987 2.27 96.14 0.75 0.86
16 A" 1466 1458 8.43 10.00 0.75 0.86
17 A" 1251 1244 0.00 5.35 0.75 0.86
18 A" 1082 1076 0.50 0.12 0.75 0.86
19 A" 771 767 3.11 0.38 0.75 0.86
20 A" 373 371 0.06 2.97 0.75 0.86
21 A" 216 215 0.82 0.85 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15823.9 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 15740.1 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 BLYP/6-31+G**
ABC
0.92218 0.15226 0.13747

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.535 0.576 0.000
C2 0.000 0.815 0.000
C3 -0.778 -0.437 0.000
N4 -1.385 -1.442 0.000
H5 2.059 1.544 0.000
H6 1.845 0.011 0.892
H7 1.845 0.011 -0.892
H8 -0.298 1.403 0.886
H9 -0.298 1.403 -0.886

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55312.52453.54921.10101.10031.10032.19692.1969
C21.55311.47442.64862.18402.20162.20161.10381.1038
C32.52451.47441.17433.46012.80652.80652.09792.0979
N43.54922.64861.17434.55843.65283.65283.17213.1721
H51.10102.18403.46014.55841.78611.78612.52172.5217
H61.10032.20162.80653.65281.78611.78362.55553.1128
H71.10032.20162.80653.65281.78611.78363.11282.5555
H82.19691.10382.09793.17212.52172.55553.11281.7711
H92.19691.10382.09793.17212.52173.11282.55551.7711

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 112.966 C1 C2 H8 110.414
C1 C2 H9 110.414 C2 C1 H5 109.572
C2 C1 H6 110.986 C2 C1 H7 110.986
C2 C3 N4 179.307 C3 C2 H8 108.057
C3 C2 H9 108.057 H5 C1 H6 108.465
H5 C1 H7 108.465 H6 C1 H7 108.292
H8 C2 H9 106.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.464      
2 C -0.200      
3 C 0.312      
4 N -0.501      
5 H 0.156      
6 H 0.166      
7 H 0.166      
8 H 0.183      
9 H 0.183      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.355 3.413 0.000 4.147
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.955 -3.957 0.000
y -3.957 -28.428 0.000
z 0.000 0.000 -24.463
Traceless
 xyz
x -1.509 -3.957 0.000
y -3.957 -2.219 0.000
z 0.000 0.000 3.728
Polar
3z2-r27.457
x2-y20.474
xy-3.957
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.396 1.430 0.000
y 1.430 6.913 0.000
z 0.000 0.000 4.752


<r2> (average value of r2) Å2
<r2> 90.413
(<r2>)1/2 9.509