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

using model chemistry: B2PLYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-169.650297
Energy at 298.15K 
HF Energy-169.555427
Nuclear repulsion energy100.437426
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/STO-3G
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' 3537 3537 0.22 31.44 0.73 0.84
2 A' 3375 3375 0.10 35.33 0.13 0.24
3 A' 3363 3363 0.60 46.07 0.02 0.04
4 A' 2302 2302 17.56 13.04 0.23 0.37
5 A' 1707 1707 2.95 8.70 0.74 0.85
6 A' 1659 1659 1.92 20.51 0.75 0.85
7 A' 1594 1594 0.17 3.76 0.75 0.86
8 A' 1484 1484 6.05 5.04 0.70 0.83
9 A' 1196 1196 3.71 3.31 0.27 0.43
10 A' 1103 1103 1.02 5.71 0.60 0.75
11 A' 877 877 0.18 4.48 0.21 0.34
12 A' 543 543 0.92 0.84 0.33 0.49
13 A' 213 213 2.16 1.60 0.73 0.84
14 A" 3540 3540 0.18 17.65 0.75 0.86
15 A" 3478 3478 0.32 38.35 0.75 0.86
16 A" 1701 1701 3.49 17.39 0.75 0.86
17 A" 1401 1401 0.00 11.58 0.75 0.86
18 A" 1217 1217 0.34 0.67 0.75 0.86
19 A" 861 861 4.61 0.17 0.75 0.86
20 A" 374 374 0.27 1.69 0.75 0.86
21 A" 212 212 0.52 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17868.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17868.6 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/STO-3G
ABC
0.90072 0.14839 0.13391

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.541 0.594 0.000
C2 0.000 0.841 0.000
C3 -0.778 -0.448 0.000
N4 -1.392 -1.485 0.000
H5 2.066 1.560 0.000
H6 1.841 0.029 0.894
H7 1.841 0.029 -0.894
H8 -0.291 1.425 0.892
H9 -0.291 1.425 -0.892

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.56022.54263.59441.09991.09961.09962.20042.2004
C21.56021.50612.71012.18812.20192.20191.10571.1057
C32.54261.50611.20403.48252.80852.80852.13192.1319
N43.59442.71011.20404.60763.67943.67943.23653.2365
H51.09992.18813.48254.60761.78771.78772.52442.5244
H61.09962.20192.80853.67941.78771.78712.54903.1124
H71.09962.20192.80853.67941.78771.78713.11242.5490
H82.20041.10572.13193.23652.52442.54903.11241.7849
H92.20041.10572.13193.23652.52443.11242.54901.7849

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 112.018 C1 C2 H8 110.086
C1 C2 H9 110.086 C2 C1 H5 109.466
C2 C1 H6 110.565 C2 C1 H7 110.565
C2 C3 N4 179.505 C3 C2 H8 108.447
C3 C2 H9 108.447 H5 C1 H6 108.742
H5 C1 H7 108.742 H6 C1 H7 108.715
H8 C2 H9 107.633
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.193      
2 C -0.116      
3 C 0.056      
4 N -0.181      
5 H 0.079      
6 H 0.080      
7 H 0.080      
8 H 0.097      
9 H 0.097      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.693 2.521 0.000 3.037
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.936 -3.121 -0.004
y -3.121 -25.575 -0.004
z -0.004 -0.004 -22.235
Traceless
 xyz
x -1.031 -3.121 -0.004
y -3.121 -1.989 -0.004
z -0.004 -0.004 3.020
Polar
3z2-r26.041
x2-y20.639
xy-3.121
xz-0.004
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.701 0.869 0.000
y 0.869 3.272 0.000
z 0.000 0.000 1.979


<r2> (average value of r2) Å2
<r2> 90.482
(<r2>)1/2 9.512