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

using model chemistry: PBE1PBE/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at PBE1PBE/daug-cc-pVTZ
 hartrees
Energy at 0K-171.917124
Energy at 298.15K 
HF Energy-171.917124
Nuclear repulsion energy103.336450
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 PBE1PBE/daug-cc-pVTZ
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' 3145 3145 13.02 67.60 0.69 0.82
2 A' 3066 3066 15.55 30.13 0.10 0.18
3 A' 3063 3063 3.59 273.83 0.02 0.03
4 A' 2378 2378 12.78 94.43 0.15 0.26
5 A' 1498 1498 6.29 2.81 0.73 0.84
6 A' 1464 1464 6.40 7.81 0.67 0.80
7 A' 1410 1410 1.92 0.51 0.51 0.68
8 A' 1346 1346 3.05 2.76 0.43 0.60
9 A' 1095 1095 3.78 5.50 0.12 0.21
10 A' 1035 1035 0.47 3.23 0.46 0.63
11 A' 854 854 0.05 5.70 0.06 0.12
12 A' 555 555 0.86 1.36 0.16 0.27
13 A' 212 212 4.38 1.90 0.70 0.82
14 A" 3148 3148 11.71 24.38 0.75 0.86
15 A" 3101 3101 0.23 80.86 0.75 0.86
16 A" 1490 1490 8.35 4.93 0.75 0.86
17 A" 1286 1286 0.01 1.82 0.75 0.86
18 A" 1109 1109 0.43 0.11 0.75 0.86
19 A" 786 786 4.06 0.39 0.75 0.86
20 A" 397 397 0.39 1.20 0.75 0.86
21 A" 218 218 1.06 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16327.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16327.3 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 PBE1PBE/daug-cc-pVTZ
ABC
0.94274 0.15795 0.14242

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/daug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.507 0.562 0.000
C2 0.000 0.807 0.000
C3 -0.766 -0.431 0.000
N4 -1.358 -1.416 0.000
H5 2.036 1.515 0.000
H6 1.810 -0.001 0.883
H7 1.810 -0.001 -0.883
H8 -0.298 1.386 0.877
H9 -0.298 1.386 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52632.48003.48111.09011.08981.08982.16922.1692
C21.52631.45522.60482.15562.16952.16951.09291.0929
C32.48001.45521.14973.41122.75672.75672.07132.0713
N43.48112.60481.14974.48443.58013.58013.12223.1222
H51.09012.15563.41124.48441.76841.76842.49662.4966
H61.08982.16952.75673.58011.76841.76512.52343.0764
H71.08982.16952.75673.58011.76841.76513.07642.5234
H82.16921.09292.07133.12222.49662.52343.07641.7543
H92.16921.09292.07133.12222.49663.07642.52341.7543

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 112.542 C1 C2 H8 110.738
C1 C2 H9 110.738 C2 C1 H5 109.831
C2 C1 H6 110.951 C2 C1 H7 110.951
C2 C3 N4 179.210 C3 C2 H8 107.914
C3 C2 H9 107.914 H5 C1 H6 108.435
H5 C1 H7 108.435 H6 C1 H7 108.157
H8 C2 H9 106.763
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.760      
2 C 0.068      
3 C 0.375      
4 N -1.018      
5 H 0.315      
6 H 0.207      
7 H 0.207      
8 H 0.303      
9 H 0.303      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.364 3.422 0.000 4.159
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.315 -3.836 0.000
y -3.836 -27.754 0.000
z 0.000 0.000 -23.921
Traceless
 xyz
x -1.477 -3.836 0.000
y -3.836 -2.136 0.000
z 0.000 0.000 3.614
Polar
3z2-r27.227
x2-y20.439
xy-3.836
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.623 1.157 0.000
y 1.157 6.806 0.000
z 0.000 0.000 5.109


<r2> (average value of r2) Å2
<r2> 87.554
(<r2>)1/2 9.357