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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G**
 hartrees
Energy at 0K-171.855511
Energy at 298.15K 
HF Energy-171.855511
Nuclear repulsion energy102.856797
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/6-31G**
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' 3177 3028 14.59 74.59 0.72 0.84
2 A' 3092 2947 17.53 65.20 0.02 0.04
3 A' 3087 2943 4.09 147.93 0.06 0.11
4 A' 2400 2287 9.36 59.46 0.29 0.45
5 A' 1531 1459 6.71 10.88 0.74 0.85
6 A' 1496 1426 5.60 17.99 0.71 0.83
7 A' 1440 1372 2.23 2.84 0.66 0.79
8 A' 1368 1303 2.95 5.69 0.62 0.76
9 A' 1108 1056 5.29 3.53 0.16 0.28
10 A' 1046 997 0.70 4.56 0.53 0.69
11 A' 862 821 0.06 4.65 0.18 0.30
12 A' 555 529 1.10 1.97 0.43 0.60
13 A' 214 204 4.09 2.86 0.73 0.84
14 A" 3183 3033 13.46 31.42 0.75 0.86
15 A" 3130 2983 1.17 92.27 0.75 0.86
16 A" 1524 1452 8.49 19.19 0.75 0.86
17 A" 1302 1241 0.07 8.04 0.75 0.86
18 A" 1125 1073 0.27 0.12 0.75 0.86
19 A" 797 760 5.28 0.40 0.75 0.86
20 A" 402 383 0.28 3.49 0.75 0.86
21 A" 226 216 0.99 0.61 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16531.9 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 15756.6 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 PBE1PBE/6-31G**
ABC
0.93553 0.15651 0.14113

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.566 0.000
C2 0.000 0.811 0.000
C3 -0.767 -0.432 0.000
N4 -1.364 -1.426 0.000
H5 2.042 1.523 0.000
H6 1.816 0.002 0.886
H7 1.816 0.002 -0.886
H8 -0.296 1.394 0.880
H9 -0.296 1.394 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53072.48703.49751.09401.09341.09342.17422.1742
C21.53071.46112.62032.16222.17632.17631.09641.0964
C32.48701.46111.15933.42212.76472.76472.08152.0815
N43.49752.62031.15934.50483.59633.59633.14163.1416
H51.09402.16223.42214.50481.77421.77422.50162.5016
H61.09342.17632.76473.59631.77421.77162.52983.0850
H71.09342.17632.76473.59631.77421.77163.08502.5298
H82.17421.09642.08153.14162.50162.52983.08501.7597
H92.17421.09642.08153.14162.50163.08502.52981.7597

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 112.440 C1 C2 H8 110.615
C1 C2 H9 110.615 C2 C1 H5 109.813
C2 C1 H6 110.964 C2 C1 H7 110.964
C2 C3 N4 179.323 C3 C2 H8 108.111
C3 C2 H9 108.111 H5 C1 H6 108.400
H5 C1 H7 108.400 H6 C1 H7 108.217
H8 C2 H9 106.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.525      
2 C -0.413      
3 C 0.357      
4 N -0.470      
5 H 0.191      
6 H 0.201      
7 H 0.201      
8 H 0.228      
9 H 0.228      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.236 3.255 0.000 3.949
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.717 -3.687 0.000
y -3.687 -27.153 0.000
z 0.000 0.000 -23.497
Traceless
 xyz
x -1.392 -3.687 0.000
y -3.687 -2.046 0.000
z 0.000 0.000 3.438
Polar
3z2-r26.877
x2-y20.436
xy-3.687
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.201 1.223 0.000
y 1.223 5.769 0.000
z 0.000 0.000 3.959


<r2> (average value of r2) Å2
<r2> 87.847
(<r2>)1/2 9.373