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

using model chemistry: B3PW91/aug-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 B3PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-172.062837
Energy at 298.15K 
HF Energy-172.062837
Nuclear repulsion energy103.214969
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 B3PW91/aug-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' 3131 3022 14.00 67.46 0.70 0.83
2 A' 3055 2948 17.16 56.78 0.04 0.08
3 A' 3051 2945 3.57 246.64 0.02 0.04
4 A' 2360 2278 12.36 94.46 0.16 0.27
5 A' 1498 1446 5.91 2.92 0.73 0.84
6 A' 1463 1412 6.17 7.90 0.66 0.80
7 A' 1410 1361 1.63 0.46 0.56 0.71
8 A' 1343 1296 3.02 2.96 0.43 0.60
9 A' 1091 1053 3.77 4.94 0.12 0.21
10 A' 1025 989 0.33 3.87 0.41 0.58
11 A' 847 818 0.05 5.77 0.07 0.13
12 A' 552 533 0.87 1.42 0.15 0.26
13 A' 212 205 4.36 1.96 0.71 0.83
14 A" 3136 3027 12.91 25.30 0.75 0.86
15 A" 3087 2980 0.40 80.79 0.75 0.86
16 A" 1490 1438 7.98 5.02 0.75 0.86
17 A" 1285 1240 0.01 1.91 0.75 0.86
18 A" 1109 1070 0.43 0.10 0.75 0.86
19 A" 786 758 3.92 0.39 0.75 0.86
20 A" 394 380 0.40 1.24 0.75 0.86
21 A" 217 210 1.06 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16270.6 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 15702.8 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 B3PW91/aug-cc-pVTZ
ABC
0.94334 0.15731 0.14191

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.564 0.000
C2 0.000 0.806 0.000
C3 -0.767 -0.432 0.000
N4 -1.362 -1.417 0.000
H5 2.038 1.518 0.000
H6 1.815 0.002 0.882
H7 1.815 0.002 -0.882
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
C11.52962.48583.48911.09011.08951.08952.17122.1712
C21.52961.45682.60742.15842.17242.17241.09271.0927
C32.48581.45681.15063.41622.76332.76332.07232.0723
N43.48912.60741.15064.49133.58963.58963.12393.1239
H51.09012.15843.41624.49131.76801.76802.49832.4983
H61.08952.17242.76333.58961.76801.76502.52543.0780
H71.08952.17242.76333.58961.76801.76503.07802.5254
H82.17121.09272.07233.12392.49832.52543.07801.7543
H92.17121.09272.07233.12392.49833.07802.52541.7543

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 112.667 C1 C2 H8 110.677
C1 C2 H9 110.677 C2 C1 H5 109.819
C2 C1 H6 110.965 C2 C1 H7 110.965
C2 C3 N4 179.320 C3 C2 H8 107.898
C3 C2 H9 107.898 H5 C1 H6 108.412
H5 C1 H7 108.412 H6 C1 H7 108.188
H8 C2 H9 106.789
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.659      
2 C -0.068      
3 C 0.232      
4 N -0.537      
5 H 0.205      
6 H 0.219      
7 H 0.219      
8 H 0.194      
9 H 0.194      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.367 3.413 0.000 4.154
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.263 -3.857 0.000
y -3.857 -27.708 0.000
z 0.000 0.000 -23.844
Traceless
 xyz
x -1.487 -3.857 0.000
y -3.857 -2.154 0.000
z 0.000 0.000 3.641
Polar
3z2-r27.282
x2-y20.445
xy-3.857
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.637 1.177 0.000
y 1.177 6.816 0.000
z 0.000 0.000 5.099


<r2> (average value of r2) Å2
<r2> 87.755
(<r2>)1/2 9.368