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

using model chemistry: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-29.802473
Energy at 298.15K 
HF Energy-29.802473
Nuclear repulsion energy55.006805
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 B3LYP/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3098 3019 38.08 81.12 0.70 0.83
2 A' 3017 2940 12.31 167.71 0.06 0.11
3 A' 3005 2929 32.79 104.56 0.01 0.02
4 A' 2234 2177 7.31 72.86 0.21 0.35
5 A' 1527 1488 9.71 8.38 0.75 0.85
6 A' 1504 1466 8.68 19.46 0.72 0.84
7 A' 1437 1401 3.20 1.70 0.33 0.50
8 A' 1355 1321 2.15 6.15 0.60 0.75
9 A' 1100 1072 7.24 3.55 0.15 0.27
10 A' 1016 990 1.59 10.07 0.42 0.59
11 A' 822 801 0.81 7.83 0.15 0.27
12 A' 531 518 2.45 2.66 0.28 0.44
13 A' 208 203 2.57 3.60 0.74 0.85
14 A" 3107 3027 39.75 24.70 0.75 0.86
15 A" 3062 2984 3.22 108.50 0.75 0.86
16 A" 1519 1480 9.86 15.97 0.75 0.86
17 A" 1290 1258 0.04 9.53 0.75 0.86
18 A" 1129 1100 0.87 0.10 0.75 0.86
19 A" 800 780 3.73 0.37 0.75 0.86
20 A" 374 364 0.11 4.23 0.75 0.86
21 A" 212 207 0.59 0.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16173.3 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 15760.9 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 B3LYP/CEP-121G
ABC
0.91488 0.15108 0.13630

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.537 0.580 0.000
C2 0.000 0.825 0.000
C3 -0.779 -0.440 0.000
N4 -1.388 -1.455 0.000
H5 2.063 1.542 0.000
H6 1.845 0.016 0.888
H7 1.845 0.016 -0.888
H8 -0.293 1.410 0.883
H9 -0.293 1.410 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55672.53083.56301.09681.09591.09592.19512.1951
C21.55671.48602.66952.18402.20162.20161.09831.0983
C32.53081.48601.18363.46512.80752.80752.10602.1060
N43.56302.66951.18364.57073.66093.66093.19103.1910
H51.09682.18403.46514.57071.77921.77922.51972.5197
H61.09592.20162.80753.66091.77921.77652.55213.1063
H71.09592.20162.80753.66091.77921.77653.10632.5521
H82.19511.09832.10603.19102.51972.55213.10631.7652
H92.19511.09832.10603.19102.51973.10632.55211.7652

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 112.540 C1 C2 H8 110.348
C1 C2 H9 110.348 C2 C1 H5 109.561
C2 C1 H6 110.995 C2 C1 H7 110.995
C2 C3 N4 179.316 C3 C2 H8 108.227
C3 C2 H9 108.227 H5 C1 H6 108.464
H5 C1 H7 108.464 H6 C1 H7 108.286
H8 C2 H9 106.958
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.478      
2 C -0.275      
3 C -0.352      
4 N 0.230      
5 H 0.166      
6 H 0.169      
7 H 0.169      
8 H 0.186      
9 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.335 3.424 0.000 4.144
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.597 -4.022 0.000
y -4.022 -28.149 0.000
z 0.000 0.000 -24.070
Traceless
 xyz
x -1.488 -4.022 0.000
y -4.022 -2.316 0.000
z 0.000 0.000 3.803
Polar
3z2-r27.607
x2-y20.552
xy-4.022
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.685 1.290 0.000
y 1.290 6.277 0.000
z 0.000 0.000 4.362


<r2> (average value of r2) Å2
<r2> 74.278
(<r2>)1/2 8.618