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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-29.857723
Energy at 298.15K 
HF Energy-29.857723
Nuclear repulsion energy55.333564
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
4/u)
Dep P Dep U
1 A' 3111 3015 31.67 81.82 0.71 0.83
2 A' 3042 2949 11.40 127.65 0.08 0.14
3 A' 3036 2943 26.11 136.17 0.01 0.02
4 A' 2302 2231 7.36 74.49 0.22 0.36
5 A' 1514 1468 6.26 6.62 0.74 0.85
6 A' 1486 1440 4.88 15.86 0.73 0.85
7 A' 1422 1379 1.05 1.99 0.22 0.37
8 A' 1345 1304 4.11 4.36 0.55 0.71
9 A' 1087 1054 4.42 3.33 0.15 0.26
10 A' 997 966 0.87 7.89 0.43 0.60
11 A' 822 796 0.73 6.01 0.14 0.25
12 A' 533 517 1.23 2.20 0.26 0.41
13 A' 207 200 3.43 3.05 0.74 0.85
14 A" 3120 3024 32.34 26.48 0.75 0.86
15 A" 3079 2985 2.61 107.77 0.75 0.86
16 A" 1507 1461 7.63 12.99 0.75 0.86
17 A" 1285 1246 0.02 6.82 0.75 0.86
18 A" 1111 1077 0.34 0.17 0.75 0.86
19 A" 782 758 2.62 0.29 0.75 0.86
20 A" 377 366 0.02 3.27 0.75 0.86
21 A" 217 210 0.81 0.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16189.7 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 15694.3 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 B3LYP/CEP-121G*
ABC
0.91880 0.15343 0.13829

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 1.529 0.570 0.000
C2 0.000 0.822 0.000
C3 -0.778 -0.439 0.000
N4 -1.377 -1.438 0.000
H5 2.060 1.530 0.000
H6 1.834 0.006 0.888
H7 1.834 0.006 -0.888
H8 -0.298 1.402 0.883
H9 -0.298 1.402 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.55002.51883.53251.09641.09541.09542.19352.1935
C21.55001.48182.64612.17802.19512.19511.09761.0976
C32.51881.48181.16443.45412.79482.79482.09762.0976
N43.53252.64611.16444.54063.63083.63083.16373.1637
H51.09642.17803.45414.54061.77831.77832.52082.5208
H61.09542.19512.79483.63081.77831.77572.54903.1035
H71.09542.19512.79483.63081.77831.77573.10352.5490
H82.19351.09762.09763.16372.52082.54903.10351.7651
H92.19351.09762.09763.16372.52083.10352.54901.7651

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 112.341 C1 C2 H8 110.726
C1 C2 H9 110.726 C2 C1 H5 109.579
C2 C1 H6 110.985 C2 C1 H7 110.985
C2 C3 N4 179.254 C3 C2 H8 107.899
C3 C2 H9 107.899 H5 C1 H6 108.458
H5 C1 H7 108.458 H6 C1 H7 108.301
H8 C2 H9 107.041
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 -0.539      
2 C -0.264      
3 C -0.169      
4 N 0.014      
5 H 0.185      
6 H 0.185      
7 H 0.185      
8 H 0.202      
9 H 0.202      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.289 3.340 0.000 4.049
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.305 -3.707 0.000
y -3.707 -27.572 0.000
z 0.000 0.000 -23.903
Traceless
 xyz
x -1.568 -3.707 0.000
y -3.707 -1.967 0.000
z 0.000 0.000 3.535
Polar
3z2-r27.070
x2-y20.266
xy-3.707
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.862 1.234 0.000
y 1.234 6.310 0.000
z 0.000 0.000 4.485


<r2> (average value of r2) Å2
<r2> 73.326
(<r2>)1/2 8.563