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

using model chemistry: PBEPBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at PBEPBE/STO-3G
 hartrees
Energy at 0K-169.702930
Energy at 298.15K 
HF Energy-169.702930
Nuclear repulsion energy100.234183
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 PBEPBE/STO-3G
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' 3429 3133 0.12 33.05 0.72 0.84
2 A' 3262 2981 0.76 15.56 0.05 0.09
3 A' 3254 2973 0.40 75.07 0.06 0.11
4 A' 2303 2104 7.85 21.65 0.25 0.40
5 A' 1641 1499 5.01 9.15 0.74 0.85
6 A' 1586 1449 3.31 20.03 0.73 0.85
7 A' 1524 1393 0.65 4.16 0.75 0.85
8 A' 1411 1289 3.73 7.68 0.69 0.81
9 A' 1147 1047 4.87 2.80 0.22 0.36
10 A' 1067 975 0.90 4.60 0.55 0.71
11 A' 856 782 0.18 3.31 0.20 0.34
12 A' 531 485 1.15 0.88 0.30 0.46
13 A' 206 188 1.64 1.58 0.73 0.84
14 A" 3434 3137 0.07 17.67 0.75 0.86
15 A" 3352 3062 0.64 40.62 0.75 0.86
16 A" 1634 1493 5.21 17.12 0.75 0.86
17 A" 1342 1226 0.05 11.08 0.75 0.86
18 A" 1162 1061 0.32 0.57 0.75 0.86
19 A" 828 756 7.15 0.21 0.75 0.86
20 A" 368 337 0.05 1.53 0.75 0.86
21 A" 204 187 0.39 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17270.0 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 15777.9 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 PBEPBE/STO-3G
ABC
0.89911 0.14795 0.13358

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.543 0.596 0.000
C2 0.000 0.838 0.000
C3 -0.778 -0.447 0.000
N4 -1.395 -1.486 0.000
H5 2.067 1.570 0.000
H6 1.847 0.028 0.898
H7 1.847 0.028 -0.898
H8 -0.294 1.428 0.897
H9 -0.294 1.428 -0.897

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.56172.54413.60081.10611.10541.10542.20732.2073
C21.56171.50142.71052.19282.20792.20791.11341.1134
C32.54411.50141.20913.48702.81482.81482.13362.1336
N43.60082.71051.20914.61793.68933.68933.24183.2418
H51.10612.19283.48704.61791.79791.79792.52992.5299
H61.10542.20792.81483.68931.79791.79662.55833.1255
H71.10542.20792.81483.68931.79791.79663.12552.5583
H82.20731.11342.13363.24182.52992.55833.12551.7943
H92.20731.11342.13363.24182.52993.12552.55831.7943

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 112.295 C1 C2 H8 110.066
C1 C2 H9 110.066 C2 C1 H5 109.377
C2 C1 H6 110.579 C2 C1 H7 110.579
C2 C3 N4 179.476 C3 C2 H8 108.452
C3 C2 H9 108.452 H5 C1 H6 108.777
H5 C1 H7 108.777 H6 C1 H7 108.707
H8 C2 H9 107.365
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.226      
2 C -0.147      
3 C 0.056      
4 N -0.182      
5 H 0.091      
6 H 0.093      
7 H 0.093      
8 H 0.111      
9 H 0.111      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.738 2.567 0.000 3.100
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.672 -3.004 0.000
y -3.004 -25.157 0.000
z 0.000 0.000 -22.070
Traceless
 xyz
x -1.058 -3.004 0.000
y -3.004 -1.787 0.000
z 0.000 0.000 2.845
Polar
3z2-r25.690
x2-y20.486
xy-3.004
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.824 0.975 0.000
y 0.975 3.427 0.000
z 0.000 0.000 1.985


<r2> (average value of r2) Å2
<r2> 90.541
(<r2>)1/2 9.515