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

using model chemistry: wB97X-D/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at wB97X-D/6-31G(2df,p)
 hartrees
Energy at 0K-172.019058
Energy at 298.15K 
HF Energy-172.019058
Nuclear repulsion energy102.979357
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 wB97X-D/6-31G(2df,p)
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' 3160 3160 15.19 70.02 0.70 0.83
2 A' 3078 3078 7.44 83.80 0.09 0.17
3 A' 3071 3071 14.99 121.71 0.01 0.02
4 A' 2394 2394 9.47 58.58 0.25 0.40
5 A' 1510 1510 5.26 8.54 0.73 0.85
6 A' 1478 1478 4.85 14.29 0.71 0.83
7 A' 1423 1423 1.34 1.77 0.64 0.78
8 A' 1355 1355 3.59 4.20 0.58 0.73
9 A' 1100 1100 4.02 3.67 0.12 0.22
10 A' 1032 1032 0.57 4.94 0.48 0.65
11 A' 850 850 0.21 4.97 0.14 0.24
12 A' 558 558 0.93 1.50 0.35 0.51
13 A' 215 215 4.55 2.28 0.72 0.84
14 A" 3163 3163 14.13 23.70 0.75 0.86
15 A" 3123 3123 0.72 90.64 0.75 0.86
16 A" 1503 1503 6.91 15.28 0.75 0.86
17 A" 1293 1293 0.03 5.94 0.75 0.86
18 A" 1119 1119 0.27 0.13 0.75 0.86
19 A" 796 796 4.20 0.36 0.75 0.86
20 A" 405 405 0.62 2.46 0.75 0.86
21 A" 222 222 1.12 0.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16424.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16424.0 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 wB97X-D/6-31G(2df,p)
ABC
0.93406 0.15688 0.14139

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.513 0.561 0.000
C2 0.000 0.812 0.000
C3 -0.769 -0.433 0.000
N4 -1.364 -1.420 0.000
H5 2.045 1.515 0.000
H6 1.813 -0.004 0.885
H7 1.813 -0.004 -0.885
H8 -0.295 1.393 0.880
H9 -0.295 1.393 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53372.48913.49291.09241.09211.09212.17552.1755
C21.53371.46322.61562.16262.17642.17641.09421.0942
C32.48911.46321.15253.42252.76312.76312.08072.0807
N43.49292.61561.15254.49833.58903.58903.13453.1345
H51.09242.16263.42254.49831.77331.77332.50282.5028
H61.09212.17642.76313.58901.77331.77022.52843.0833
H71.09212.17642.76313.58901.77331.77023.08332.5284
H82.17551.09422.08073.13452.50282.52843.08331.7591
H92.17551.09422.08073.13452.50283.08332.52841.7591

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 112.287 C1 C2 H8 110.644
C1 C2 H9 110.644 C2 C1 H5 109.733
C2 C1 H6 110.839 C2 C1 H7 110.839
C2 C3 N4 179.358 C3 C2 H8 108.034
C3 C2 H9 108.034 H5 C1 H6 108.538
H5 C1 H7 108.538 H6 C1 H7 108.285
H8 C2 H9 106.999
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.431      
2 C -0.349      
3 C 0.249      
4 N -0.310      
5 H 0.152      
6 H 0.164      
7 H 0.164      
8 H 0.180      
9 H 0.180      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.268 3.284 0.000 3.991
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.660 -3.727 0.000
y -3.727 -27.066 0.000
z 0.000 0.000 -23.350
Traceless
 xyz
x -1.453 -3.727 0.000
y -3.727 -2.061 0.000
z 0.000 0.000 3.514
Polar
3z2-r27.027
x2-y20.405
xy-3.727
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.508 1.144 0.000
y 1.144 5.920 0.000
z 0.000 0.000 4.244


<r2> (average value of r2) Å2
<r2> 87.650
(<r2>)1/2 9.362