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

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G(2df,p)
 hartrees
Energy at 0K-171.882441
Energy at 298.15K 
HF Energy-171.882441
Nuclear repulsion energy103.086873
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 HSEh1PBE/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' 3164 3030 12.81 69.98 0.71 0.83
2 A' 3075 2945 16.47 41.36 0.04 0.07
3 A' 3071 2941 3.60 169.70 0.04 0.08
4 A' 2389 2288 10.02 63.60 0.25 0.40
5 A' 1501 1437 5.23 8.41 0.73 0.85
6 A' 1464 1402 4.91 14.71 0.70 0.82
7 A' 1409 1350 1.26 1.87 0.68 0.81
8 A' 1345 1288 3.36 4.66 0.59 0.74
9 A' 1095 1048 3.79 4.08 0.12 0.22
10 A' 1038 994 0.47 3.96 0.54 0.70
11 A' 856 820 0.07 4.79 0.14 0.24
12 A' 558 534 0.98 1.43 0.34 0.51
13 A' 214 205 4.30 2.18 0.72 0.84
14 A" 3167 3033 11.55 28.10 0.75 0.86
15 A" 3114 2982 0.80 86.27 0.75 0.86
16 A" 1492 1429 6.78 15.09 0.75 0.86
17 A" 1284 1230 0.05 5.78 0.75 0.86
18 A" 1109 1062 0.26 0.16 0.75 0.86
19 A" 786 753 4.60 0.36 0.75 0.86
20 A" 408 391 0.51 2.28 0.75 0.86
21 A" 223 213 1.07 0.37 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16380.6 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 15687.7 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 HSEh1PBE/6-31G(2df,p)
ABC
0.93786 0.15730 0.14180

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.562 0.000
C2 0.000 0.809 0.000
C3 -0.767 -0.430 0.000
N4 -1.362 -1.419 0.000
H5 2.042 1.516 0.000
H6 1.812 -0.003 0.885
H7 1.812 -0.003 -0.885
H8 -0.296 1.393 0.878
H9 -0.296 1.393 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52972.48323.48881.09261.09231.09232.17292.1729
C21.52971.45702.61132.16102.17402.17401.09551.0955
C32.48321.45701.15443.41712.75982.75982.07752.0775
N43.48882.61131.15444.49483.58683.58683.13293.1329
H51.09262.16103.41714.49481.77281.77282.50042.5004
H61.09232.17402.75983.58681.77281.76902.52843.0823
H71.09232.17402.75983.58681.77281.76903.08232.5284
H82.17291.09552.07753.13292.50042.52843.08231.7569
H92.17291.09552.07753.13292.50043.08232.52841.7569

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 112.466 C1 C2 H8 110.640
C1 C2 H9 110.640 C2 C1 H5 109.868
C2 C1 H6 110.913 C2 C1 H7 110.913
C2 C3 N4 179.295 C3 C2 H8 108.128
C3 C2 H9 108.128 H5 C1 H6 108.464
H5 C1 H7 108.464 H6 C1 H7 108.139
H8 C2 H9 106.617
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.443      
2 C -0.364      
3 C 0.273      
4 N -0.322      
5 H 0.155      
6 H 0.168      
7 H 0.168      
8 H 0.182      
9 H 0.182      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.247 3.253 0.000 3.953
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.636 -3.680 0.000
y -3.680 -27.033 0.000
z 0.000 0.000 -23.381
Traceless
 xyz
x -1.429 -3.680 0.000
y -3.680 -2.025 0.000
z 0.000 0.000 3.454
Polar
3z2-r26.908
x2-y20.397
xy-3.680
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.544 1.164 0.000
y 1.164 5.941 0.000
z 0.000 0.000 4.233


<r2> (average value of r2) Å2
<r2> 87.458
(<r2>)1/2 9.352