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

using model chemistry: HSEh1PBE/6-31G*

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*
 hartrees
Energy at 0K-171.870129
Energy at 298.15K 
HF Energy-171.870129
Nuclear repulsion energy102.867895
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*
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' 3175 3020 15.43 75.04 0.72 0.84
2 A' 3091 2939 18.08 67.58 0.02 0.04
3 A' 3085 2934 4.48 146.69 0.06 0.11
4 A' 2398 2281 9.46 59.77 0.29 0.45
5 A' 1531 1456 6.54 10.84 0.74 0.85
6 A' 1497 1423 5.41 18.21 0.71 0.83
7 A' 1440 1369 2.05 2.85 0.66 0.79
8 A' 1368 1301 2.98 5.82 0.62 0.76
9 A' 1108 1054 5.20 3.47 0.16 0.28
10 A' 1044 993 0.62 4.65 0.53 0.69
11 A' 861 819 0.06 4.66 0.18 0.30
12 A' 556 528 1.09 1.97 0.43 0.60
13 A' 214 203 4.12 2.85 0.73 0.84
14 A" 3181 3025 14.36 31.63 0.75 0.86
15 A" 3127 2974 1.37 92.74 0.75 0.86
16 A" 1524 1449 8.30 19.24 0.75 0.86
17 A" 1302 1238 0.06 8.11 0.75 0.86
18 A" 1126 1070 0.26 0.12 0.75 0.86
19 A" 798 758 5.14 0.40 0.75 0.86
20 A" 402 382 0.30 3.48 0.75 0.86
21 A" 227 216 1.01 0.60 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16526.4 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 15716.6 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*
ABC
0.93551 0.15655 0.14116

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.511 0.566 0.000
C2 0.000 0.811 0.000
C3 -0.767 -0.432 0.000
N4 -1.364 -1.426 0.000
H5 2.042 1.522 0.000
H6 1.816 0.002 0.886
H7 1.816 0.002 -0.886
H8 -0.296 1.395 0.880
H9 -0.296 1.395 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53082.48693.49701.09391.09331.09332.17402.1740
C21.53081.46082.61982.16242.17632.17631.09631.0963
C32.48691.46081.15913.42192.76452.76452.08152.0815
N43.49702.61981.15914.50433.59583.59583.14143.1414
H51.09392.16243.42194.50431.77391.77392.50152.5015
H61.09332.17632.76453.59581.77391.77132.52983.0848
H71.09332.17632.76453.59581.77391.77133.08482.5298
H82.17401.09632.08153.14142.50152.52983.08481.7593
H92.17401.09632.08153.14142.50153.08482.52981.7593

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 112.440 C1 C2 H8 110.605
C1 C2 H9 110.605 C2 C1 H5 109.825
C2 C1 H6 110.965 C2 C1 H7 110.965
C2 C3 N4 179.313 C3 C2 H8 108.133
C3 C2 H9 108.133 H5 C1 H6 108.398
H5 C1 H7 108.398 H6 C1 H7 108.207
H8 C2 H9 106.712
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.518      
2 C -0.405      
3 C 0.359      
4 N -0.472      
5 H 0.189      
6 H 0.199      
7 H 0.199      
8 H 0.225      
9 H 0.225      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.234 3.253 0.000 3.946
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.717 -3.690 0.000
y -3.690 -27.159 0.000
z 0.000 0.000 -23.495
Traceless
 xyz
x -1.390 -3.690 0.000
y -3.690 -2.053 0.000
z 0.000 0.000 3.443
Polar
3z2-r26.886
x2-y20.442
xy-3.690
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.205 1.225 0.000
y 1.225 5.773 0.000
z 0.000 0.000 3.962


<r2> (average value of r2) Å2
<r2> 87.832
(<r2>)1/2 9.372