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

using model chemistry: HF/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at HF/aug-cc-pVQZ
 hartrees
Energy at 0K-171.035450
Energy at 298.15K 
HF Energy-171.035450
Nuclear repulsion energy103.784235
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 HF/aug-cc-pVQZ
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' 3245 2948 30.04 65.70 0.65 0.79
2 A' 3199 2907 6.43 134.17 0.06 0.12
3 A' 3178 2887 21.95 149.67 0.01 0.01
4 A' 2582 2346 18.78 81.38 0.12 0.22
5 A' 1621 1473 4.81 1.78 0.71 0.83
6 A' 1599 1453 4.01 7.66 0.74 0.85
7 A' 1544 1402 0.62 0.59 0.28 0.43
8 A' 1473 1339 6.29 2.04 0.38 0.55
9 A' 1185 1076 3.90 4.63 0.12 0.21
10 A' 1069 971 1.20 6.44 0.41 0.58
11 A' 879 798 2.74 7.20 0.08 0.14
12 A' 599 545 1.14 1.65 0.18 0.31
13 A' 235 213 6.15 1.94 0.69 0.82
14 A" 3255 2957 28.94 5.58 0.75 0.86
15 A" 3229 2934 0.24 96.14 0.75 0.86
16 A" 1613 1466 6.70 4.86 0.75 0.86
17 A" 1397 1269 0.01 1.94 0.75 0.86
18 A" 1215 1104 0.27 0.02 0.75 0.86
19 A" 850 772 2.63 0.36 0.75 0.86
20 A" 435 395 1.52 1.71 0.75 0.86
21 A" 238 216 1.43 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17320.1 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 15735.3 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 HF/aug-cc-pVQZ
ABC
0.94817 0.15848 0.14287

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.508 0.560 0.000
C2 0.000 0.810 0.000
C3 -0.772 -0.441 0.000
N4 -1.354 -1.405 0.000
H5 2.033 1.506 0.000
H6 1.808 0.002 0.876
H7 1.808 0.002 -0.876
H8 -0.296 1.378 0.871
H9 -0.296 1.378 -0.871

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52892.49043.47211.08151.08111.08112.16402.1640
C21.52891.46972.59592.14882.16502.16501.08151.0815
C32.49041.46971.12623.41432.76002.76002.07242.0724
N43.47212.59591.12624.46603.56983.56983.10243.1024
H51.08152.14883.41434.46601.75501.75502.48962.4896
H61.08112.16502.76003.56981.75501.75262.51333.0612
H71.08112.16502.76003.56981.75501.75263.06122.5133
H82.16401.08152.07243.10242.48962.51333.06121.7427
H92.16401.08152.07243.10242.48963.06122.51331.7427

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 110.823
C1 C2 H9 110.823 C2 C1 H5 109.618
C2 C1 H6 110.932 C2 C1 H7 110.932
C2 C3 N4 179.445 C3 C2 H8 107.674
C3 C2 H9 107.674 H5 C1 H6 108.492
H5 C1 H7 108.492 H6 C1 H7 108.302
H8 C2 H9 107.355
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.759      
2 C -0.367      
3 C 0.345      
4 N -0.637      
5 H 0.305      
6 H 0.253      
7 H 0.253      
8 H 0.304      
9 H 0.304      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.458 3.562 0.000 4.327
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.652 -4.016 0.000
y -4.016 -28.084 0.000
z 0.000 0.000 -24.051
Traceless
 xyz
x -1.584 -4.016 0.000
y -4.016 -2.232 0.000
z 0.000 0.000 3.817
Polar
3z2-r27.633
x2-y20.432
xy-4.016
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.150 1.011 0.000
y 1.011 6.315 0.000
z 0.000 0.000 4.841


<r2> (average value of r2) Å2
<r2> 87.436
(<r2>)1/2 9.351