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

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-171.029408
Energy at 298.15K 
HF Energy-171.029408
Nuclear repulsion energy103.748922
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/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3248 2944 30.51 69.44 0.66 0.80
2 A' 3202 2902 6.65 131.06 0.07 0.13
3 A' 3180 2882 22.63 137.95 0.01 0.02
4 A' 2587 2344 17.24 66.35 0.18 0.31
5 A' 1621 1469 5.07 2.58 0.72 0.84
6 A' 1599 1450 3.94 9.95 0.74 0.85
7 A' 1543 1399 0.61 0.82 0.15 0.26
8 A' 1473 1335 5.86 1.72 0.42 0.59
9 A' 1185 1074 3.93 3.78 0.13 0.24
10 A' 1069 969 1.29 7.12 0.41 0.58
11 A' 879 797 2.79 6.55 0.11 0.20
12 A' 601 544 1.05 2.13 0.29 0.45
13 A' 236 214 5.91 2.50 0.73 0.84
14 A" 3258 2953 29.65 5.75 0.75 0.86
15 A" 3232 2930 0.18 105.11 0.75 0.86
16 A" 1613 1462 6.75 7.18 0.75 0.86
17 A" 1396 1266 0.02 3.03 0.75 0.86
18 A" 1216 1102 0.25 0.01 0.75 0.86
19 A" 850 771 2.57 0.33 0.75 0.86
20 A" 437 396 1.32 2.75 0.75 0.86
21 A" 239 216 1.38 0.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17331.4 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 15709.2 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/Def2TZVPP
ABC
0.94767 0.15838 0.14279

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.509 0.560 0.000
C2 0.000 0.810 0.000
C3 -0.772 -0.441 0.000
N4 -1.354 -1.406 0.000
H5 2.033 1.507 0.000
H6 1.808 0.002 0.877
H7 1.808 0.002 -0.877
H8 -0.296 1.378 0.872
H9 -0.296 1.378 -0.872

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52922.49083.47321.08201.08161.08162.16452.1645
C21.52921.46992.59682.14952.16562.16561.08201.0820
C32.49081.46991.12693.41522.76062.76062.07312.0731
N43.47322.59681.12694.46763.57103.57103.10363.1036
H51.08202.14953.41524.46761.75581.75582.49032.4903
H61.08162.16562.76063.57101.75581.75342.51403.0622
H71.08162.16562.76063.57101.75581.75343.06222.5140
H82.16451.08202.07313.10362.49032.51403.06221.7435
H92.16451.08202.07313.10362.49033.06222.51401.7435

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 112.283 C1 C2 H8 110.818
C1 C2 H9 110.818 C2 C1 H5 109.622
C2 C1 H6 110.931 C2 C1 H7 110.931
C2 C3 N4 179.464 C3 C2 H8 107.682
C3 C2 H9 107.682 H5 C1 H6 108.489
H5 C1 H7 108.489 H6 C1 H7 108.305
H8 C2 H9 107.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.164      
2 C 0.086      
3 C -0.168      
4 N -0.133      
5 H 0.070      
6 H 0.071      
7 H 0.071      
8 H 0.084      
9 H 0.084      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.446 3.546 0.000 4.308
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.656 -4.005 0.000
y -4.005 -28.069 0.000
z 0.000 0.000 -24.059
Traceless
 xyz
x -1.592 -4.005 0.000
y -4.005 -2.211 0.000
z 0.000 0.000 3.804
Polar
3z2-r27.607
x2-y20.413
xy-4.005
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.818 1.069 0.000
y 1.069 6.111 0.000
z 0.000 0.000 4.542


<r2> (average value of r2) Å2
<r2> 87.478
(<r2>)1/2 9.353