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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-171.750328
Energy at 298.15K-171.744699
HF Energy-170.962216
Nuclear repulsion energy103.289906
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 CBS-Q
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' 3283 3283 30.01 77.09 0.70 0.83
2 A' 3227 3227 7.98 115.96 0.10 0.18
3 A' 3206 3206 24.40 95.37 0.02 0.03
4 A' 2619 2619 16.02 50.70 0.28 0.44
5 A' 1638 1638 4.09 7.58 0.73 0.84
6 A' 1613 1613 3.28 18.28 0.74 0.85
7 A' 1554 1554 0.64 1.87 0.46 0.63
8 A' 1481 1481 5.25 3.35 0.53 0.70
9 A' 1188 1188 4.78 3.79 0.18 0.31
10 A' 1077 1077 1.78 7.83 0.47 0.64
11 A' 886 886 3.17 6.23 0.18 0.30
12 A' 596 596 1.19 2.50 0.45 0.62
13 A' 234 234 6.02 3.06 0.72 0.84
14 A" 3292 3292 31.28 10.16 0.75 0.86
15 A" 3266 3266 0.11 119.42 0.75 0.86
16 A" 1630 1630 5.75 17.97 0.75 0.86
17 A" 1402 1402 0.01 7.25 0.75 0.86
18 A" 1219 1219 0.16 0.07 0.75 0.86
19 A" 851 851 2.91 0.42 0.75 0.86
20 A" 435 435 1.46 4.45 0.75 0.86
21 A" 243 243 1.37 0.62 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17469.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17469.3 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 CBS-Q
ABC
0.91641 0.15485 0.13938

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.514 0.562 0.000
C2 0.000 0.814 0.000
C3 -0.774 -0.442 0.000
N4 -1.360 -1.413 0.000
H5 2.042 1.512 0.000
H6 1.815 0.002 0.880
H7 1.815 0.002 -0.880
H8 -0.295 1.387 0.875
H9 -0.295 1.387 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53432.49823.48711.08671.08621.08622.17162.1716
C21.53431.47492.60942.15802.17452.17451.08651.0865
C32.49821.47491.13463.42732.77042.77042.08292.0829
N43.48712.60941.13464.48663.58593.58593.12103.1210
H51.08672.15803.42734.48661.76251.76252.49832.4983
H61.08622.17452.77043.58591.76251.76062.52413.0741
H71.08622.17452.77043.58591.76251.76063.07412.5241
H82.17161.08652.08293.12102.49832.52413.07411.7490
H92.17161.08652.08293.12102.49833.07412.52411.7490

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 112.221 C1 C2 H8 110.752
C1 C2 H9 110.752 C2 C1 H5 109.655
C2 C1 H6 111.001 C2 C1 H7 111.001
C2 C3 N4 179.436 C3 C2 H8 107.857
C3 C2 H9 107.857 H5 C1 H6 108.412
H5 C1 H7 108.412 H6 C1 H7 108.281
H8 C2 H9 107.203
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability