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

using model chemistry: MP2/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 MP2/cc-pVQZ
 hartrees
Energy at 0K-171.765061
Energy at 298.15K 
HF Energy-171.030653
Nuclear repulsion energy103.060751
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 MP2/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' 3190 3025 11.07 62.58 0.70 0.82
2 A' 3104 2944 5.69 82.02 0.08 0.15
3 A' 3093 2934 11.25 190.99 0.00 0.01
4 A' 2208 2095 0.04 53.30 0.19 0.32
5 A' 1522 1443 5.15 3.30 0.74 0.85
6 A' 1488 1411 5.33 7.98 0.70 0.82
7 A' 1423 1349 1.64 0.78 0.23 0.37
8 A' 1354 1285 2.94 2.17 0.39 0.56
9 A' 1104 1047 3.28 5.39 0.11 0.20
10 A' 1039 986 0.48 4.00 0.45 0.62
11 A' 855 811 0.05 5.84 0.07 0.13
12 A' 538 510 0.53 1.23 0.19 0.32
13 A' 206 195 3.98 1.96 0.73 0.84
14 A" 3192 3028 9.64 21.13 0.75 0.86
15 A" 3153 2990 0.13 77.39 0.75 0.86
16 A" 1515 1437 7.49 5.84 0.75 0.86
17 A" 1301 1234 0.00 2.19 0.75 0.86
18 A" 1121 1063 0.50 0.09 0.75 0.86
19 A" 792 751 2.79 0.29 0.75 0.86
20 A" 379 360 0.27 1.31 0.75 0.86
21 A" 224 213 1.03 0.41 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16400.7 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 15554.4 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 MP2/cc-pVQZ
ABC
0.92533 0.15813 0.14212

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.503 0.555 0.000
C2 0.000 0.821 0.000
C3 -0.766 -0.421 0.000
N4 -1.354 -1.429 0.000
H5 2.045 1.497 0.000
H6 1.793 -0.011 0.880
H7 1.793 -0.011 -0.880
H8 -0.289 1.398 0.876
H9 -0.289 1.398 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52662.47023.47881.08611.08591.08592.16602.1660
C21.52661.45862.62572.15392.16372.16371.08821.0882
C32.47021.45861.16733.40262.73702.73702.07422.0742
N43.47882.62571.16734.48483.56233.56233.14533.1453
H51.08612.15393.40264.48481.76391.76392.49532.4953
H61.08592.16372.73703.56231.76391.76002.51463.0669
H71.08592.16372.73703.56231.76391.76003.06692.5146
H82.16601.08822.07423.14532.49532.51463.06691.7515
H92.16601.08822.07423.14532.49533.06692.51461.7515

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 111.664 C1 C2 H8 110.743
C1 C2 H9 110.743 C2 C1 H5 109.909
C2 C1 H6 110.700 C2 C1 H7 110.700
C2 C3 N4 178.583 C3 C2 H8 108.179
C3 C2 H9 108.179 H5 C1 H6 108.600
H5 C1 H7 108.600 H6 C1 H7 108.268
H8 C2 H9 107.171
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability