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

using model chemistry: MP2=FULL/6-311+G(3df,2p)

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=FULL/6-311+G(3df,2p)
 hartrees
Energy at 0K-171.792597
Energy at 298.15K 
HF Energy-171.016979
Nuclear repulsion energy103.130661
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=FULL/6-311+G(3df,2p)
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' 3195 3012 11.33 61.80 0.69 0.82
2 A' 3106 2928 5.85 71.34 0.09 0.16
3 A' 3099 2922 11.11 193.67 0.00 0.01
4 A' 2216 2089 0.21 61.38 0.17 0.29
5 A' 1529 1441 5.57 2.66 0.73 0.85
6 A' 1494 1409 5.84 7.10 0.72 0.83
7 A' 1429 1347 1.76 0.81 0.26 0.42
8 A' 1361 1283 2.98 2.24 0.40 0.57
9 A' 1107 1044 3.34 6.22 0.11 0.19
10 A' 1045 985 0.53 3.52 0.48 0.65
11 A' 859 810 0.04 6.18 0.06 0.11
12 A' 543 512 0.56 1.15 0.17 0.29
13 A' 208 196 4.10 1.83 0.72 0.83
14 A" 3197 3014 9.63 21.49 0.75 0.86
15 A" 3155 2974 0.15 73.91 0.75 0.86
16 A" 1522 1434 8.03 4.94 0.75 0.86
17 A" 1303 1228 0.00 1.93 0.75 0.86
18 A" 1123 1058 0.46 0.09 0.75 0.86
19 A" 794 749 2.80 0.33 0.75 0.86
20 A" 385 363 0.30 1.12 0.75 0.86
21 A" 230 217 1.07 0.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16449.1 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 15506.5 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=FULL/6-311+G(3df,2p)
ABC
0.92724 0.15838 0.14237

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.502 0.555 0.000
C2 0.000 0.819 0.000
C3 -0.764 -0.420 0.000
N4 -1.354 -1.427 0.000
H5 2.044 1.496 0.000
H6 1.793 -0.011 0.880
H7 1.793 -0.011 -0.880
H8 -0.290 1.398 0.876
H9 -0.290 1.398 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52522.46683.47631.08621.08611.08612.16512.1651
C21.52521.45602.62292.15322.16322.16321.08861.0886
C32.46681.45601.16713.39952.73492.73492.07272.0727
N43.47632.62291.16714.48243.56143.56143.14303.1430
H51.08622.15323.39954.48241.76331.76332.49462.4946
H61.08612.16322.73493.56141.76331.76022.51453.0668
H71.08612.16322.73493.56141.76331.76023.06682.5145
H82.16511.08862.07273.14302.49462.51453.06681.7512
H92.16511.08862.07273.14302.49463.06682.51451.7512

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 111.652 C1 C2 H8 110.748
C1 C2 H9 110.748 C2 C1 H5 109.948
C2 C1 H6 110.751 C2 C1 H7 110.751
C2 C3 N4 178.736 C3 C2 H8 108.217
C3 C2 H9 108.217 H5 C1 H6 108.531
H5 C1 H7 108.531 H6 C1 H7 108.260
H8 C2 H9 107.095
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability