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

using model chemistry: MP2=FULL/daug-cc-pVTZ

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/daug-cc-pVTZ
 hartrees
Energy at 0K-171.797613
Energy at 298.15K 
HF Energy-171.021567
Nuclear repulsion energy103.287768
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/daug-cc-pVTZ
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' 3180 3180 11.23 60.74 0.68 0.81
2 A' 3107 3107 6.69 60.59 0.10 0.19
3 A' 3101 3101 10.47 229.22 0.00 0.01
4 A' 2221 2221 0.29 64.80 0.15 0.26
5 A' 1530 1530 4.98 2.74 0.74 0.85
6 A' 1499 1499 5.68 6.88 0.70 0.82
7 A' 1427 1427 1.69 0.68 0.30 0.46
8 A' 1363 1363 2.94 2.31 0.41 0.58
9 A' 1109 1109 3.37 6.06 0.11 0.20
10 A' 1049 1049 0.40 3.53 0.47 0.64
11 A' 861 861 0.04 6.37 0.06 0.11
12 A' 536 536 0.46 1.02 0.13 0.23
13 A' 203 203 4.13 1.67 0.71 0.83
14 A" 3184 3184 9.59 18.60 0.75 0.86
15 A" 3146 3146 0.07 75.80 0.75 0.86
16 A" 1526 1526 7.59 4.63 0.75 0.86
17 A" 1312 1312 0.00 1.74 0.75 0.86
18 A" 1130 1130 0.47 0.10 0.75 0.86
19 A" 794 794 2.74 0.30 0.75 0.86
20 A" 378 378 0.35 0.92 0.75 0.86
21 A" 220 220 1.07 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16436.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16436.9 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/daug-cc-pVTZ
ABC
0.92661 0.15912 0.14295

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/daug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.499 0.551 0.000
C2 0.000 0.819 0.000
C3 -0.766 -0.416 0.000
N4 -1.350 -1.425 0.000
H5 2.041 1.492 0.000
H6 1.787 -0.016 0.880
H7 1.787 -0.016 -0.880
H8 -0.284 1.398 0.875
H9 -0.284 1.398 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52322.46273.46731.08551.08541.08542.15972.1597
C21.52321.45302.61842.14882.15982.15981.08741.0874
C32.46271.45301.16573.39332.72982.72982.07112.0711
N43.46732.61841.16574.47253.55023.55023.14183.1418
H51.08552.14883.39334.47251.76361.76362.48572.4857
H61.08542.15982.72983.55021.76361.76032.50743.0609
H71.08542.15982.72983.55021.76361.76033.06092.5074
H82.15971.08742.07113.14182.48572.50743.06091.7510
H92.15971.08742.07113.14182.48573.06092.50741.7510

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 111.657 C1 C2 H8 110.527
C1 C2 H9 110.527 C2 C1 H5 109.769
C2 C1 H6 110.658 C2 C1 H7 110.658
C2 C3 N4 178.305 C3 C2 H8 108.373
C3 C2 H9 108.373 H5 C1 H6 108.663
H5 C1 H7 108.663 H6 C1 H7 108.373
H8 C2 H9 107.241
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability