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

using model chemistry: MP2/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/daug-cc-pVTZ
 hartrees
Energy at 0K-171.724076
Energy at 298.15K 
HF Energy-171.020652
Nuclear repulsion energy102.860062
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/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' 3181 3181 11.54 61.24 0.69 0.82
2 A' 3098 3098 5.59 93.39 0.07 0.13
3 A' 3086 3086 11.98 198.46 0.00 0.01
4 A' 2193 2193 0.10 63.95 0.15 0.26
5 A' 1525 1525 4.88 2.58 0.74 0.85
6 A' 1493 1493 5.24 7.14 0.70 0.83
7 A' 1424 1424 1.49 0.60 0.31 0.47
8 A' 1355 1355 3.12 2.18 0.39 0.56
9 A' 1105 1105 3.25 6.13 0.10 0.19
10 A' 1038 1038 0.41 3.96 0.45 0.62
11 A' 852 852 0.06 6.71 0.05 0.10
12 A' 534 534 0.52 1.09 0.13 0.23
13 A' 203 203 4.06 1.70 0.71 0.83
14 A" 3184 3184 9.99 19.28 0.75 0.86
15 A" 3146 3146 0.10 75.80 0.75 0.86
16 A" 1519 1519 7.39 4.67 0.75 0.86
17 A" 1303 1303 0.00 1.75 0.75 0.86
18 A" 1123 1123 0.51 0.11 0.75 0.86
19 A" 793 793 2.59 0.30 0.75 0.86
20 A" 375 375 0.28 0.91 0.75 0.86
21 A" 224 224 1.07 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16376.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16376.6 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/daug-cc-pVTZ
ABC
0.92133 0.15757 0.14161

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.506 0.556 0.000
C2 0.000 0.823 0.000
C3 -0.767 -0.421 0.000
N4 -1.356 -1.432 0.000
H5 2.048 1.499 0.000
H6 1.795 -0.011 0.882
H7 1.795 -0.011 -0.882
H8 -0.290 1.401 0.878
H9 -0.290 1.401 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52942.47363.48521.08801.08781.08782.16962.1696
C21.52941.46112.63172.15702.16702.16701.08991.0899
C32.47361.46111.17083.40732.74002.74002.07742.0774
N43.48522.63171.17084.49283.56783.56783.15173.1517
H51.08802.15703.40734.49281.76731.76732.49912.4991
H61.08782.16702.74003.56781.76731.76382.51783.0717
H71.08782.16702.74003.56781.76731.76383.07172.5178
H82.16961.08992.07743.15172.49912.51783.07171.7554
H92.16961.08992.07743.15172.49913.07172.51781.7554

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 111.597 C1 C2 H8 110.740
C1 C2 H9 110.740 C2 C1 H5 109.848
C2 C1 H6 110.658 C2 C1 H7 110.658
C2 C3 N4 178.605 C3 C2 H8 108.165
C3 C2 H9 108.165 H5 C1 H6 108.639
H5 C1 H7 108.639 H6 C1 H7 108.340
H8 C2 H9 107.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability