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

using model chemistry: MP2=FULL/aug-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/aug-cc-pVTZ
 hartrees
Energy at 0K-171.793800
Energy at 298.15K 
HF Energy-171.021306
Nuclear repulsion energy103.312195
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/aug-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 3025 11.23 60.63 0.69 0.81
2 A' 3106 2955 6.28 69.91 0.09 0.16
3 A' 3098 2947 10.97 219.74 0.00 0.01
4 A' 2226 2118 0.33 65.09 0.15 0.27
5 A' 1530 1455 4.96 2.78 0.74 0.85
6 A' 1492 1420 5.81 6.89 0.70 0.82
7 A' 1430 1360 1.65 0.73 0.31 0.48
8 A' 1359 1293 3.00 2.26 0.42 0.59
9 A' 1108 1054 3.12 6.20 0.12 0.21
10 A' 1050 999 0.40 3.22 0.50 0.67
11 A' 862 820 0.04 6.46 0.06 0.11
12 A' 539 512 0.54 1.08 0.14 0.25
13 A' 208 198 4.15 1.69 0.71 0.83
14 A" 3181 3027 9.72 20.03 0.75 0.86
15 A" 3144 2992 0.10 74.72 0.75 0.86
16 A" 1528 1454 7.57 4.62 0.75 0.86
17 A" 1310 1246 0.00 1.79 0.75 0.86
18 A" 1127 1073 0.47 0.10 0.75 0.86
19 A" 789 751 2.82 0.32 0.75 0.86
20 A" 380 361 0.37 0.98 0.75 0.86
21 A" 217 206 1.06 0.26 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16431.1 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 15632.5 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/aug-cc-pVTZ
ABC
0.93416 0.15877 0.14284

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.500 0.555 0.000
C2 0.000 0.815 0.000
C3 -0.762 -0.419 0.000
N4 -1.353 -1.424 0.000
H5 2.037 1.499 0.000
H6 1.791 -0.010 0.880
H7 1.791 -0.010 -0.880
H8 -0.286 1.394 0.875
H9 -0.286 1.394 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52232.46353.47291.08571.08551.08552.15842.1584
C21.52231.45052.61612.14882.15922.15921.08751.0875
C32.46351.45051.16583.39362.73172.73172.06872.0687
N43.47292.61611.16584.47663.55853.55853.13763.1376
H51.08572.14883.39364.47661.76391.76392.48462.4846
H61.08552.15922.73173.55851.76391.75992.50683.0601
H71.08552.15922.73173.55851.76391.75993.06012.5068
H82.15841.08752.06873.13762.48462.50683.06011.7502
H92.15841.08752.06873.13762.48463.06012.50681.7502

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 111.901 C1 C2 H8 110.477
C1 C2 H9 110.477 C2 C1 H5 109.826
C2 C1 H6 110.660 C2 C1 H7 110.660
C2 C3 N4 178.755 C3 C2 H8 108.338
C3 C2 H9 108.338 H5 C1 H6 108.661
H5 C1 H7 108.661 H6 C1 H7 108.315
H8 C2 H9 107.153
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability