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

using model chemistry: QCISD/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 QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-171.746810
Energy at 298.15K 
HF Energy-171.023034
Nuclear repulsion energy102.923786
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 QCISD/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD/aug-cc-pVTZ
ABC
0.93106 0.15680 0.14123

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.564 0.000
C2 0.000 0.818 0.000
C3 -0.768 -0.434 0.000
N4 -1.360 -1.427 0.000
H5 2.044 1.514 0.000
H6 1.807 -0.001 0.883
H7 1.807 -0.001 -0.883
H8 -0.295 1.393 0.879
H9 -0.295 1.393 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53142.48723.49291.08971.08951.08952.17252.1725
C21.53141.46902.62502.15952.17152.17151.09061.0906
C32.48721.46901.15603.42102.75622.75622.08152.0815
N43.49292.62501.15604.49853.58343.58343.13963.1396
H51.08972.15953.42104.49851.76941.76942.50242.5024
H61.08952.17152.75623.58341.76941.76622.52253.0768
H71.08952.17152.75623.58341.76941.76623.07682.5225
H82.17251.09062.08153.13962.50242.52253.07681.7571
H92.17251.09062.08153.13962.50243.07682.52251.7571

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 111.962 C1 C2 H8 110.776
C1 C2 H9 110.776 C2 C1 H5 109.797
C2 C1 H6 110.768 C2 C1 H7 110.768
C2 C3 N4 179.267 C3 C2 H8 107.910
C3 C2 H9 107.910 H5 C1 H6 108.571
H5 C1 H7 108.571 H6 C1 H7 108.300
H8 C2 H9 107.325
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability