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

using model chemistry: MP2=FULL/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-171.878239
Energy at 298.15K 
HF Energy-171.031201
Nuclear repulsion energy103.340749
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/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/cc-pVQZ
ABC
0.93268 0.15886 0.14285

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.500 0.555 0.000
C2 0.000 0.817 0.000
C3 -0.763 -0.420 0.000
N4 -1.351 -1.425 0.000
H5 2.039 1.495 0.000
H6 1.790 -0.009 0.878
H7 1.790 -0.009 -0.878
H8 -0.289 1.394 0.873
H9 -0.289 1.394 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52222.46403.47121.08361.08341.08342.15982.1598
C21.52221.45352.61762.14862.15822.15821.08581.0858
C32.46401.45351.16423.39402.73112.73112.06822.0682
N43.47122.61761.16424.47443.55593.55593.13613.1361
H51.08362.14863.39404.47441.75951.75952.48832.4883
H61.08342.15822.73113.55591.75951.75562.50833.0591
H71.08342.15822.73113.55591.75951.75563.05912.5083
H82.15981.08582.06823.13612.48832.50833.05911.7467
H92.15981.08582.06823.13612.48833.05912.50831.7467

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 111.778 C1 C2 H8 110.703
C1 C2 H9 110.703 C2 C1 H5 109.947
C2 C1 H6 110.720 C2 C1 H7 110.720
C2 C3 N4 178.683 C3 C2 H8 108.198
C3 C2 H9 108.198 H5 C1 H6 108.577
H5 C1 H7 108.577 H6 C1 H7 108.233
H8 C2 H9 107.093
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability