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

using model chemistry: MP2=FULL/aug-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/aug-cc-pVQZ
 hartrees
Energy at 0K-171.885976
Energy at 298.15K 
HF Energy-171.031443
Nuclear repulsion energy103.333844
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-pVQZ
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/aug-cc-pVQZ
ABC
0.93188 0.15893 0.14290

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.499 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 1.789 -0.011 0.878
H7 1.789 -0.011 -0.878
H8 -0.289 1.394 0.874
H9 -0.289 1.394 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.52232.46313.47061.08411.08401.08402.16042.1604
C21.52231.45292.61752.14892.15842.15841.08631.0863
C32.46311.45291.16483.39352.72992.72992.06772.0677
N43.47062.61751.16484.47433.55473.55473.13593.1359
H51.08412.14893.39354.47431.76071.76072.48922.4892
H61.08402.15842.72993.55471.76071.75682.50853.0600
H71.08402.15842.72993.55471.76071.75683.06002.5085
H82.16041.08632.06773.13592.48922.50853.06001.7480
H92.16041.08632.06773.13592.48923.06002.50851.7480

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 111.742 C1 C2 H8 110.722
C1 C2 H9 110.722 C2 C1 H5 109.931
C2 C1 H6 110.691 C2 C1 H7 110.691
C2 C3 N4 178.690 C3 C2 H8 108.174
C3 C2 H9 108.174 H5 C1 H6 108.604
H5 C1 H7 108.604 H6 C1 H7 108.256
H8 C2 H9 107.141
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability