return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD/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 CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-171.745187
Energy at 298.15K 
HF Energy-171.023213
Nuclear repulsion energy102.964612
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 CCSD/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD/aug-cc-pVTZ
ABC
0.93143 0.15693 0.14134

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.563 0.000
C2 0.000 0.818 0.000
C3 -0.768 -0.434 0.000
N4 -1.360 -1.426 0.000
H5 2.044 1.513 0.000
H6 1.806 -0.002 0.883
H7 1.806 -0.002 -0.883
H8 -0.295 1.393 0.878
H9 -0.295 1.393 -0.878

Atom - Atom Distances (Å)
  C1 C2 C3 N4 H5 H6 H7 H8 H9
C11.53132.48683.49141.08951.08931.08932.17222.1722
C21.53131.46872.62352.15912.17122.17121.09041.0904
C32.48681.46871.15483.42032.75572.75572.08112.0811
N43.49142.62351.15484.49673.58183.58183.13813.1381
H51.08952.15913.42034.49671.76911.76912.50192.5019
H61.08932.17122.75573.58181.76911.76592.52213.0762
H71.08932.17122.75573.58181.76911.76593.07622.5221
H82.17221.09042.08113.13812.50192.52213.07621.7568
H92.17221.09042.08113.13812.50193.07622.52211.7568

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 111.960 C1 C2 H8 110.776
C1 C2 H9 110.776 C2 C1 H5 109.790
C2 C1 H6 110.764 C2 C1 H7 110.764
C2 C3 N4 179.261 C3 C2 H8 107.910
C3 C2 H9 107.910 H5 C1 H6 108.577
H5 C1 H7 108.577 H6 C1 H7 108.304
H8 C2 H9 107.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability