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 C3H4N2 (1H-Imidazole)

using model chemistry: QCISD(T)/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(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-225.850428
Energy at 298.15K 
HF Energy-224.896863
Nuclear repulsion energy162.865728
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(T)/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVTZ
ABC
0.32409 0.31195 0.15895

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.107 0.000
C2 -1.091 0.284 0.000
C3 1.122 0.300 0.000
N4 -0.746 -0.988 0.000
C5 0.638 -0.985 0.000
H6 -0.012 2.112 0.000
H7 -2.100 0.665 0.000
H8 2.120 0.704 0.000
H9 1.201 -1.905 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36621.38172.22402.18751.00522.14592.15763.2422
C21.36622.21221.31772.14482.12271.07883.23763.1687
C31.38172.21222.26911.37322.13743.24201.07682.2061
N42.22401.31772.26911.38493.18602.13623.32852.1523
C52.18752.14481.37321.38493.16503.19702.24691.0778
H61.00522.12272.13743.18603.16502.54052.55464.1959
H72.14591.07883.24202.13623.19702.54054.21974.1829
H82.15763.23761.07683.32852.24692.55464.21972.7659
H93.24223.16872.20612.15231.07784.19594.18292.7659

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.908 N1 C2 H7 122.285
N1 C3 C5 105.130 N1 C3 H8 122.222
C2 N1 C3 107.223 C2 N1 H6 126.365
C2 N4 C5 105.022 C3 N1 H6 126.412
C3 C5 N4 110.716 C3 C5 H9 127.935
N4 C2 H7 125.807 N4 C5 H9 121.349
C5 C3 H8 132.648
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability