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: CCSD(T)/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(T)/cc-pVTZ
 hartrees
Energy at 0K-225.832258
Energy at 298.15K 
HF Energy-224.893748
Nuclear repulsion energy163.003909
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(T)/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/cc-pVTZ
ABC
0.32514 0.31200 0.15922

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.106 0.000
C2 -1.089 0.283 0.000
C3 1.120 0.301 0.000
N4 -0.746 -0.989 0.000
C5 0.637 -0.984 0.000
H6 -0.012 2.110 0.000
H7 -2.097 0.663 0.000
H8 2.118 0.704 0.000
H9 1.201 -1.901 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36501.37992.22442.18511.00412.14342.15593.2388
C21.36502.20911.31712.14052.12091.07783.23413.1645
C31.37992.20912.26911.37262.13483.23781.07582.2039
N42.22441.31712.26911.38343.18522.13403.32722.1507
C52.18512.14051.37261.38343.16153.19182.24511.0772
H61.00412.12092.13483.18523.16152.53782.55284.1913
H72.14341.07783.23782.13403.19182.53784.21524.1779
H82.15593.23411.07583.32722.24512.55284.21522.7618
H93.23883.16452.20392.15071.07724.19134.17792.7618

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 112.050 N1 C2 H7 122.225
N1 C3 C5 105.092 N1 C3 H8 122.301
C2 N1 C3 107.178 C2 N1 H6 126.408
C2 N4 C5 104.840 C3 N1 H6 126.415
C3 C5 N4 110.840 C3 C5 H9 127.802
N4 C2 H7 125.725 N4 C5 H9 121.357
C5 C3 H8 132.607
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability