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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: CCSD=FULL/TZVP

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=FULL/TZVP
 hartrees
Energy at 0K-225.732225
Energy at 298.15K-225.738161
HF Energy-224.863601
Nuclear repulsion energy160.709788
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=FULL/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3267 3095 10.58      
2 A' 3241 3071 8.16      
3 A' 3092 2929 3.42      
4 A' 1686 1597 36.77      
5 A' 1600 1516 10.59      
6 A' 1452 1376 12.84      
7 A' 1361 1290 21.51      
8 A' 1345 1275 8.47      
9 A' 1311 1242 6.21      
10 A' 1046 991 59.05      
11 A' 1016 963 6.15      
12 A' 960 909 2.27      
13 A' 895 848 5.69      
14 A' 886 839 6.97      
15 A" 3136 2972 2.85      
16 A" 1176 1115 0.40      
17 A" 1027 973 15.67      
18 A" 951 901 0.04      
19 A" 766 726 5.24      
20 A" 558 529 22.12      
21 A" 353 334 4.70      

Unscaled Zero Point Vibrational Energy (zpe) 15562.6 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 14745.5 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD=FULL/TZVP
ABC
0.32098 0.29254 0.15755

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.202 0.350 0.000
C2 0.000 1.136 0.000
N3 1.115 0.511 0.000
C4 0.737 -0.901 0.000
C5 -0.764 -0.856 0.000
H6 -0.080 2.213 0.000
H7 1.140 -1.401 0.884
H8 1.140 -1.401 -0.884
H9 -1.425 -1.713 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43662.32242.30781.28322.17533.05533.05532.0744
C21.43661.27792.16652.13381.08012.91872.91873.1853
N32.32241.27791.46172.32342.07962.10652.10653.3756
C42.30782.16651.46171.50173.21971.09241.09242.3095
C51.28322.13382.32341.50173.14472.16892.16891.0819
H62.17531.08012.07963.21973.14473.91583.91584.1498
H73.05532.91872.10651.09242.16893.91581.76712.7314
H83.05532.91872.10651.09242.16893.91581.76712.7314
H92.07443.18533.37562.30951.08194.14982.73142.7314

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.524 N1 C2 H6 118.933
N1 C5 C4 111.687 N1 C5 H9 122.351
C2 N1 C5 103.211 C2 N3 C4 104.323
N3 C2 H6 123.542 N3 C4 C5 103.255
N3 C4 H7 110.290 N3 C4 H8 110.290
C4 C5 H9 125.963 C5 C4 H7 112.508
C5 C4 H8 112.508 H7 C4 H8 107.958
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability