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

using model chemistry: CCSD(T)/6-311G*

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)/6-311G*
 hartrees
Energy at 0K-225.633172
Energy at 298.15K-225.639052
HF Energy-224.838049
Nuclear repulsion energy159.676027
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)/6-311G*
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' 3208 3088        
2 A' 3185 3066        
3 A' 3041 2927        
4 A' 1629 1568        
5 A' 1539 1482        
6 A' 1442 1388        
7 A' 1319 1270        
8 A' 1311 1262        
9 A' 1273 1225        
10 A' 1029 991        
11 A' 1001 964        
12 A' 948 912        
13 A' 875 842        
14 A' 869 837        
15 A" 3084 2969        
16 A" 1169 1125        
17 A" 996 959        
18 A" 930 896        
19 A" 749 721        
20 A" 551 531        
21 A" 359 345        

Unscaled Zero Point Vibrational Energy (zpe) 15253.1 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 14682.7 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(T)/6-311G*
ABC
0.31764 0.28843 0.15559

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.211 0.359 0.000
C2 0.000 1.140 0.000
N3 1.126 0.508 0.000
C4 0.738 -0.907 0.000
C5 -0.769 -0.859 0.000
H6 -0.073 2.226 0.000
H7 1.149 -1.411 0.887
H8 1.149 -1.411 -0.887
H9 -1.444 -1.716 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44092.34202.32461.29642.18643.08083.08082.0880
C21.44091.29142.17582.14231.08852.93532.93533.2000
N32.34201.29141.46682.33722.09502.11462.11463.3986
C42.32462.17581.46681.50843.23601.10011.10012.3277
C51.29642.14232.33721.50843.16312.18412.18411.0902
H62.18641.08852.09503.23603.16313.93823.93824.1733
H73.08082.93532.11461.10012.18413.93821.77462.7572
H83.08082.93532.11461.10012.18413.93821.77462.7572
H92.08803.20003.39862.32771.09024.17332.75722.7572

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 117.895 N1 C2 H6 118.967
N1 C5 C4 111.725 N1 C5 H9 121.824
C2 N1 C5 102.874 C2 N3 C4 103.977
N3 C2 H6 123.138 N3 C4 C5 103.530
N3 C4 H7 110.113 N3 C4 H8 110.113
C4 C5 H9 126.451 C5 C4 H7 112.771
C5 C4 H8 112.771 H7 C4 H8 107.523
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability