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

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-225.554905
Energy at 298.15K-225.560781
HF Energy-224.792380
Nuclear repulsion energy159.492271
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 MP4/6-31G*
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' 3235 3089        
2 A' 3213 3068        
3 A' 3064 2926        
4 A' 1621 1547        
5 A' 1536 1467        
6 A' 1458 1392        
7 A' 1330 1270        
8 A' 1317 1257        
9 A' 1283 1225        
10 A' 1033 986        
11 A' 999 954        
12 A' 957 913        
13 A' 873 833        
14 A' 868 829        
15 A" 3110 2969        
16 A" 1169 1116        
17 A" 1005 959        
18 A" 930 888        
19 A" 756 722        
20 A" 556 531        
21 A" 363 347        

Unscaled Zero Point Vibrational Energy (zpe) 15338.0 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 14644.7 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 MP4/6-31G*
ABC
0.31649 0.28833 0.15528

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.212 0.364 0.000
C2 0.000 1.142 0.000
N3 1.129 0.505 0.000
C4 0.735 -0.909 0.000
C5 -0.769 -0.860 0.000
H6 -0.071 2.229 0.000
H7 1.147 -1.415 0.887
H8 1.147 -1.415 -0.887
H9 -1.440 -1.719 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44042.34562.32651.30152.18623.08473.08472.0956
C21.44041.29652.17892.14461.08892.93942.93943.2032
N32.34561.29651.46802.33812.10022.11512.11513.3983
C42.32652.17891.46801.50513.23961.10091.10092.3212
C51.30152.14462.33811.50513.16642.18292.18291.0903
H62.18621.08892.10023.23963.16643.94283.94284.1786
H73.08472.93942.11511.10092.18293.94281.77372.7514
H83.08472.93942.11511.10092.18293.94281.77372.7514
H92.09563.20323.39832.32121.09034.17862.75142.7514

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 117.875 N1 C2 H6 118.966
N1 C5 C4 111.774 N1 C5 H9 122.119
C2 N1 C5 102.797 C2 N3 C4 103.858
N3 C2 H6 123.159 N3 C4 C5 103.695
N3 C4 H7 110.025 N3 C4 H8 110.025
C4 C5 H9 126.106 C5 C4 H7 112.869
C5 C4 H8 112.869 H7 C4 H8 107.340
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability