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: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-225.533079
Energy at 298.15K-225.539018
HF Energy-224.812382
Nuclear repulsion energy163.164908
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 MP3/6-31G*
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' 3729 3500 74.14      
2 A' 3345 3139 1.64      
3 A' 3319 3115 0.92      
4 A' 3316 3112 5.48      
5 A' 1623 1524 12.61      
6 A' 1571 1474 22.98      
7 A' 1511 1418 24.10      
8 A' 1420 1333 9.55      
9 A' 1322 1241 0.83      
10 A' 1196 1122 8.24      
11 A' 1190 1117 0.74      
12 A' 1139 1069 15.81      
13 A' 1114 1045 37.95      
14 A' 961 902 1.82      
15 A' 924 867 7.06      
16 A" 836 785 7.34      
17 A" 813 763 39.71      
18 A" 715 671 26.12      
19 A" 686 643 5.37      
20 A" 641 602 22.59      
21 A" 493 463 107.08      

Unscaled Zero Point Vibrational Energy (zpe) 15931.3 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 14953.1 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 MP3/6-31G*
ABC
0.32565 0.31299 0.15960

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.107 0.000
C2 -1.088 0.281 0.000
C3 1.120 0.300 0.000
N4 -0.746 -0.986 0.000
C5 0.637 -0.984 0.000
H6 -0.012 2.116 0.000
H7 -2.102 0.661 0.000
H8 2.122 0.702 0.000
H9 1.199 -1.908 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36621.38082.22232.18631.00852.14852.16033.2451
C21.36622.20781.31212.13922.12711.08283.23733.1657
C31.38082.20782.26601.37132.13993.24181.08002.2091
N42.22231.31212.26601.38363.18742.13313.32812.1529
C52.18632.13921.37131.38363.16703.19522.24671.0814
H61.00852.12712.13993.18743.16702.54622.55954.2021
H72.14851.08283.24182.13313.19522.54624.22384.1829
H82.16033.23731.08003.32812.24672.55954.22382.7686
H93.24513.16572.20912.15291.08144.20214.18292.7686

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 112.134 N1 C2 H7 122.211
N1 C3 C5 105.203 N1 C3 H8 122.305
C2 N1 C3 106.972 C2 N1 H6 126.555
C2 N4 C5 105.012 C3 N1 H6 126.473
C3 C5 N4 110.679 C3 C5 H9 128.101
N4 C2 H7 125.654 N4 C5 H9 121.220
C5 C3 H8 132.492
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability