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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-222.284908
Energy at 298.15K-222.290545
HF Energy-221.978936
Nuclear repulsion energy158.513421
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 MP2/STO-3G
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' 3859 3365 63.69      
2 A' 3586 3126 7.00      
3 A' 3558 3102 8.26      
4 A' 3557 3101 8.85      
5 A' 1633 1424 12.02      
6 A' 1599 1394 9.72      
7 A' 1577 1375 19.99      
8 A' 1419 1237 13.95      
9 A' 1294 1128 1.57      
10 A' 1201 1047 2.70      
11 A' 1184 1032 14.85      
12 A' 1149 1002 4.66      
13 A' 1106 964 3.21      
14 A' 958 836 1.00      
15 A' 922 804 2.77      
16 A" 918 800 0.58      
17 A" 825 719 12.73      
18 A" 794 692 7.70      
19 A" 670 584 3.10      
20 A" 659 574 9.59      
21 A" 436 380 78.44      

Unscaled Zero Point Vibrational Energy (zpe) 16450.7 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 14343.4 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 MP2/STO-3G
ABC
0.30985 0.29281 0.15055

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.137 0.000
C2 -1.119 0.286 0.000
C3 1.145 0.312 0.000
N4 -0.774 -1.041 0.000
C5 0.666 -0.991 0.000
H6 -0.009 2.179 0.000
H7 -2.142 0.686 0.000
H8 2.156 0.733 0.000
H9 1.258 -1.914 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.40551.41102.31102.22961.04262.18872.19343.2998
C21.40552.26351.37082.19452.19491.09863.30503.2382
C31.41102.26352.34731.38782.19493.30771.09562.2287
N42.31101.37082.34731.44073.30982.20313.42502.2110
C52.22962.19451.38781.44073.24123.27062.27871.0963
H61.04262.19492.19493.30983.24122.60392.60314.2847
H72.18871.09863.30772.20313.27062.60394.29804.2797
H82.19343.30501.09563.42502.27872.60314.29802.7956
H93.29983.23822.22872.21101.09634.28474.27972.7956

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 112.687 N1 C2 H7 121.378
N1 C3 C5 105.611 N1 C3 H8 121.592
C2 N1 C3 106.958 C2 N1 H6 126.789
C2 N4 C5 102.588 C3 N1 H6 126.253
C3 C5 N4 112.155 C3 C5 H9 127.183
N4 C2 H7 125.935 N4 C5 H9 120.662
C5 C3 H8 132.796
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability