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: MP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-225.629949
Energy at 298.15K-225.635884
HF Energy-224.866412
Nuclear repulsion energy162.880664
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 MP2/6-311G**
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' 3693 3509 73.56      
2 A' 3314 3149 0.98      
3 A' 3290 3126 0.82      
4 A' 3284 3121 3.87      
5 A' 1542 1465 8.18      
6 A' 1514 1438 20.30      
7 A' 1476 1403 14.41      
8 A' 1374 1306 7.79      
9 A' 1280 1217 0.84      
10 A' 1193 1134 3.87      
11 A' 1156 1099 2.66      
12 A' 1108 1052 29.45      
13 A' 1089 1035 20.99      
14 A' 938 891 2.17      
15 A' 900 855 6.83      
16 A" 827 786 14.21      
17 A" 786 747 44.68      
18 A" 701 666 24.44      
19 A" 680 646 0.57      
20 A" 640 608 27.59      
21 A" 512 487 77.87      

Unscaled Zero Point Vibrational Energy (zpe) 15648.8 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 14869.4 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 MP2/6-311G**
ABC
0.32584 0.31058 0.15901

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.105 0.000
C2 -1.091 0.283 0.000
C3 1.120 0.308 0.000
N4 -0.741 -0.994 0.000
C5 0.634 -0.985 0.000
H6 -0.011 2.113 0.000
H7 -2.102 0.664 0.000
H8 2.119 0.716 0.000
H9 1.202 -1.904 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36601.37452.22612.18401.00842.14792.15453.2402
C21.36602.21091.32382.14052.12541.08063.23883.1685
C31.37452.21092.27151.38132.13013.24161.07892.2135
N42.22611.32382.27151.37533.19212.14473.33232.1459
C52.18402.14051.38131.37533.16463.19432.25761.0804
H61.00842.12542.13013.19213.16462.54462.54764.1963
H72.14791.08063.24162.14473.19432.54464.22144.1846
H82.15453.23881.07893.33232.25762.54764.22142.7752
H93.24023.16852.21352.14591.08044.19634.18462.7752

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 111.700 N1 C2 H7 122.353
N1 C3 C5 104.836 N1 C3 H8 122.378
C2 N1 C3 107.557 C2 N1 H6 126.392
C2 N4 C5 104.928 C3 N1 H6 126.052
C3 C5 N4 110.979 C3 C5 H9 127.669
N4 C2 H7 125.947 N4 C5 H9 121.352
C5 C3 H8 132.786
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability