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

using model chemistry: MP2=FULL/3-21G

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=FULL/3-21G
 hartrees
Energy at 0K-224.036553
Energy at 298.15K-224.042554
HF Energy-223.543177
Nuclear repulsion energy160.262726
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=FULL/3-21G
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' 3602 3439 69.62      
2 A' 3329 3179 0.97      
3 A' 3308 3159 1.98      
4 A' 3304 3154 1.33      
5 A' 1516 1447 22.07      
6 A' 1458 1392 5.40      
7 A' 1398 1335 13.39      
8 A' 1324 1264 6.46      
9 A' 1250 1193 10.91      
10 A' 1163 1111 1.57      
11 A' 1088 1039 23.81      
12 A' 1083 1034 12.82      
13 A' 1031 984 9.53      
14 A' 954 911 2.84      
15 A' 908 867 9.58      
16 A" 849 810 6.69      
17 A" 817 780 36.53      
18 A" 734 701 34.44      
19 A" 680 649 2.53      
20 A" 656 627 38.51      
21 A" 612 584 125.74      

Unscaled Zero Point Vibrational Energy (zpe) 15531.9 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 14829.9 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=FULL/3-21G
ABC
0.31229 0.30286 0.15375

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.126 0.000
C2 -1.116 0.291 0.000
C3 1.137 0.302 0.000
N4 -0.760 -1.008 0.000
C5 0.660 -0.997 0.000
H6 -0.000 2.139 0.000
H7 -2.125 0.668 0.000
H8 2.138 0.702 0.000
H9 1.223 -1.915 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.39371.40392.26482.22331.01302.17422.17933.2776
C21.39372.25301.34692.19432.15841.07733.27953.2153
C31.40392.25302.30501.38412.16033.28281.07742.2190
N42.26481.34692.30501.41993.23682.16163.36392.1804
C52.22332.19431.38411.41993.20493.24532.25141.0767
H61.01302.15842.16033.23683.20492.58452.57624.2345
H72.17421.07733.28282.16163.24532.58454.26324.2288
H82.17933.27951.07743.36392.25142.57624.26322.7719
H93.27763.21532.21902.18041.07674.23454.22882.7719

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 111.448 N1 C2 H7 122.744
N1 C3 C5 105.773 N1 C3 H8 122.320
C2 N1 C3 107.286 C2 N1 H6 126.767
C2 N4 C5 104.921 C3 N1 H6 125.947
C3 C5 N4 110.572 C3 C5 H9 128.340
N4 C2 H7 125.808 N4 C5 H9 121.088
C5 C3 H8 131.906
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability