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

using model chemistry: CCD/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 CCD/6-31G
 hartrees
Energy at 0K-225.182878
Energy at 298.15K-225.188780
HF Energy-224.665881
Nuclear repulsion energy157.304583
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 CCD/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' 3270 3137 7.54      
2 A' 3233 3102 6.07      
3 A' 3064 2940 1.23      
4 A' 1618 1553 15.58      
5 A' 1554 1491 3.21      
6 A' 1492 1431 15.15      
7 A' 1320 1266 15.01      
8 A' 1306 1253 1.89      
9 A' 1299 1246 7.37      
10 A' 992 952 34.91      
11 A' 951 913 6.42      
12 A' 934 896 1.30      
13 A' 855 820 15.81      
14 A' 842 808 4.34      
15 A" 3111 2985 2.78      
16 A" 1170 1122 0.17      
17 A" 1031 989 17.52      
18 A" 921 883 0.28      
19 A" 780 748 12.76      
20 A" 565 542 23.31      
21 A" 390 374 8.26      

Unscaled Zero Point Vibrational Energy (zpe) 15347.4 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 14725.8 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 CCD/6-31G
ABC
0.30394 0.28272 0.15068

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.149 0.547 0.000
C2 0.778 -0.885 0.000
N3 -0.499 -1.142 0.000
C4 -1.179 0.205 0.000
C5 0.000 1.174 0.000
H6 1.556 -1.642 0.000
H7 -1.817 0.292 0.893
H8 -1.817 0.292 -0.893
H9 -0.071 2.260 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.47942.35962.35301.30952.22603.10853.10852.1033
C21.47941.30292.24042.20191.08482.98672.98673.2578
N32.35961.30291.50842.36922.11502.14232.14233.4282
C42.35302.24041.50841.52623.29991.10131.10132.3343
C51.30952.20192.36921.52623.21742.20892.20891.0877
H62.22601.08482.11503.29993.21743.98933.98934.2272
H73.10852.98672.14231.10132.20893.98931.78642.7785
H83.10852.98672.14231.10132.20893.98931.78642.7785
H92.10333.25783.42822.33431.08774.22722.77852.7785

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 115.861 N1 C2 H6 119.690
N1 C5 C4 111.927 N1 C5 H9 122.391
C2 N1 C5 104.121 C2 N3 C4 105.442
N3 C2 H6 124.449 N3 C4 C5 102.649
N3 C4 H7 109.358 N3 C4 H8 109.358
C4 C5 H9 125.682 C5 C4 H7 113.439
C5 C4 H8 113.439 H7 C4 H8 108.391
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability