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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-223.937718
Energy at 298.15K-223.943722
HF Energy-223.434032
Nuclear repulsion energy164.596361
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 QCISD/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 A1 3239 3140 8.53      
2 A1 3080 2985 0.40      
3 A1 1672 1620 31.22      
4 A1 1501 1454 5.73      
5 A1 1362 1320 0.54      
6 A1 1233 1195 4.48      
7 A1 1012 981 19.61      
8 A1 867 841 5.72      
9 A2 1194 1157 0.00      
10 A2 883 855 0.00      
11 A2 561 544 0.00      
12 B1 3126 3029 0.37      
13 B1 1046 1014 18.51      
14 B1 826 801 12.47      
15 B1 365 354 41.74      
16 B2 3223 3124 13.28      
17 B2 1706 1654 0.31      
18 B2 1348 1306 10.12      
19 B2 1276 1237 5.59      
20 B2 1061 1028 28.26      
21 B2 976 946 79.09      

Unscaled Zero Point Vibrational Energy (zpe) 15777.7 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 15291.8 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 QCISD/3-21G
ABC
0.35511 0.29381 0.16600

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.232
N2 0.000 0.999 0.282
N3 0.000 -0.999 0.282
C4 0.000 0.748 -0.962
C5 0.000 -0.748 -0.962
H6 -0.904 0.000 1.850
H7 0.904 0.000 1.850
H8 0.000 1.487 -1.752
H9 0.000 -1.487 -1.752

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37841.37842.31782.31781.09521.09523.33423.3342
N21.37841.99751.26882.14442.06722.06722.09203.2119
N31.37841.99752.14441.26882.06722.06723.21192.0920
C42.31781.26882.14441.49623.04673.04671.08192.3706
C52.31782.14441.26881.49623.04673.04672.37061.0819
H61.09522.06722.06723.04673.04671.80884.00044.0004
H71.09522.06722.06723.04673.04671.80884.00044.0004
H83.33422.09203.21191.08192.37064.00044.00042.9736
H93.33423.21192.09202.37061.08194.00044.00042.9736

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 122.173 C1 N3 C5 122.173
N2 C1 N3 92.867 N2 C1 H6 112.875
N2 C1 H7 112.875 N2 C4 C5 101.393
N2 C4 H8 125.548 N3 C1 H6 112.875
N3 C1 H7 112.875 N3 C5 C4 101.393
N3 C5 H9 125.548 C4 C5 H9 133.058
C5 C4 H8 133.058 H6 C1 H7 111.332
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability