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

using model chemistry: CISD/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-225.544946
Energy at 298.15K-225.551097
HF Energy-224.805574
Nuclear repulsion energy167.940962
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 CISD/6-311+G(3df,2p)
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 3352 3089 10.36      
2 A1 3193 2943 0.27      
3 A1 1812 1670 28.65      
4 A1 1504 1386 2.95      
5 A1 1468 1353 23.91      
6 A1 1296 1195 2.03      
7 A1 1083 998 0.98      
8 A1 984 907 12.20      
9 A2 1221 1125 0.00      
10 A2 992 914 0.00      
11 A2 570 526 0.00      
12 B1 3238 2985 0.18      
13 B1 1078 993 24.23      
14 B1 882 813 4.44      
15 B1 382 352 37.01      
16 B2 3337 3076 2.84      
17 B2 1881 1734 0.03      
18 B2 1483 1367 37.21      
19 B2 1320 1217 2.56      
20 B2 1133 1045 42.35      
21 B2 971 895 60.66      

Unscaled Zero Point Vibrational Energy (zpe) 16588.7 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 15291.5 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 CISD/6-311+G(3df,2p)
ABC
0.36447 0.31047 0.17312

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.193
N2 0.000 0.997 0.276
N3 0.000 -0.997 0.276
C4 0.000 0.724 -0.934
C5 0.000 -0.724 -0.934
H6 -0.887 0.000 1.813
H7 0.887 0.000 1.813
H8 0.000 1.455 -1.718
H9 0.000 -1.455 -1.718

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35421.35422.24662.24661.08261.08263.25443.2544
N21.35421.99311.24002.10342.03552.03552.04603.1601
N31.35421.99312.10341.24002.03552.03553.16012.0460
C42.24661.24002.10341.44832.97612.97611.07212.3160
C52.24662.10341.24001.44832.97612.97612.31601.0721
H61.08262.03552.03552.97612.97611.77473.92093.9209
H71.08262.03552.03552.97612.97611.77473.92093.9209
H83.25442.04603.16011.07212.31603.92093.92092.9102
H93.25443.16012.04602.31601.07213.92093.92092.9102

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 119.928 C1 N3 C5 119.928
N2 C1 N3 94.763 N2 C1 H6 112.823
N2 C1 H7 112.823 N2 C4 C5 102.690
N2 C4 H8 124.325 N3 C1 H6 112.823
N3 C1 H7 112.823 N3 C5 C4 102.690
N3 C5 H9 124.325 C4 C5 H9 132.985
C5 C4 H8 132.985 H6 C1 H7 110.101
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability