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

using model chemistry: QCISD(T)=FULL/6-31+G**

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(T)=FULL/6-31+G**
 hartrees
Energy at 0K-225.547272
Energy at 298.15K-225.553203
HF Energy-224.737237
Nuclear repulsion energy165.982497
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(T)=FULL/6-31+G**
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 3299 3299        
2 A1 3126 3126        
3 A1 1703 1703        
4 A1 1468 1468        
5 A1 1419 1419        
6 A1 1268 1268        
7 A1 1044 1044        
8 A1 933 933        
9 A2 1160 1160        
10 A2 844 844        
11 A2 511 511        
12 B1 3180 3180        
13 B1 1028 1028        
14 B1 809 809        
15 B1 332 332        
16 B2 3285 3285        
17 B2 1763 1763        
18 B2 1420 1420        
19 B2 1266 1266        
20 B2 1093 1093        
21 B2 929 929        

Unscaled Zero Point Vibrational Energy (zpe) 15939.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15939.2 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(T)=FULL/6-31+G**
ABC
0.36160 0.29948 0.16912

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.214
N2 0.000 0.998 0.284
N3 0.000 -0.998 0.284
C4 0.000 0.728 -0.955
C5 0.000 -0.728 -0.955
H6 -0.896 0.000 1.836
H7 0.896 0.000 1.836
H8 0.000 1.477 -1.733
H9 0.000 -1.477 -1.733

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36361.36362.28782.28781.09071.09073.29583.2958
N21.36361.99511.26792.12472.05102.05102.07283.1923
N31.36361.99512.12471.26792.05102.05103.19232.0728
C42.28781.26792.12471.45703.02063.02061.07942.3387
C52.28782.12471.26791.45703.02063.02062.33871.0794
H61.09072.05102.05103.02063.02061.79113.96493.9649
H71.09072.05102.05103.02063.02061.79113.96493.9649
H83.29582.07283.19231.07942.33873.96493.96492.9543
H93.29583.19232.07282.33871.07943.96493.96492.9543

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 120.734 C1 N3 C5 120.734
N2 C1 N3 94.030 N2 C1 H6 112.904
N2 C1 H7 112.904 N2 C4 C5 102.250
N2 C4 H8 123.833 N3 C1 H6 112.904
N3 C1 H7 112.904 N3 C5 C4 102.250
N3 C5 H9 123.833 C4 C5 H9 133.916
C5 C4 H8 133.916 H6 C1 H7 110.386
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability