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

using model chemistry: QCISD(T)/cc-pVDZ

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)/cc-pVDZ
 hartrees
Energy at 0K-225.509350
Energy at 298.15K-225.515290
HF Energy-224.738915
Nuclear repulsion energy165.382016
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)/cc-pVDZ
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 3246 3094        
2 A1 3091 2946        
3 A1 1707 1627        
4 A1 1429 1362        
5 A1 1392 1327        
6 A1 1267 1208        
7 A1 1030 981        
8 A1 918 875        
9 A2 1146 1092        
10 A2 871 830        
11 A2 517 493        
12 B1 3146 2999        
13 B1 1008 961        
14 B1 808 770        
15 B1 335 320        
16 B2 3230 3079        
17 B2 1760 1678        
18 B2 1410 1343        
19 B2 1234 1176        
20 B2 1084 1033        
21 B2 927 884        

Unscaled Zero Point Vibrational Energy (zpe) 15778.8 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 15038.8 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(T)/cc-pVDZ
ABC
0.35857 0.29765 0.16799

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.215
N2 0.000 0.998 0.285
N3 0.000 -0.998 0.285
C4 0.000 0.735 -0.958
C5 0.000 -0.735 -0.958
H6 -0.905 0.000 1.847
H7 0.905 0.000 1.847
H8 0.000 1.499 -1.741
H9 0.000 -1.499 -1.741

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36431.36432.29382.29381.10371.10373.31473.3147
N21.36431.99521.26962.13182.06302.06302.08683.2151
N31.36431.99522.13181.26962.06302.06303.21512.0868
C42.29381.26962.13181.46983.03753.03751.09452.3675
C52.29382.13181.26961.46983.03753.03752.36751.0945
H61.10372.06302.06303.03753.03751.80953.99283.9928
H71.10372.06302.06303.03753.03751.80953.99283.9928
H83.31472.08683.21511.09452.36753.99283.99282.9985
H93.31473.21512.08682.36751.09453.99283.99282.9985

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 121.071 C1 N3 C5 121.071
N2 C1 N3 93.974 N2 C1 H6 112.996
N2 C1 H7 112.996 N2 C4 C5 101.942
N2 C4 H8 123.765 N3 C1 H6 112.996
N3 C1 H7 112.996 N3 C5 C4 101.942
N3 C5 H9 123.765 C4 C5 H9 134.293
C5 C4 H8 134.293 H6 C1 H7 110.123
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability