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All results from a given calculation for C3H3N2 (imidazolyl radical)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-225.171076
Energy at 298.15K-225.175500
HF Energy-224.276628
Nuclear repulsion energy152.687885
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-pVTZ
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 3245 3078        
2 A1 3235 3069        
3 A1 1447 1372        
4 A1 1310 1243        
5 A1 1151 1092        
6 A1 991 940        
7 A1 908 862        
8 A2 873 829        
9 A2 542 514        
10 B1 863 819        
11 B1 782 741        
12 B1 520 493        
13 B2 3223 3058        
14 B2 1527 1448        
15 B2 1297 1231        
16 B2 1190 1129        
17 B2 1002 950        
18 B2 782 742        

Unscaled Zero Point Vibrational Energy (zpe) 12443.8 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 11804.2 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)/cc-pVTZ
ABC
0.35455 0.30421 0.16373

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.097
N2 0.000 1.171 0.373
N3 0.000 -1.171 0.373
C4 0.000 0.737 -0.877
C5 0.000 -0.737 -0.877
H6 0.000 0.000 2.177
H7 0.000 1.402 -1.728
H8 0.000 -1.402 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37711.37712.10672.10671.08043.15433.1543
N21.37712.34241.32252.28072.15152.11373.3223
N31.37712.34242.28071.32252.15153.32232.1137
C42.10671.32252.28071.47383.14161.08102.3027
C52.10672.28071.32251.47383.14162.30271.0810
H61.08042.15152.15153.14163.14164.14994.1499
H73.15432.11373.32231.08102.30274.14992.8049
H83.15433.32232.11372.30271.08104.14992.8049

picture of imidazolyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 102.565 C1 N3 C5 102.565
N2 C1 N3 116.528 N2 C1 H6 121.736
N2 C4 C5 109.172 N2 C4 H7 122.827
N3 C1 H6 121.736 N3 C5 C4 109.172
N3 C5 H8 122.827 C4 C5 H8 128.002
C5 C4 H7 128.002
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability