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

using model chemistry: QCISD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-224.899374
Energy at 298.15K-224.903791
HF Energy-224.201215
Nuclear repulsion energy152.553592
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/6-31G*
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 3279 3123 3.77      
2 A1 3267 3111 10.25      
3 A1 1495 1424 15.40      
4 A1 1341 1277 50.00      
5 A1 1166 1111 25.52      
6 A1 1021 972 2.39      
7 A1 924 880 3.74      
8 A2 850 810 0.00      
9 A2 564 537 0.00      
10 B1 843 803 1.13      
11 B1 764 727 22.43      
12 B1 527 502 33.45      
13 B2 3254 3099 1.86      
14 B2 1564 1489 12.28      
15 B2 1320 1257 0.00      
16 B2 1209 1151 6.97      
17 B2 1018 969 59.68      
18 B2 804 766 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 12604.4 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 12003.1 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/6-31G*
ABC
0.35376 0.30391 0.16347

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.099
N2 0.000 1.171 0.372
N3 0.000 -1.171 0.372
C4 0.000 0.738 -0.877
C5 0.000 -0.738 -0.877
H6 0.000 0.000 2.184
H7 0.000 1.406 -1.733
H8 0.000 -1.406 -1.733

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37861.37862.10902.10901.08503.16163.1616
N21.37862.34251.32192.28122.15762.11763.3277
N31.37862.34252.28121.32192.15763.32772.1176
C42.10901.32192.28121.47553.14841.08602.3086
C52.10902.28121.32191.47553.14842.30861.0860
H61.08502.15762.15763.14843.14844.16144.1614
H73.16162.11763.32771.08602.30864.16142.8127
H83.16163.32772.11762.30861.08604.16142.8127

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 102.684 C1 N3 C5 102.684
N2 C1 N3 116.342 N2 C1 H6 121.829
N2 C4 C5 109.145 N2 C4 H7 122.855
N3 C1 H6 121.829 N3 C5 C4 109.145
N3 C5 H8 122.855 C4 C5 H8 128.000
C5 C4 H7 128.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability