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

using model chemistry: QCISD/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-225.040108
Energy at 298.15K-225.044587
HF Energy-224.223480
Nuclear repulsion energy153.051999
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(2df,p)
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 3290 3117 1.32      
2 A1 3279 3107 7.80      
3 A1 1479 1401 15.47      
4 A1 1335 1265 48.28      
5 A1 1170 1108 25.40      
6 A1 1011 958 1.78      
7 A1 924 876 3.81      
8 A2 901 854 0.00      
9 A2 573 543 0.00      
10 B1 880 834 0.75      
11 B1 789 748 16.94      
12 B1 536 508 29.84      
13 B2 3266 3094 0.47      
14 B2 1555 1473 14.37      
15 B2 1310 1241 0.03      
16 B2 1204 1141 6.46      
17 B2 1016 962 61.30      
18 B2 802 760 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 12660.7 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 11994.7 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(2df,p)
ABC
0.35637 0.30555 0.16451

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.094
N2 0.000 1.168 0.371
N3 0.000 -1.168 0.371
C4 0.000 0.737 -0.874
C5 0.000 -0.737 -0.874
H6 0.000 0.000 2.175
H7 0.000 1.402 -1.726
H8 0.000 -1.402 -1.726

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37321.37322.10152.10151.08043.14993.1499
N21.37322.33501.31742.27532.14842.11073.3170
N31.37322.33502.27531.31742.14843.31702.1107
C42.10151.31742.27531.47393.13631.08132.3026
C52.10152.27531.31741.47393.13632.30261.0813
H61.08042.14842.14843.13633.13634.14544.1454
H73.14992.11073.31701.08132.30264.14542.8040
H83.14993.31702.11072.30261.08134.14542.8040

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 102.694 C1 N3 C5 102.694
N2 C1 N3 116.462 N2 C1 H6 121.769
N2 C4 C5 109.075 N2 C4 H7 122.972
N3 C1 H6 121.769 N3 C5 C4 109.075
N3 C5 H8 122.972 C4 C5 H8 127.953
C5 C4 H7 127.953
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability