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

using model chemistry: QCISD/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-224.967493
Energy at 298.15K-224.971926
HF Energy-224.231493
Nuclear repulsion energy151.749611
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/aug-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 3270 3167 1.16      
2 A1 3257 3155 9.22      
3 A1 1464 1418 12.21      
4 A1 1313 1272 47.40      
5 A1 1152 1116 21.49      
6 A1 999 967 1.08      
7 A1 909 880 2.80      
8 A2 863 836 0.00      
9 A2 554 537 0.00      
10 B1 858 831 0.39      
11 B1 764 740 24.09      
12 B1 525 509 29.07      
13 B2 3243 3142 0.46      
14 B2 1528 1480 19.98      
15 B2 1290 1250 0.01      
16 B2 1182 1145 5.96      
17 B2 1006 974 54.76      
18 B2 796 771 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 12485.6 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 12094.8 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/aug-cc-pVDZ
ABC
0.34952 0.30109 0.16175

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.106
N2 0.000 1.176 0.374
N3 0.000 -1.176 0.374
C4 0.000 0.743 -0.882
C5 0.000 -0.743 -0.882
H6 0.000 0.000 2.196
H7 0.000 1.416 -1.742
H8 0.000 -1.416 -1.742

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.38461.38462.12232.12231.09023.18053.1805
N21.38462.35121.32892.29332.16812.13023.3458
N31.38462.35122.29331.32892.16813.34582.1302
C42.12231.32892.29331.48583.16661.09192.3236
C52.12232.29331.32891.48583.16662.32361.0919
H61.09022.16812.16813.16663.16664.18504.1850
H73.18052.13023.34581.09192.32364.18502.8312
H83.18053.34582.13022.32361.09194.18502.8312

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 102.891 C1 N3 C5 102.891
N2 C1 N3 116.216 N2 C1 H6 121.892
N2 C4 C5 109.001 N2 C4 H7 122.968
N3 C1 H6 121.892 N3 C5 C4 109.001
N3 C5 H8 122.968 C4 C5 H8 128.031
C5 C4 H7 128.031
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability