return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-225.012541
Energy at 298.15K-225.016920
HF Energy-224.230628
Nuclear repulsion energy151.460766
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 CCSD(T)=FULL/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 3249 3155        
2 A1 3240 3147        
3 A1 1444 1402        
4 A1 1301 1263        
5 A1 1143 1110        
6 A1 988 959        
7 A1 898 872        
8 A2 843 819        
9 A2 536 521        
10 B1 850 826        
11 B1 758 737        
12 B1 514 500        
13 B2 3226 3133        
14 B2 1514 1471        
15 B2 1277 1240        
16 B2 1174 1140        
17 B2 991 963        
18 B2 762 740        

Unscaled Zero Point Vibrational Energy (zpe) 12354.6 cm-1
Scaled (by 0.9712) Zero Point Vibrational Energy (zpe) 11998.8 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 CCSD(T)=FULL/aug-cc-pVDZ
ABC
0.34841 0.29983 0.16115

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.107
N2 0.000 1.179 0.375
N3 0.000 -1.179 0.375
C4 0.000 0.742 -0.884
C5 0.000 -0.742 -0.884
H6 0.000 0.000 2.199
H7 0.000 1.416 -1.744
H8 0.000 -1.416 -1.744

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.38791.38792.12482.12481.09163.18363.1836
N21.38792.35881.33302.29762.17142.13283.3512
N31.38792.35882.29761.33302.17143.35122.1328
C42.12481.33302.29761.48473.17071.09292.3238
C52.12482.29761.33301.48473.17072.32381.0929
H61.09162.17142.17143.17073.17074.18954.1895
H73.18362.13283.35121.09292.32384.18952.8327
H83.18363.35122.13282.32381.09294.18952.8327

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 102.673 C1 N3 C5 102.673
N2 C1 N3 116.377 N2 C1 H6 121.812
N2 C4 C5 109.139 N2 C4 H7 122.783
N3 C1 H6 121.812 N3 C5 C4 109.139
N3 C5 H8 122.783 C4 C5 H8 128.078
C5 C4 H7 128.078
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability