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: ROMP2/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 ROMP2/cc-pVDZ
 hartrees
Energy at 0K-224.902833
Energy at 298.15K-224.907276
HF Energy-224.203086
Nuclear repulsion energy151.800225
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 ROMP2/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 3291 3291        
2 A1 3275 3275        
3 A1 1592 1592        
4 A1 1325 1325        
5 A1 1159 1159        
6 A1 994 994        
7 A1 899 899        
8 A2 880 880        
9 A2 568 568        
10 B1 827 827        
11 B1 769 769        
12 B1 513 513        
13 B2 3261 3261        
14 B2 1535 1535        
15 B2 1293 1293        
16 B2 1214 1214        
17 B2 1025 1025        
18 B2 833 833        

Unscaled Zero Point Vibrational Energy (zpe) 12626.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12626.3 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 ROMP2/cc-pVDZ
ABC
0.35209 0.29944 0.16182

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.102
N2 0.000 1.181 0.372
N3 0.000 -1.181 0.372
C4 0.000 0.741 -0.878
C5 0.000 -0.741 -0.878
H6 0.000 0.000 2.193
H7 0.000 1.414 -1.740
H8 0.000 -1.414 -1.740

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.38841.38842.11422.11421.09163.17403.1740
N21.38842.36241.32542.29342.17072.12493.3460
N31.38842.36242.29341.32542.17073.34602.1249
C42.11421.32542.29341.48293.15971.09312.3213
C52.11422.29341.32541.48293.15972.32131.0931
H61.09162.17072.17073.15973.15974.17974.1797
H73.17402.12493.34601.09312.32134.17972.8278
H83.17403.34602.12492.32131.09314.17972.8278

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 102.325 C1 N3 C5 102.325
N2 C1 N3 116.594 N2 C1 H6 121.703
N2 C4 C5 109.378 N2 C4 H7 122.656
N3 C1 H6 121.703 N3 C5 C4 109.378
N3 C5 H8 122.656 C4 C5 H8 127.966
C5 C4 H7 127.966
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability