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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-223.349134
Energy at 298.15K 
HF Energy-222.911317
Nuclear repulsion energy151.510979
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 MP2/3-21G*
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 3337 3174 0.04      
2 A1 3305 3144 10.00      
3 A1 1495 1422 102.11      
4 A1 1352 1286 27.33      
5 A1 1076 1023 58.91      
6 A1 967 920 25.27      
7 A1 890 846 18.12      
8 A2 1056 1004 0.00      
9 A2 655 623 0.00      
10 B1 953 907 23.73      
11 B1 865 823 2.86      
12 B1 553 526 52.49      
13 B2 3287 3127 1.07      
14 B2 1565 1488 9.94      
15 B2 1319 1254 1.17      
16 B2 1215 1156 29.00      
17 B2 988 940 50.84      
18 B2 906i 862i 4.23      

Unscaled Zero Point Vibrational Energy (zpe) 11985.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 11401.4 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 MP2/3-21G*
ABC
0.34721 0.30069 0.16114

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.132
N2 0.000 1.185 0.360
N3 0.000 -1.185 0.360
C4 0.000 0.733 -0.879
C5 0.000 -0.733 -0.879
H6 0.000 0.000 2.208
H7 0.000 1.383 -1.741
H8 0.000 -1.383 -1.741

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.41421.41422.14052.14051.07633.18813.1881
N21.41422.36981.31902.28322.19552.10983.3176
N31.41422.36982.28321.31902.19553.31762.1098
C42.14051.31902.28321.46553.17321.07922.2844
C52.14052.28321.31901.46553.17322.28441.0792
H61.07632.19552.19553.17323.17324.18404.1840
H73.18812.10983.31761.07922.28444.18402.7662
H83.18813.31762.10982.28441.07924.18402.7662

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 103.040 C1 N3 C5 103.040
N2 C1 N3 113.829 N2 C1 H6 123.086
N2 C4 C5 110.046 N2 C4 H7 122.900
N3 C1 H6 123.086 N3 C5 C4 110.046
N3 C5 H8 122.900 C4 C5 H8 127.054
C5 C4 H7 127.054
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability