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: MP4=FULL/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at MP4=FULL/6-311G**
 hartrees
Energy at 0K-225.120109
Energy at 298.15K-225.124418
HF Energy-224.250829
Nuclear repulsion energy153.270928
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 MP4=FULL/6-311G**
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 3259 3134        
2 A1 3241 3116        
3 A1 1479 1422        
4 A1 1361 1309        
5 A1 1184 1139        
6 A1 1029 990        
7 A1 923 887        
8 A2 955 918        
9 A2 578 556        
10 B1 911 876        
11 B1 853 821        
12 B1 528 508        
13 B2 3227 3102        
14 B2 1622 1560        
15 B2 1295 1246        
16 B2 1207 1161        
17 B2 982 944        
18 B2 428 411        

Unscaled Zero Point Vibrational Energy (zpe) 12532.5 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 12050.0 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 MP4=FULL/6-311G**
ABC
0.35855 0.30598 0.16509

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.090
N2 0.000 1.171 0.370
N3 0.000 -1.171 0.370
C4 0.000 0.729 -0.870
C5 0.000 -0.729 -0.870
H6 0.000 0.000 2.175
H7 0.000 1.394 -1.729
H8 0.000 -1.394 -1.729

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37471.37472.09082.09081.08503.14493.1449
N21.37472.34261.31652.26902.15142.11113.3149
N31.37472.34262.26901.31652.15143.31492.1111
C42.09081.31652.26901.45793.13061.08672.2904
C52.09082.26901.31651.45793.13062.29041.0867
H61.08502.15142.15143.13063.13064.14544.1454
H73.14492.11113.31491.08672.29044.14542.7883
H83.14493.31492.11112.29041.08674.14542.7883

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 101.934 C1 N3 C5 101.934
N2 C1 N3 116.867 N2 C1 H6 121.567
N2 C4 C5 109.632 N2 C4 H7 122.628
N3 C1 H6 121.567 N3 C5 C4 109.632
N3 C5 H8 122.628 C4 C5 H8 127.740
C5 C4 H7 127.740
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability