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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-223.400211
Energy at 298.15K 
HF Energy-222.911019
Nuclear repulsion energy150.540027
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 MP4/3-21G
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 3282 3182        
2 A1 3247 3149        
3 A1 1450 1407        
4 A1 1329 1289        
5 A1 1062 1030        
6 A1 925 897        
7 A1 865 839        
8 A2 1001 970        
9 A2 634 615        
10 B1 910 883        
11 B1 828 803        
12 B1 548 531        
13 B2 3229 3132        
14 B2 1517 1471        
15 B2 1296 1257        
16 B2 1191 1155        
17 B2 965 936        
18 B2 587i 569i        

Unscaled Zero Point Vibrational Energy (zpe) 11845.1 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 11487.4 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 MP4/3-21G
ABC
0.34326 0.29613 0.15898

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.138
N2 0.000 1.191 0.362
N3 0.000 -1.191 0.362
C4 0.000 0.743 -0.885
C5 0.000 -0.743 -0.885
H6 0.000 0.000 2.219
H7 0.000 1.397 -1.749
H8 0.000 -1.397 -1.749

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.42201.42202.15532.15531.08053.20733.2073
N21.42202.38261.32482.30122.20632.12073.3397
N31.42202.38262.30121.32482.20633.33972.1207
C42.15531.32482.30121.48593.19141.08352.3076
C52.15532.30121.32481.48593.19142.30761.0835
H61.08052.20632.20633.19143.19144.20644.2064
H73.20732.12073.33971.08352.30764.20642.7936
H83.20733.33972.12072.30761.08354.20642.7936

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 103.315 C1 N3 C5 103.315
N2 C1 N3 113.806 N2 C1 H6 123.097
N2 C4 C5 109.782 N2 C4 H7 123.101
N3 C1 H6 123.097 N3 C5 C4 109.782
N3 C5 H8 123.101 C4 C5 H8 127.117
C5 C4 H7 127.117
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability