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

using model chemistry: MP4=FULL/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=FULL/3-21G
 hartrees
Energy at 0K-223.408334
Energy at 298.15K 
HF Energy-222.911050
Nuclear repulsion energy150.556405
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3282 3213        
2 A1 3247 3178        
3 A1 1451 1420        
4 A1 1329 1301        
5 A1 1062 1040        
6 A1 925 906        
7 A1 865 847        
8 A2 1001 980        
9 A2 634 621        
10 B1 911 892        
11 B1 829 811        
12 B1 548 537        
13 B2 3230 3161        
14 B2 1517 1485        
15 B2 1297 1269        
16 B2 1191 1166        
17 B2 965 945        
18 B2 587i 574i        

Unscaled Zero Point Vibrational Energy (zpe) 11848.9 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 11597.7 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/3-21G
ABC
0.34332 0.29621 0.15902

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/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
C11.42181.42182.15512.15511.08043.20703.2070
N21.42182.38221.32472.30092.20602.12043.3393
N31.42182.38222.30091.32472.20603.33932.1204
C42.15511.32472.30091.48573.19111.08342.3075
C52.15512.30091.32471.48573.19112.30751.0834
H61.08042.20602.20603.19113.19114.20604.2060
H73.20702.12043.33931.08342.30754.20602.7936
H83.20703.33932.12042.30751.08344.20602.7936

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 103.321 C1 N3 C5 103.321
N2 C1 N3 113.803 N2 C1 H6 123.099
N2 C4 C5 109.778 N2 C4 H7 123.096
N3 C1 H6 123.099 N3 C5 C4 109.778
N3 C5 H8 123.096 C4 C5 H8 127.127
C5 C4 H7 127.127
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability