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

using model chemistry: QCISD(T)/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 QCISD(T)/cc-pVDZ
 hartrees
Energy at 0K-224.959586
Energy at 298.15K-224.963980
HF Energy-224.218190
Nuclear repulsion energy151.428737
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 QCISD(T)/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 3252 3100        
2 A1 3239 3087        
3 A1 1458 1390        
4 A1 1303 1242        
5 A1 1144 1091        
6 A1 985 939        
7 A1 901 858        
8 A2 855 815        
9 A2 551 525        
10 B1 846 807        
11 B1 756 721        
12 B1 515 491        
13 B2 3225 3074        
14 B2 1530 1458        
15 B2 1283 1223        
16 B2 1181 1125        
17 B2 998 951        
18 B2 785 748        

Unscaled Zero Point Vibrational Energy (zpe) 12402.5 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 11820.8 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 QCISD(T)/cc-pVDZ
ABC
0.35015 0.29819 0.16104

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/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 1.183 0.376
N3 0.000 -1.183 0.376
C4 0.000 0.744 -0.882
C5 0.000 -0.744 -0.882
H6 0.000 0.000 2.196
H7 0.000 1.418 -1.745
H8 0.000 -1.418 -1.745

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.38801.38802.11812.11811.09443.18053.1805
N21.38802.36621.33192.30092.17102.13393.3564
N31.38802.36622.30091.33192.17103.35642.1339
C42.11811.33192.30091.48763.16621.09572.3281
C52.11812.30091.33191.48763.16622.32811.0957
H61.09442.17102.17103.16623.16624.18864.1886
H73.18052.13393.35641.09572.32814.18862.8364
H83.18053.35642.13392.32811.09574.18862.8364

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 102.271 C1 N3 C5 102.271
N2 C1 N3 116.941 N2 C1 H6 121.529
N2 C4 C5 109.258 N2 C4 H7 122.755
N3 C1 H6 121.529 N3 C5 C4 109.258
N3 C5 H8 122.755 C4 C5 H8 127.987
C5 C4 H7 127.987
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability