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

using model chemistry: QCISD(T)/TZVP

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)/TZVP
 hartrees
Energy at 0K-225.044278
Energy at 298.15K-225.048526
HF Energy-224.266247
Nuclear repulsion energy152.499293
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)/TZVP
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 3266 3145        
2 A1 3251 3131        
3 A1 1441 1388        
4 A1 1317 1268        
5 A1 1146 1104        
6 A1 988 952        
7 A1 914 880        
8 A2 702 676        
9 A2 522 502        
10 B1 750 722        
11 B1 716 690        
12 B1 484 466        
13 B2 3239 3120        
14 B2 1528 1472        
15 B2 1308 1260        
16 B2 1199 1155        
17 B2 998 961        
18 B2 763 735        

Unscaled Zero Point Vibrational Energy (zpe) 12264.5 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 11813.2 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)/TZVP
ABC
0.35361 0.30345 0.16331

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.100
N2 0.000 1.172 0.372
N3 0.000 -1.172 0.372
C4 0.000 0.738 -0.877
C5 0.000 -0.738 -0.877
H6 0.000 0.000 2.181
H7 0.000 1.405 -1.730
H8 0.000 -1.405 -1.730

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37981.37982.11072.11071.08093.15943.1594
N21.37982.34451.32272.28302.15532.11483.3259
N31.37982.34452.28301.32272.15533.32592.1148
C42.11071.32272.28301.47703.14611.08222.3069
C52.11072.28301.32271.47703.14612.30691.0822
H61.08092.15532.15533.14613.14614.15544.1554
H73.15942.11483.32591.08222.30694.15542.8104
H83.15943.32592.11482.30691.08224.15542.8104

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 102.689 C1 N3 C5 102.689
N2 C1 N3 116.335 N2 C1 H6 121.832
N2 C4 C5 109.143 N2 C4 H7 122.825
N3 C1 H6 121.832 N3 C5 C4 109.143
N3 C5 H8 122.825 C4 C5 H8 128.032
C5 C4 H7 128.032
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability