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

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-223.321691
Energy at 298.15K-223.325926
HF Energy-222.913455
Nuclear repulsion energy151.408629
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 CISD/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 3374 3153 0.88      
2 A1 3343 3124 3.99      
3 A1 1450 1355 35.71      
4 A1 1348 1259 39.41      
5 A1 1115 1042 56.31      
6 A1 939 878 6.16      
7 A1 910 850 5.26      
8 A2 961 898 0.00      
9 A2 618 578 0.00      
10 B1 885 827 18.40      
11 B1 835 781 16.69      
12 B1 573 536 45.64      
13 B2 3327 3109 1.98      
14 B2 1525 1425 2.95      
15 B2 1329 1241 0.08      
16 B2 1197 1119 12.31      
17 B2 991 926 49.24      
18 B2 359 335 5.54      

Unscaled Zero Point Vibrational Energy (zpe) 12540.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 11717.4 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 CISD/3-21G*
ABC
0.34538 0.30073 0.16076

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.133
N2 0.000 1.175 0.363
N3 0.000 -1.175 0.363
C4 0.000 0.748 -0.884
C5 0.000 -0.748 -0.884
H6 0.000 0.000 2.205
H7 0.000 1.402 -1.738
H8 0.000 -1.402 -1.738

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.40431.40432.15112.15111.07243.19463.1946
N21.40432.34941.31802.29222.18462.11323.3248
N31.40432.34942.29221.31802.18463.32482.1132
C42.15111.31802.29221.49703.17851.07522.3139
C52.15112.29221.31801.49703.17852.31391.0752
H61.07242.18462.18463.17853.17854.18484.1848
H73.19462.11323.32481.07522.31394.18482.8042
H83.19463.32482.11322.31391.07524.18482.8042

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 104.359 C1 N3 C5 104.359
N2 C1 N3 113.546 N2 C1 H6 123.227
N2 C4 C5 108.868 N2 C4 H7 123.696
N3 C1 H6 123.227 N3 C5 C4 108.868
N3 C5 H8 123.696 C4 C5 H8 127.436
C5 C4 H7 127.436
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability