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return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for (imidazolyl radical)

using model chemistry: B2PLYP=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at B2PLYP=FULL/6-31G*
 hartrees
Energy at 0K-225.330289
Energy at 298.15K-225.334714
HF Energy-225.099550
Nuclear repulsion energy152.948094
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 B2PLYP=FULL/6-31G*
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 3291 3121 3.44      
2 A1 3280 3111 12.37      
3 A1 1467 1391 15.27      
4 A1 1338 1269 53.50      
5 A1 1176 1115 29.83      
6 A1 1017 965 3.89      
7 A1 922 875 3.06      
8 A2 881 835 0.00      
9 A2 570 540 0.00      
10 B1 873 828 0.68      
11 B1 772 732 18.57      
12 B1 521 494 31.14      
13 B2 3267 3099 1.64      
14 B2 1560 1480 15.75      
15 B2 1318 1250 0.00      
16 B2 1215 1152 6.63      
17 B2 1018 966 69.96      
18 B2 773 733 0.66      

Unscaled Zero Point Vibrational Energy (zpe) 12629.4 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 11977.7 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 B2PLYP=FULL/6-31G*
ABC
0.35564 0.30555 0.16435

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.094
N2 0.000 1.169 0.372
N3 0.000 -1.169 0.372
C4 0.000 0.734 -0.875
C5 0.000 -0.734 -0.875
H6 0.000 0.000 2.177
H7 0.000 1.401 -1.728
H8 0.000 -1.401 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37401.37402.10172.10171.08223.15103.1510
N21.37402.33831.32122.27562.14982.11343.3194
N31.37402.33832.27561.32122.14983.31942.1134
C42.10171.32122.27561.46813.13861.08292.2992
C52.10172.27561.32121.46813.13862.29921.0829
H61.08222.14982.14983.13863.13864.14844.1484
H73.15102.11343.31941.08292.29924.14842.8019
H83.15103.31942.11342.29921.08294.14842.8019

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 102.461 C1 N3 C5 102.461
N2 C1 N3 116.621 N2 C1 H6 121.690
N2 C4 C5 109.228 N2 C4 H7 122.757
N3 C1 H6 121.690 N3 C5 C4 109.228
N3 C5 H8 122.757 C4 C5 H8 128.015
C5 C4 H7 128.015
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability