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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: B2PLYP=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-224.615294
Energy at 298.15K-224.621162
HF Energy-224.444497
Nuclear repulsion energy157.688398
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/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 A' 3297 3138 8.08      
2 A' 3261 3104 4.86      
3 A' 3111 2961 0.02      
4 A' 1546 1472 21.00      
5 A' 1505 1433 15.09      
6 A' 1446 1376 5.78      
7 A' 1309 1246 12.65      
8 A' 1300 1238 4.97      
9 A' 1254 1194 14.14      
10 A' 980 933 40.69      
11 A' 932 887 3.65      
12 A' 893 850 5.07      
13 A' 832 792 9.73      
14 A' 794 756 16.13      
15 A" 3158 3006 0.27      
16 A" 1187 1130 0.05      
17 A" 1014 965 20.69      
18 A" 966 919 0.02      
19 A" 777 739 13.24      
20 A" 573 545 19.17      
21 A" 382 363 11.67      

Unscaled Zero Point Vibrational Energy (zpe) 15255.9 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 14523.6 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/3-21G
ABC
0.30666 0.28252 0.15128

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.134 0.536 0.000
C2 0.780 -0.886 0.000
N3 -0.490 -1.130 0.000
C4 -1.175 0.199 0.000
C5 0.000 1.176 0.000
H6 1.558 -1.632 0.000
H7 -1.810 0.303 0.885
H8 -1.810 0.303 -0.885
H9 -0.080 2.253 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.46542.32632.33301.30172.20883.08263.08262.1023
C21.46541.29302.23582.20431.07762.98412.98413.2543
N32.32631.29301.49532.35722.10832.14012.14013.4074
C42.33302.23581.49531.52783.28931.09431.09432.3272
C51.30172.20432.35721.52783.21062.19552.19551.0799
H62.20881.07762.10833.28933.21063.98363.98364.2155
H73.08262.98412.14011.09432.19553.98361.77032.7525
H83.08262.98412.14011.09432.19553.98361.77032.7525
H92.10233.25433.40742.32721.07994.21552.75252.7525

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 114.845 N1 C2 H6 119.815
N1 C5 C4 110.833 N1 C5 H9 123.682
C2 N1 C5 105.464 C2 N3 C4 106.391
N3 C2 H6 125.341 N3 C4 C5 102.467
N3 C4 H7 110.512 N3 C4 H8 110.512
C4 C5 H9 125.484 C5 C4 H7 112.669
C5 C4 H8 112.669 H7 C4 H8 107.969
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability