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

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 CS 1A'
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-225.790023
Energy at 298.15K-225.795938
HF Energy-225.618278
Nuclear repulsion energy158.196379
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 A' 3318 3318 6.94      
2 A' 3279 3279 4.42      
3 A' 3098 3098 0.15      
4 A' 1579 1579 25.31      
5 A' 1509 1509 12.34      
6 A' 1461 1461 15.90      
7 A' 1320 1320 19.81      
8 A' 1310 1310 1.68      
9 A' 1278 1278 13.37      
10 A' 993 993 48.04      
11 A' 956 956 3.05      
12 A' 936 936 2.84      
13 A' 861 861 9.64      
14 A' 847 847 13.07      
15 A" 3145 3145 0.91      
16 A" 1170 1170 0.12      
17 A" 1027 1027 16.08      
18 A" 953 953 0.22      
19 A" 781 781 12.32      
20 A" 574 574 23.20      
21 A" 390 390 10.52      

Unscaled Zero Point Vibrational Energy (zpe) 15392.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15392.5 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
0.30758 0.28622 0.15250

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.148 -0.536 0.000
C2 -0.773 0.876 0.000
N3 0.505 1.135 0.000
C4 1.168 -0.206 0.000
C5 0.000 -1.167 0.000
H6 -1.543 1.631 0.000
H7 1.806 -0.301 0.885
H8 1.806 -0.301 -0.885
H9 0.064 -2.246 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.46142.35032.34011.31042.20223.09323.09322.0964
C21.46141.30322.22232.18471.07822.96982.96983.2328
N32.35031.30321.49602.35672.10702.13062.13063.4099
C42.34012.22231.49601.51303.27491.09541.09542.3204
C51.31042.18472.35671.51303.19512.19002.19001.0811
H62.20221.07822.10703.27493.19513.96643.96644.1968
H73.09322.96982.13061.09542.19003.96641.77102.7576
H83.09322.96982.13061.09542.19003.96641.77102.7576
H92.09643.23283.40992.32041.08114.19682.75762.7576

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 116.340 N1 C2 H6 119.485
N1 C5 C4 111.755 N1 C5 H9 122.179
C2 N1 C5 103.900 C2 N3 C4 104.894
N3 C2 H6 124.175 N3 C4 C5 103.111
N3 C4 H7 109.645 N3 C4 H8 109.645
C4 C5 H9 126.067 C5 C4 H7 113.225
C5 C4 H8 113.225 H7 C4 H8 107.877
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability