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

using model chemistry: MP2=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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-225.547107
Energy at 298.15K-225.553028
HF Energy-224.801098
Nuclear repulsion energy160.445618
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 MP2=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' 3310 3093 11.88      
2 A' 3292 3076 6.72      
3 A' 3136 2931 0.58      
4 A' 1638 1531 21.67      
5 A' 1558 1455 4.44      
6 A' 1458 1363 16.54      
7 A' 1352 1264 20.10      
8 A' 1334 1247 5.19      
9 A' 1294 1209 6.45      
10 A' 1061 991 50.64      
11 A' 1021 954 6.47      
12 A' 975 911 2.09      
13 A' 882 824 11.03      
14 A' 879 821 6.05      
15 A" 3192 2983 0.63      
16 A" 1180 1102 0.30      
17 A" 1015 948 14.10      
18 A" 956 894 0.18      
19 A" 764 714 6.44      
20 A" 563 526 19.98      
21 A" 357 334 7.42      

Unscaled Zero Point Vibrational Energy (zpe) 15608.6 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 14584.7 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 MP2=FULL/6-31G**
ABC
0.32029 0.29185 0.15715

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.204 0.365 0.000
C2 0.000 1.136 0.000
N3 1.125 0.499 0.000
C4 0.729 -0.903 0.000
C5 -0.765 -0.856 0.000
H6 -0.067 2.213 0.000
H7 1.134 -1.407 0.880
H8 1.134 -1.407 -0.880
H9 -1.432 -1.706 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42992.33312.31151.29702.17053.06283.06282.0832
C21.42991.29262.16532.13331.07982.92012.92013.1823
N32.33311.29261.45772.32562.08792.09992.09993.3770
C42.31152.16531.45771.49423.21681.09191.09192.3050
C51.29702.13332.32561.49423.14762.16422.16421.0809
H62.17051.07982.08793.21683.14763.91493.91494.1505
H73.06282.92012.09991.09192.16423.91491.75942.7293
H83.06282.92012.09991.09192.16423.91491.75942.7293
H92.08323.18233.37702.30501.08094.15052.72932.7293

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 117.874 N1 C2 H6 119.073
N1 C5 C4 111.622 N1 C5 H9 122.079
C2 N1 C5 102.838 C2 N3 C4 103.706
N3 C2 H6 123.053 N3 C4 C5 103.960
N3 C4 H7 110.066 N3 C4 H8 110.066
C4 C5 H9 126.299 C5 C4 H7 112.699
C5 C4 H8 112.699 H7 C4 H8 107.345
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability