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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: MP2=FULL/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-225.719558
Energy at 298.15K-225.725585
HF Energy-224.837503
Nuclear repulsion energy163.702363
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(2df,p)
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' 3724 3500 79.63      
2 A' 3347 3146 0.38      
3 A' 3322 3122 0.54      
4 A' 3320 3120 2.26      
5 A' 1548 1455 9.18      
6 A' 1520 1429 18.67      
7 A' 1480 1391 15.13      
8 A' 1384 1301 9.07      
9 A' 1288 1211 0.68      
10 A' 1203 1131 3.25      
11 A' 1168 1098 2.42      
12 A' 1120 1053 25.34      
13 A' 1096 1030 21.85      
14 A' 943 886 1.46      
15 A' 903 849 8.56      
16 A" 863 811 8.76      
17 A" 811 762 32.25      
18 A" 732 688 18.08      
19 A" 699 657 0.07      
20 A" 664 624 23.92      
21 A" 571 537 79.90      

Unscaled Zero Point Vibrational Energy (zpe) 15853.4 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 14900.6 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 MP2=FULL/6-31G(2df,p)
ABC
0.32890 0.31403 0.16065

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.099 0.000
C2 -1.085 0.283 0.000
C3 1.113 0.305 0.000
N4 -0.737 -0.989 0.000
C5 0.631 -0.981 0.000
H6 -0.011 2.103 0.000
H7 -2.091 0.665 0.000
H8 2.107 0.714 0.000
H9 1.199 -1.895 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.35751.36702.21402.17331.00472.13582.14183.2250
C21.35752.19861.31872.13162.11381.07643.22113.1562
C31.36702.19862.25841.37372.12043.22491.07452.2023
N42.21401.31872.25841.36863.17652.13783.31522.1378
C52.17332.13161.37371.36863.15043.18172.24741.0761
H61.00472.11382.12043.17653.15042.52932.53264.1775
H72.13581.07643.22492.13783.18172.52934.19874.1692
H82.14183.22111.07453.31522.24742.53264.19872.7629
H93.22503.15622.20232.13781.07614.17754.16922.7629

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.634 N1 C2 H7 122.270
N1 C3 C5 104.929 N1 C3 H8 122.168
C2 N1 C3 107.600 C2 N1 H6 126.320
C2 N4 C5 104.960 C3 N1 H6 126.080
C3 C5 N4 110.877 C3 C5 H9 127.625
N4 C2 H7 126.096 N4 C5 H9 121.498
C5 C3 H8 132.904
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability