return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CID/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 CID/6-31G
 hartrees
Energy at 0K-225.139494
Energy at 298.15K-225.145604
HF Energy-224.707697
Nuclear repulsion energy161.932734
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 CID/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' 3795 3549 74.05      
2 A' 3384 3164 2.17      
3 A' 3366 3148 2.74      
4 A' 3356 3139 1.53      
5 A' 1627 1521 20.96      
6 A' 1554 1453 16.40      
7 A' 1505 1407 25.72      
8 A' 1410 1318 11.02      
9 A' 1332 1245 1.66      
10 A' 1214 1135 1.10      
11 A' 1162 1086 7.75      
12 A' 1145 1071 17.26      
13 A' 1104 1032 40.40      
14 A' 986 923 3.06      
15 A' 956 894 8.03      
16 A" 882 825 6.68      
17 A" 843 788 27.07      
18 A" 759 709 37.90      
19 A" 693 648 8.00      
20 A" 663 620 93.91      
21 A" 635 593 108.42      

Unscaled Zero Point Vibrational Energy (zpe) 16182.7 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 15134.1 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 CID/6-31G
ABC
0.31731 0.31097 0.15705

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.112 0.000
C2 -1.106 0.290 0.000
C3 1.128 0.296 0.000
N4 -0.750 -0.986 0.000
C5 0.651 -0.992 0.000
H6 -0.005 2.114 0.000
H7 -2.116 0.661 0.000
H8 2.129 0.694 0.000
H9 1.203 -1.915 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37801.39222.22822.20211.00192.16402.16973.2572
C21.37802.23441.32462.17492.13021.07633.26003.1927
C31.39222.23442.27491.37362.14203.26521.07652.2127
N42.22821.32462.27491.40183.18822.13943.33362.1632
C52.20212.17491.37361.40183.17413.22332.24131.0757
H61.00192.13022.14203.18823.17412.56282.56374.2061
H72.16401.07633.26522.13943.22332.56284.24554.2015
H82.16973.26001.07653.33362.24132.56374.24552.7679
H93.25723.19272.21272.16321.07574.20614.20152.7679

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 111.055 N1 C2 H7 123.231
N1 C3 C5 105.527 N1 C3 H8 122.500
C2 N1 C3 107.525 C2 N1 H6 126.313
C2 N4 C5 105.794 C3 N1 H6 126.162
C3 C5 N4 110.098 C3 C5 H9 128.808
N4 C2 H7 125.713 N4 C5 H9 121.093
C5 C3 H8 131.973
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability