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: MP4=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4=FULL/cc-pVDZ
 hartrees
Energy at 0K-225.626276
Energy at 298.15K-225.632174
HF Energy-224.831353
Nuclear repulsion energy161.707330
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 MP4=FULL/cc-pVDZ
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' 3671 3543        
2 A' 3299 3184        
3 A' 3271 3157        
4 A' 3268 3154        
5 A' 1544 1490        
6 A' 1510 1457        
7 A' 1460 1409        
8 A' 1362 1314        
9 A' 1265 1221        
10 A' 1165 1124        
11 A' 1138 1098        
12 A' 1089 1051        
13 A' 1071 1034        
14 A' 925 892        
15 A' 890 859        
16 A" 834 805        
17 A" 795 767        
18 A" 707 682        
19 A" 674 650        
20 A" 636 613        
21 A" 485 468        

Unscaled Zero Point Vibrational Energy (zpe) 15528.5 cm-1
Scaled (by 0.9651) Zero Point Vibrational Energy (zpe) 14986.5 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 MP4=FULL/cc-pVDZ
ABC
0.32155 0.30581 0.15674

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.114 0.000
C2 -1.095 0.284 0.000
C3 1.128 0.309 0.000
N4 -0.750 -1.002 0.000
C5 0.639 -0.991 0.000
H6 -0.013 2.128 0.000
H7 -2.116 0.671 0.000
H8 2.136 0.722 0.000
H9 1.213 -1.919 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37441.38622.24512.20011.01412.16152.17183.2669
C21.37442.22291.33042.15162.13881.09173.26063.1901
C31.38622.22292.29021.38872.14773.26361.08972.2293
N42.24511.33042.29021.38923.21572.15873.36212.1671
C52.20012.15161.38871.38923.18663.21672.27541.0913
H61.01412.13882.14773.21573.18662.55862.56804.2289
H72.16151.09173.26362.15873.21672.55864.25194.2172
H82.17183.26061.08973.36212.27542.56804.25192.7980
H93.26693.19012.22932.16711.09134.22894.21722.7980

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 112.195 N1 C2 H7 122.029
N1 C3 C5 104.910 N1 C3 H8 122.155
C2 N1 C3 107.267 C2 N1 H6 126.478
C2 N4 C5 104.562 C3 N1 H6 126.255
C3 C5 N4 111.065 C3 C5 H9 127.631
N4 C2 H7 125.775 N4 C5 H9 121.304
C5 C3 H8 132.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability