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

using model chemistry: MP4=FULL/cc-pVTZ

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-pVTZ
 hartrees
Energy at 0K-225.890300
Energy at 298.15K-225.896233
HF Energy-224.872763
Nuclear repulsion energy160.754571
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-pVTZ
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' 3244 3123        
2 A' 3224 3104        
3 A' 3071 2957        
4 A' 1610 1550        
5 A' 1521 1465        
6 A' 1418 1365        
7 A' 1326 1277        
8 A' 1310 1262        
9 A' 1266 1219        
10 A' 1036 997        
11 A' 1000 963        
12 A' 952 917        
13 A' 875 843        
14 A' 872 840        
15 A" 3100 2985        
16 A" 1169 1125        
17 A" 1009 972        
18 A" 970 934        
19 A" 761 733        
20 A" 562 542        
21 A" 369 356        

Unscaled Zero Point Vibrational Energy (zpe) 15332.5 cm-1
Scaled (by 0.9629) Zero Point Vibrational Energy (zpe) 14763.7 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 MP4=FULL/cc-pVTZ
ABC
0.32107 0.29320 0.15772

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.202 0.360 0.000
C2 0.000 1.135 0.000
N3 1.120 0.502 0.000
C4 0.730 -0.902 0.000
C5 -0.763 -0.855 0.000
H6 -0.070 2.210 0.000
H7 1.132 -1.407 0.879
H8 1.132 -1.407 -0.879
H9 -1.426 -1.704 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42992.32612.30731.29182.16833.05613.05612.0767
C21.42991.28672.16382.13101.07672.91812.91813.1775
N32.32611.28671.45702.32062.08132.10152.10153.3691
C42.30732.16381.45701.49333.21251.09051.09052.3005
C51.29182.13102.32061.49333.14172.16012.16011.0780
H62.16831.07672.08133.21253.14173.91093.91094.1423
H73.05612.91812.10151.09052.16013.91091.75822.7210
H83.05612.91812.10151.09052.16013.91091.75822.7210
H92.07673.17753.36912.30051.07804.14232.72102.7210

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 117.702 N1 C2 H6 119.107
N1 C5 C4 111.678 N1 C5 H9 122.142
C2 N1 C5 102.949 C2 N3 C4 103.945
N3 C2 H6 123.191 N3 C4 C5 103.726
N3 C4 H7 110.332 N3 C4 H8 110.332
C4 C5 H9 126.180 C5 C4 H7 112.514
C5 C4 H8 112.514 H7 C4 H8 107.434
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability