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

using model chemistry: CCSD=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 CCSD=FULL/6-31G*
 hartrees
Energy at 0K-225.543590
Energy at 298.15K-225.549538
HF Energy-224.794954
Nuclear repulsion energy160.288977
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 CCSD=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' 3261 3097 13.40      
2 A' 3238 3075 8.47      
3 A' 3086 2931 2.38      
4 A' 1701 1616 34.01      
5 A' 1619 1538 10.36      
6 A' 1479 1404 13.38      
7 A' 1358 1289 22.82      
8 A' 1347 1280 7.98      
9 A' 1309 1244 3.86      
10 A' 1055 1002 57.19      
11 A' 1024 973 7.81      
12 A' 974 925 2.02      
13 A' 894 849 6.40      
14 A' 887 842 10.63      
15 A" 3129 2972 2.89      
16 A" 1193 1133 0.25      
17 A" 1031 980 13.56      
18 A" 964 915 0.02      
19 A" 779 739 6.29      
20 A" 567 538 24.31      
21 A" 374 355 6.27      

Unscaled Zero Point Vibrational Energy (zpe) 15633.3 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 14848.5 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 CCSD=FULL/6-31G*
ABC
0.31933 0.29135 0.15683

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.205 0.356 0.000
C2 0.000 1.138 0.000
N3 1.119 0.507 0.000
C4 0.735 -0.904 0.000
C5 -0.765 -0.856 0.000
H6 -0.074 2.222 0.000
H7 1.146 -1.409 0.885
H8 1.146 -1.409 -0.885
H9 -1.433 -1.715 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43672.32932.31401.28972.18193.07043.07042.0835
C21.43671.28472.17032.13591.08642.92972.92973.1926
N32.32931.28471.46202.32572.08912.11062.11063.3839
C42.31402.17031.46201.50173.22881.09851.09852.3155
C51.28972.13592.32571.50173.15462.17752.17751.0879
H62.18191.08642.08913.22883.15463.93123.93124.1647
H73.07042.92972.11061.09852.17753.93121.77012.7438
H83.07042.92972.11061.09852.17753.93121.77012.7438
H92.08353.19263.38392.31551.08794.16472.74382.7438

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 117.615 N1 C2 H6 119.058
N1 C5 C4 111.770 N1 C5 H9 122.173
C2 N1 C5 103.018 C2 N3 C4 104.209
N3 C2 H6 123.327 N3 C4 C5 103.388
N3 C4 H7 110.226 N3 C4 H8 110.226
C4 C5 H9 126.057 C5 C4 H7 112.823
C5 C4 H8 112.823 H7 C4 H8 107.350
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability