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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: CCSD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/aug-cc-pVDZ
 hartrees
Energy at 0K-225.521140
Energy at 298.15K-225.527125
HF Energy-224.753999
Nuclear repulsion energy165.569995
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/aug-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 A1 3265 3145 10.73      
2 A1 3098 2984 0.46      
3 A1 1725 1662 24.99      
4 A1 1439 1387 1.22      
5 A1 1406 1354 20.28      
6 A1 1268 1222 2.57      
7 A1 1039 1001 0.40      
8 A1 934 900 13.15      
9 A2 1157 1115 0.00      
10 A2 892 860 0.00      
11 A2 529 510 0.00      
12 B1 3150 3035 0.05      
13 B1 1018 981 23.36      
14 B1 819 789 6.35      
15 B1 342 330 33.84      
16 B2 3249 3130 3.28      
17 B2 1781 1716 0.03      
18 B2 1419 1367 37.87      
19 B2 1246 1200 4.33      
20 B2 1088 1048 31.12      
21 B2 931 897 56.46      

Unscaled Zero Point Vibrational Energy (zpe) 15897.5 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 15315.7 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 CCSD/aug-cc-pVDZ
ABC
0.35904 0.29846 0.16835

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.216
N2 0.000 0.998 0.283
N3 0.000 -0.998 0.283
C4 0.000 0.734 -0.955
C5 0.000 -0.734 -0.955
H6 -0.905 0.000 1.843
H7 0.905 0.000 1.843
H8 0.000 1.492 -1.740
H9 0.000 -1.492 -1.740

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36571.36572.29182.29181.10091.10093.31103.3110
N21.36571.99541.26612.12922.06092.06092.08283.2079
N31.36571.99542.12921.26612.06092.06093.20792.0828
C42.29181.26612.12921.46863.03133.03131.09072.3602
C52.29182.12921.26611.46863.03133.03132.36021.0907
H61.10092.06092.06093.03133.03131.80923.98553.9855
H71.10092.06092.06093.03133.03131.80923.98553.9855
H83.31102.08283.20791.09072.36023.98553.98552.9830
H93.31103.20792.08282.36021.09073.98553.98552.9830

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 121.057 C1 N3 C5 121.057
N2 C1 N3 93.867 N2 C1 H6 112.904
N2 C1 H7 112.904 N2 C4 C5 102.009
N2 C4 H8 124.026 N3 C1 H6 112.904
N3 C1 H7 112.904 N3 C5 C4 102.009
N3 C5 H9 124.026 C4 C5 H9 133.965
C5 C4 H8 133.965 H6 C1 H7 110.506
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability