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

using model chemistry: CCSD(T)/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(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-225.554784
Energy at 298.15K-225.560710
HF Energy-224.752332
Nuclear repulsion energy165.144145
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(T)/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 3243 3121        
2 A1 3073 2958        
3 A1 1675 1613        
4 A1 1418 1365        
5 A1 1386 1334        
6 A1 1255 1208        
7 A1 1025 986        
8 A1 917 883        
9 A2 1139 1096        
10 A2 864 832        
11 A2 514 495        
12 B1 3126 3009        
13 B1 998 961        
14 B1 800 770        
15 B1 332 319        
16 B2 3228 3106        
17 B2 1733 1668        
18 B2 1392 1339        
19 B2 1226 1180        
20 B2 1074 1034        
21 B2 919 884        

Unscaled Zero Point Vibrational Energy (zpe) 15668.1 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 15080.6 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(T)/aug-cc-pVDZ
ABC
0.35848 0.29611 0.16750

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.220
N2 0.000 0.998 0.285
N3 0.000 -0.998 0.285
C4 0.000 0.735 -0.960
C5 0.000 -0.735 -0.960
H6 -0.907 0.000 1.848
H7 0.907 0.000 1.848
H8 0.000 1.498 -1.743
H9 0.000 -1.498 -1.743

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36701.36702.30062.30061.10301.10303.31943.3194
N21.36701.99571.27322.13412.06382.06382.08883.2156
N31.36701.99572.13411.27322.06382.06383.21562.0888
C42.30061.27322.13411.46993.04123.04121.09252.3656
C52.30062.13411.27321.46993.04123.04122.36561.0925
H61.10302.06382.06383.04123.04121.81313.99473.9947
H71.10302.06382.06383.04123.04121.81313.99473.9947
H83.31942.08883.21561.09252.36563.99473.99472.9951
H93.31943.21562.08882.36561.09253.99473.99472.9951

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 121.200 C1 N3 C5 121.200
N2 C1 N3 93.768 N2 C1 H6 112.912
N2 C1 H7 112.912 N2 C4 C5 101.916
N2 C4 H8 123.817 N3 C1 H6 112.912
N3 C1 H7 112.912 N3 C5 C4 101.916
N3 C5 H9 123.817 C4 C5 H9 134.267
C5 C4 H8 134.267 H6 C1 H7 110.554
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability