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

using model chemistry: CCSD=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 CCSD=FULL/cc-pVDZ
 hartrees
Energy at 0K-225.571224
Energy at 298.15K-225.577170
HF Energy-224.813302
Nuclear repulsion energy159.665293
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/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' 3256 3256 12.47      
2 A' 3233 3233 8.34      
3 A' 3087 3087 4.11      
4 A' 1689 1689 34.38      
5 A' 1606 1606 10.25      
6 A' 1422 1422 12.53      
7 A' 1338 1338 20.72      
8 A' 1325 1325 8.85      
9 A' 1276 1276 3.96      
10 A' 1048 1048 48.88      
11 A' 1020 1020 12.21      
12 A' 957 957 1.86      
13 A' 888 888 6.27      
14 A' 880 880 11.33      
15 A" 3136 3136 3.33      
16 A" 1171 1171 0.46      
17 A" 1014 1014 14.91      
18 A" 968 968 0.39      
19 A" 768 768 5.07      
20 A" 562 562 20.27      
21 A" 368 368 5.33      

Unscaled Zero Point Vibrational Energy (zpe) 15505.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15505.7 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=FULL/cc-pVDZ
ABC
0.31776 0.28835 0.15563

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.212 0.358 0.000
C2 0.000 1.139 0.000
N3 1.125 0.509 0.000
C4 0.740 -0.905 0.000
C5 -0.769 -0.858 0.000
H6 -0.073 2.230 0.000
H7 1.149 -1.416 0.890
H8 1.149 -1.416 -0.890
H9 -1.441 -1.723 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44212.34192.32491.29412.19153.08423.08422.0929
C21.44211.28952.17362.14001.09372.93972.93973.2041
N32.34191.28951.46482.33542.09762.12112.12113.4007
C42.32492.17361.46481.50973.23881.10501.10502.3298
C51.29412.14002.33541.50973.16562.18642.18641.0954
H62.19151.09372.09763.23883.16563.94763.94764.1828
H73.08422.93972.12111.10502.18643.94761.78042.7557
H83.08422.93972.12111.10502.18643.94761.78042.7557
H92.09293.20413.40072.32981.09544.18282.75572.7557

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 117.930 N1 C2 H6 118.953
N1 C5 C4 111.802 N1 C5 H9 122.088
C2 N1 C5 102.774 C2 N3 C4 104.035
N3 C2 H6 123.117 N3 C4 C5 103.458
N3 C4 H7 110.472 N3 C4 H8 110.472
C4 C5 H9 126.110 C5 C4 H7 112.561
C5 C4 H8 112.561 H7 C4 H8 107.337
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability