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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: CCSD/TZVP

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/TZVP
 hartrees
Energy at 0K-225.664001
Energy at 298.15K-225.669644
HF Energy-224.885205
Nuclear repulsion energy163.373102
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/TZVP
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' 3715 3546 71.67      
2 A' 3325 3173 1.52      
3 A' 3297 3147 0.70      
4 A' 3296 3145 4.93      
5 A' 1595 1522 12.08      
6 A' 1541 1471 23.63      
7 A' 1474 1406 22.13      
8 A' 1393 1330 7.55      
9 A' 1313 1253 0.69      
10 A' 1174 1120 5.30      
11 A' 1163 1110 5.77      
12 A' 1118 1067 13.65      
13 A' 1094 1045 40.61      
14 A' 954 911 1.82      
15 A' 920 878 5.54      
16 A" 784 748 67.58      
17 A" 763 728 0.12      
18 A" 679 648 11.15      
19 A" 652 622 10.78      
20 A" 585 558 34.04      
21 A" 280 268 71.46      

Unscaled Zero Point Vibrational Energy (zpe) 15557.7 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 14848.2 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/TZVP
ABC
0.32609 0.31402 0.15997

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.105 0.000
C2 -1.086 0.281 0.000
C3 1.118 0.297 0.000
N4 -0.745 -0.983 0.000
C5 0.637 -0.981 0.000
H6 -0.012 2.109 0.000
H7 -2.095 0.660 0.000
H8 2.116 0.698 0.000
H9 1.196 -1.901 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36341.37932.21742.18081.00472.14172.15493.2350
C21.36342.20441.30952.13572.12061.07763.22943.1575
C31.37932.20442.26121.36572.13603.23351.07552.1994
N42.21741.30952.26121.38243.17862.12653.31902.1475
C52.18082.13571.36571.38243.15793.18682.23751.0766
H61.00472.12062.13603.17863.15792.53732.55414.1885
H72.14171.07763.23352.12653.18682.53734.21134.1701
H82.15493.22941.07553.31902.23752.55414.21132.7568
H93.23503.15752.19942.14751.07664.18854.17012.7568

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 112.097 N1 C2 H7 122.222
N1 C3 C5 105.211 N1 C3 H8 122.285
C2 N1 C3 106.978 C2 N1 H6 126.471
C2 N4 C5 104.978 C3 N1 H6 126.551
C3 C5 N4 110.737 C3 C5 H9 128.071
N4 C2 H7 125.681 N4 C5 H9 121.192
C5 C3 H8 132.503
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability