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

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-224.035148
Energy at 298.15K-224.041121
HF Energy-223.520013
Nuclear repulsion energy 
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 QCISD/3-21G
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' 3626 3514 90.35      
2 A' 3273 3172 0.34      
3 A' 3248 3148 4.49      
4 A' 3242 3142 1.58      
5 A' 1538 1490 14.82      
6 A' 1437 1393 14.64      
7 A' 1394 1351 9.21      
8 A' 1354 1313 5.50      
9 A' 1235 1197 2.80      
10 A' 1152 1116 5.73      
11 A' 1098 1064 23.13      
12 A' 1055 1022 1.40      
13 A' 972 942 4.99      
14 A' 951 922 4.89      
15 A' 918 889 21.63      
16 A" 888 861 6.85      
17 A" 854 828 6.46      
18 A" 764 740 90.78      
19 A" 673 652 31.84      
20 A" 643 623 1.38      
21 A" 551 534 97.77      

Unscaled Zero Point Vibrational Energy (zpe) 15432.4 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 14957.1 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 QCISD/3-21G
ABC
0.30966 0.30169 0.15281

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.127 0.735 0.000
C2 1.127 0.321 0.000
H3 1.300 -1.889 0.000
C4 0.689 -0.997 0.000
H5 -1.452 -1.737 0.000
C6 -0.742 -0.921 0.000
N7 -1.194 0.357 0.000
H8 -0.064 2.129 0.000
N9 0.000 1.121 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08212.75112.25144.35023.31323.34272.59712.1621
C21.08212.21691.38953.30022.24492.32162.16491.3820
H32.75112.21691.08082.75612.26013.35594.24293.2780
C42.25141.38951.08082.26541.43352.31933.21552.2269
H54.35023.30022.75612.26541.08172.11004.10783.2055
C63.31322.24492.26011.43351.08171.35513.12432.1721
N73.34272.32163.35592.31932.11001.35512.10161.4172
H82.59712.16494.24293.21554.10783.12432.10161.0104
N92.16211.38203.27802.22693.20552.17211.41721.0104

picture of 1H-Pyrazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 130.864 H1 C2 N9 122.200
C2 C4 H3 127.193 C2 C4 C6 105.340
C2 N9 N7 112.069 C2 N9 H8 128.958
H3 C4 C6 127.467 C4 C2 N9 106.936
C4 C6 H5 127.945 C4 C6 N7 112.514
H5 C6 N7 119.542 C6 N7 N9 103.141
N7 N9 H8 118.974
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability