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

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-38.784007
Energy at 298.15K-38.789925
HF Energy-38.106484
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 MP2/CEP-31G*
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' 3675 3490 91.79      
2 A' 3303 3136 0.66      
3 A' 3284 3118 3.26      
4 A' 3276 3110 1.87      
5 A' 1550 1471 5.37      
6 A' 1492 1417 6.14      
7 A' 1469 1394 12.04      
8 A' 1370 1301 2.37      
9 A' 1281 1216 3.80      
10 A' 1180 1120 1.04      
11 A' 1157 1098 11.32      
12 A' 1062 1008 17.29      
13 A' 1055 1002 31.04      
14 A' 908 862 2.21      
15 A' 892 846 6.49      
16 A" 855 812 0.14      
17 A" 822 780 70.49      
18 A" 734 696 111.49      
19 A" 688 653 27.93      
20 A" 625 593 0.05      
21 A" 529 502 45.15      

Unscaled Zero Point Vibrational Energy (zpe) 15602.4 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 14812.9 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 MP2/CEP-31G*
ABC
0.31244 0.30409 0.15411

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.130 0.754 0.000
C2 1.132 0.315 0.000
H3 1.282 -1.924 0.000
C4 0.674 -1.020 0.000
H5 -1.508 -1.695 0.000
C6 -0.753 -0.907 0.000
N7 -1.167 0.393 0.000
H8 -0.051 2.114 0.000
N9 0.000 1.096 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.09002.80912.29524.38513.32733.31632.56992.1572
C21.09002.24401.41163.31792.24672.30022.15281.3754
H32.80912.24401.08942.79862.27513.37094.25193.2807
C42.29521.41161.08942.28331.43152.32033.21642.2207
H54.38513.31792.79862.28331.09102.11584.07793.1722
C63.32732.24672.27511.43151.09101.36393.10112.1397
N73.31632.30023.37092.32032.11581.36392.05091.3621
H82.56992.15284.25193.21644.07793.10112.05091.0190
N92.15721.37543.28072.22073.17222.13971.36211.0190

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 132.703 H1 C2 N9 121.655
C2 C4 H3 127.121 C2 C4 C6 104.415
C2 N9 N7 114.333 C2 N9 H8 127.451
H3 C4 C6 128.464 C4 C2 N9 105.642
C4 C6 H5 129.193 C4 C6 N7 112.182
H5 C6 N7 118.624 C6 N7 N9 103.428
N7 N9 H8 118.216
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability