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

using model chemistry: MP2/CEP-121G*

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-121G*
 hartrees
Energy at 0K-38.841962
Energy at 298.15K-38.847799
HF Energy-38.119379
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-121G*
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' 3660 3488 84.37      
2 A' 3300 3145 0.99      
3 A' 3283 3128 3.02      
4 A' 3275 3121 1.59      
5 A' 1536 1464 4.51      
6 A' 1492 1421 6.60      
7 A' 1447 1378 11.60      
8 A' 1365 1300 2.90      
9 A' 1277 1217 1.86      
10 A' 1176 1120 1.02      
11 A' 1152 1098 13.01      
12 A' 1063 1013 14.78      
13 A' 1058 1008 30.94      
14 A' 920 877 1.57      
15 A' 904 862 8.59      
16 A" 799 761 8.77      
17 A" 783 746 79.26      
18 A" 694 661 53.51      
19 A" 669 637 49.41      
20 A" 611 582 0.01      
21 A" 477 455 37.58      

Unscaled Zero Point Vibrational Energy (zpe) 15470.7 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 14740.5 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-121G*
ABC
0.31579 0.30786 0.15589

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.116 0.715 0.000
C2 1.119 0.292 0.000
H3 1.248 -1.927 0.000
C4 0.651 -1.024 0.000
H5 -1.512 -1.689 0.000
C6 -0.762 -0.909 0.000
N7 -1.168 0.389 0.000
H8 -0.043 2.098 0.000
N9 0.000 1.084 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08272.78052.27404.35263.30383.30032.56352.1478
C21.08272.22221.39693.29412.23132.28962.14731.3712
H32.78052.22221.08212.77032.25233.34654.22593.2588
C42.27401.39691.08212.26311.41692.30343.19772.2062
H54.35263.29412.77032.26311.08322.10684.06203.1589
C63.30382.23132.25231.41691.08321.36013.09082.1331
N73.30032.28963.34652.30342.10681.36012.04571.3593
H82.56352.14734.22593.19774.06203.09082.04571.0144
N92.14781.37123.25882.20623.15892.13311.35931.0144

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 132.602 H1 C2 N9 121.715
C2 C4 H3 126.913 C2 C4 C6 104.927
C2 N9 N7 113.975 C2 N9 H8 127.709
H3 C4 C6 128.159 C4 C2 N9 105.683
C4 C6 H5 129.212 C4 C6 N7 112.076
H5 C6 N7 118.712 C6 N7 N9 103.338
N7 N9 H8 118.316
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability