return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HSEh1PBE/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 HSEh1PBE/3-21G
 hartrees
Energy at 0K-224.700227
Energy at 298.15K-224.706330
HF Energy-224.700227
Nuclear repulsion energy161.610433
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 HSEh1PBE/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' 3663 3528 98.45      
2 A' 3338 3215 0.03      
3 A' 3312 3191 0.87      
4 A' 3306 3185 2.26      
5 A' 1555 1498 15.43      
6 A' 1459 1405 12.02      
7 A' 1415 1363 8.48      
8 A' 1371 1321 3.43      
9 A' 1268 1222 2.07      
10 A' 1165 1122 3.81      
11 A' 1145 1103 19.87      
12 A' 1079 1040 5.91      
13 A' 1006 969 17.61      
14 A' 962 926 3.51      
15 A' 943 908 20.14      
16 A" 961 926 0.50      
17 A" 896 863 13.86      
18 A" 797 767 92.53      
19 A" 692 667 50.10      
20 A" 664 640 7.27      
21 A" 616 593 83.87      

Unscaled Zero Point Vibrational Energy (zpe) 15805.5 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 15225.4 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 HSEh1PBE/3-21G
ABC
0.31623 0.30907 0.15630

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.073 0.628 0.000
C2 1.086 0.302 0.000
H3 1.202 -1.847 0.000
C4 0.631 -0.980 0.000
H5 -1.417 -1.669 0.000
C6 -0.740 -0.880 0.000
N7 -1.103 0.386 0.000
H8 0.008 2.048 0.000
N9 0.000 1.069 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.03912.62382.15974.17793.19193.18522.50602.1191
C21.03912.15271.36073.18612.17582.19082.05151.3290
H32.62382.15271.03852.62512.16993.20974.07383.1536
C42.15971.36071.03852.16061.37482.20743.09092.1432
H54.17793.18612.62512.16061.03932.07903.98043.0825
C63.19192.17582.16991.37481.03931.31723.02182.0845
N73.18522.19083.20972.20742.07901.31721.99861.2972
H82.50602.05154.07383.09093.98043.02181.99860.9792
N92.11911.32903.15362.14323.08252.08451.29720.9792

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 127.805 H1 C2 N9 126.543
C2 C4 H3 127.078 C2 C4 C6 105.385
C2 N9 N7 113.067 C2 N9 H8 124.748
H3 C4 C6 127.537 C4 C2 N9 105.651
C4 C6 H5 126.449 C4 C6 N7 110.149
H5 C6 N7 123.401 C6 N7 N9 105.748
N7 N9 H8 122.185
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.248      
2 C 0.121      
3 H 0.215      
4 C -0.387      
5 H 0.239      
6 C 0.050      
7 N -0.305      
8 H 0.366      
9 N -0.547      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.185 0.938 0.000 2.378
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.264 2.608 0.000
y 2.608 -21.384 0.000
z 0.000 0.000 -32.110
Traceless
 xyz
x -2.517 2.608 0.000
y 2.608 9.303 0.000
z 0.000 0.000 -6.786
Polar
3z2-r2-13.572
x2-y2-7.880
xy2.608
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.279 0.330 0.000
y 0.330 6.609 0.000
z 0.000 0.000 1.811


<r2> (average value of r2) Å2
<r2> 80.940
(<r2>)1/2 8.997