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: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-225.980215
Energy at 298.15K-225.986080
Nuclear repulsion energy162.284758
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 PBEPBE/6-311G*
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' 3588 3550 50.97      
2 A' 3201 3168 2.97      
3 A' 3182 3149 4.97      
4 A' 3169 3136 5.21      
5 A' 1527 1511 5.15      
6 A' 1452 1437 5.28      
7 A' 1400 1386 10.76      
8 A' 1344 1330 3.61      
9 A' 1247 1234 3.24      
10 A' 1156 1144 0.59      
11 A' 1124 1112 16.04      
12 A' 1031 1020 12.73      
13 A' 1022 1011 34.75      
14 A' 914 905 4.40      
15 A' 895 886 8.93      
16 A" 840 831 6.84      
17 A" 788 779 21.08      
18 A" 710 702 88.48      
19 A" 677 670 20.69      
20 A" 621 615 0.46      
21 A" 504 498 55.51      

Unscaled Zero Point Vibrational Energy (zpe) 15195.3 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 15037.3 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 PBEPBE/6-311G*
ABC
0.31961 0.31118 0.15767

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.118 0.734 0.000
C2 1.118 0.307 0.000
H3 1.271 -1.907 0.000
C4 0.665 -1.004 0.000
H5 -1.491 -1.687 0.000
C6 -0.745 -0.893 0.000
N7 -1.153 0.384 0.000
H8 -0.048 2.101 0.000
N9 0.000 1.088 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08742.77342.26534.34543.29333.28982.56122.1470
C21.08742.21951.38753.28342.21632.27232.13931.3634
H32.77342.21951.08692.77052.25693.33544.21953.2537
C42.26531.38751.08692.26161.41522.28803.18642.1960
H54.34543.28342.77052.26161.08882.09814.05343.1504
C63.29332.21632.25691.41521.08881.34063.07442.1172
N73.28982.27233.33542.28802.09811.34062.04211.3517
H82.56122.13934.21953.18644.05343.07442.04211.0139
N92.14701.36343.25372.19603.15042.11721.35171.0139

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 132.137 H1 C2 N9 121.934
C2 C4 H3 127.112 C2 C4 C6 104.516
C2 N9 N7 113.632 C2 N9 H8 127.684
H3 C4 C6 128.372 C4 C2 N9 105.929
C4 C6 H5 128.685 C4 C6 N7 112.223
H5 C6 N7 119.092 C6 N7 N9 103.700
N7 N9 H8 118.684
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.211      
2 C 0.061      
3 H 0.190      
4 C -0.416      
5 H 0.197      
6 C -0.026      
7 N -0.174      
8 H 0.350      
9 N -0.394      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.028 0.995 0.000 2.259
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.568 2.443 0.000
y 2.443 -21.973 0.000
z 0.000 0.000 -32.003
Traceless
 xyz
x -2.580 2.443 0.000
y 2.443 8.813 0.000
z 0.000 0.000 -6.233
Polar
3z2-r2-12.465
x2-y2-7.595
xy2.443
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.409 0.276 0.000
y 0.276 7.490 0.000
z 0.000 0.000 3.247


<r2> (average value of r2) Å2
<r2> 80.680
(<r2>)1/2 8.982