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: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-224.883781
Energy at 298.15K-224.890033
HF Energy-224.883781
Nuclear repulsion energy165.371957
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 HF/Def2TZVPP
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' 3918 3552 114.97      
2 A' 3423 3102 0.86      
3 A' 3402 3083 3.41      
4 A' 3387 3070 6.86      
5 A' 1728 1566 10.35      
6 A' 1621 1469 11.92      
7 A' 1533 1389 3.83      
8 A' 1529 1386 32.03      
9 A' 1399 1268 2.94      
10 A' 1272 1153 1.71      
11 A' 1220 1106 27.90      
12 A' 1134 1027 52.86      
13 A' 1117 1013 0.40      
14 A' 1017 922 6.52      
15 A' 998 904 14.19      
16 A" 1028 932 4.71      
17 A" 989 896 2.59      
18 A" 852 772 104.86      
19 A" 747 677 19.81      
20 A" 688 623 0.15      
21 A" 572 519 75.58      

Unscaled Zero Point Vibrational Energy (zpe) 16786.4 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 15215.2 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 HF/Def2TZVPP
ABC
0.33068 0.32365 0.16356

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.069 0.729 0.000
C2 1.090 0.307 0.000
H3 1.253 -1.867 0.000
C4 0.657 -0.983 0.000
H5 -1.468 -1.657 0.000
C6 -0.739 -0.878 0.000
N7 -1.123 0.366 0.000
H8 -0.048 2.058 0.000
N9 0.000 1.072 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.06632.72192.21934.26743.23513.21212.49902.0971
C21.06632.18011.36053.22552.17882.21332.08831.3317
H32.72192.18011.06602.72952.22403.26044.13503.1951
C42.21931.36051.06602.23031.40012.23343.12172.1576
H54.26743.22552.72952.23031.06792.05263.97773.0992
C63.23512.17882.22401.40011.06791.30143.01582.0848
N73.21212.21333.26042.23342.05261.30142.00451.3261
H82.49902.08834.13503.12173.97773.01582.00450.9872
N92.09711.33173.19512.15763.09922.08481.32610.9872

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 131.894 H1 C2 N9 121.577
C2 C4 H3 127.496 C2 C4 C6 104.220
C2 N9 N7 112.766 C2 N9 H8 127.840
H3 C4 C6 128.284 C4 C2 N9 106.529
C4 C6 H5 128.786 C4 C6 N7 111.472
H5 C6 N7 119.742 C6 N7 N9 105.014
N7 N9 H8 119.394
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.110      
2 C 0.025      
3 H 0.098      
4 C -0.191      
5 H 0.082      
6 C 0.058      
7 N -0.310      
8 H 0.203      
9 N -0.075      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.223 0.803 0.000 2.363
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.829 2.829 0.000
y 2.829 -22.266 0.000
z 0.000 0.000 -32.330
Traceless
 xyz
x -2.531 2.829 0.000
y 2.829 8.814 0.000
z 0.000 0.000 -6.283
Polar
3z2-r2-12.566
x2-y2-7.563
xy2.829
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.145 0.213 0.000
y 0.213 7.501 0.000
z 0.000 0.000 4.314


<r2> (average value of r2) Å2
<r2> 78.598
(<r2>)1/2 8.866