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: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-226.215660
Energy at 298.15K-226.221656
Nuclear repulsion energy163.175403
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 B3LYP/6-31G(2df,p)
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' 3677 3548 74.46      
2 A' 3280 3166 0.92      
3 A' 3261 3146 2.04      
4 A' 3246 3132 4.15      
5 A' 1571 1516 6.38      
6 A' 1484 1432 5.87      
7 A' 1423 1373 13.54      
8 A' 1387 1338 4.62      
9 A' 1285 1240 2.87      
10 A' 1185 1143 0.49      
11 A' 1149 1109 16.97      
12 A' 1062 1025 8.98      
13 A' 1052 1015 31.46      
14 A' 941 908 6.88      
15 A' 922 890 9.32      
16 A" 899 867 5.14      
17 A" 838 809 7.42      
18 A" 764 737 63.57      
19 A" 697 672 21.84      
20 A" 639 617 0.03      
21 A" 525 507 49.79      

Unscaled Zero Point Vibrational Energy (zpe) 15642.8 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 15095.3 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 B3LYP/6-31G(2df,p)
ABC
0.32234 0.31519 0.15936

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.100 0.732 0.000
C2 1.110 0.307 0.000
H3 1.265 -1.892 0.000
C4 0.664 -0.998 0.000
H5 -1.477 -1.683 0.000
C6 -0.743 -0.890 0.000
N7 -1.146 0.378 0.000
H8 -0.049 2.090 0.000
N9 0.000 1.085 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.07842.75412.24904.31643.27413.26592.54202.1299
C21.07842.20441.37883.26332.20592.25682.12631.3555
H32.75412.20441.07762.75022.24473.31194.19323.2352
C42.24901.37881.07762.24771.41132.27363.16902.1865
H54.31643.26332.75022.24771.08022.08754.03433.1378
C63.27412.20592.24471.41131.08021.33073.06002.1108
N73.26592.25683.31192.27362.08751.33072.03351.3468
H82.54202.12634.19323.16904.03433.06002.03351.0058
N92.12991.35553.23522.18653.13782.11081.34681.0058

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 132.104 H1 C2 N9 121.701
C2 C4 H3 127.209 C2 C4 C6 104.482
C2 N9 N7 113.263 C2 N9 H8 127.829
H3 C4 C6 128.308 C4 C2 N9 106.195
C4 C6 H5 128.392 C4 C6 N7 111.998
H5 C6 N7 119.610 C6 N7 N9 104.061
N7 N9 H8 118.908
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.131      
2 C -0.027      
3 H 0.104      
4 C -0.197      
5 H 0.110      
6 C -0.002      
7 N -0.225      
8 H 0.275      
9 N -0.168      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.049 0.878 0.000 2.229
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.308 2.371 0.000
y 2.371 -21.949 0.000
z 0.000 0.000 -30.943
Traceless
 xyz
x -2.862 2.371 0.000
y 2.371 8.177 0.000
z 0.000 0.000 -5.315
Polar
3z2-r2-10.629
x2-y2-7.359
xy2.371
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.066 0.270 0.001
y 0.270 7.315 0.001
z 0.001 0.001 3.063


<r2> (average value of r2) Å2
<r2> 79.710
(<r2>)1/2 8.928