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

using model chemistry: B3LYP/CEP-31G*

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/CEP-31G*
 hartrees
Energy at 0K-39.126018
Energy at 298.15K-39.131913
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 B3LYP/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3661 3535 69.10      
2 A' 3266 3154 1.39      
3 A' 3246 3135 2.72      
4 A' 3234 3123 5.66      
5 A' 1560 1506 6.92      
6 A' 1463 1413 9.31      
7 A' 1431 1382 12.93      
8 A' 1374 1327 3.31      
9 A' 1263 1220 3.02      
10 A' 1168 1128 0.59      
11 A' 1136 1097 17.77      
12 A' 1044 1008 9.49      
13 A' 1037 1002 43.37      
14 A' 909 878 3.88      
15 A' 896 865 8.77      
16 A" 896 865 1.67      
17 A" 849 820 23.54      
18 A" 765 738 132.14      
19 A" 670 647 21.17      
20 A" 619 598 0.00      
21 A" 488 471 61.79      

Unscaled Zero Point Vibrational Energy (zpe) 15485.7 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 14954.5 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 B3LYP/CEP-31G*
ABC
0.31391 0.30568 0.15487

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.124 0.720 0.000
C2 1.120 0.295 0.000
H3 1.258 -1.939 0.000
C4 0.659 -1.031 0.000
H5 -1.527 -1.691 0.000
C6 -0.772 -0.903 0.000
N7 -1.169 0.383 0.000
H8 -0.042 2.105 0.000
N9 0.000 1.089 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08922.79582.28254.37393.31913.30932.57062.1554
C21.08922.23831.40403.30892.23972.29082.15091.3732
H32.79582.23831.08802.79582.27933.35904.24783.2789
C42.28251.40401.08802.28271.43662.31093.21322.2199
H54.37393.30892.79582.28271.09082.10454.07563.1710
C63.31912.23972.27931.43661.09081.34603.09522.1361
N73.30932.29083.35902.31092.10451.34602.05761.3651
H82.57062.15094.24783.21324.07563.09522.05761.0169
N92.15541.37323.27892.21993.17102.13611.36511.0169

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 132.133 H1 C2 N9 121.740
C2 C4 H3 127.380 C2 C4 C6 104.076
C2 N9 N7 113.559 C2 N9 H8 127.672
H3 C4 C6 128.545 C4 C2 N9 106.127
C4 C6 H5 128.653 C4 C6 N7 112.257
H5 C6 N7 119.091 C6 N7 N9 103.982
N7 N9 H8 118.769
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.297      
2 C -0.607      
3 H 0.333      
4 C 0.040      
5 H 0.280      
6 C -0.685      
7 N 0.067      
8 H 0.338      
9 N -0.063      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.183 0.828 0.000 2.334
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.225 2.661 0.000
y 2.661 -21.426 0.000
z 0.000 0.000 -31.992
Traceless
 xyz
x -2.516 2.661 0.000
y 2.661 9.182 0.000
z 0.000 0.000 -6.666
Polar
3z2-r2-13.332
x2-y2-7.799
xy2.661
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.233 0.275 -0.002
y 0.275 7.395 0.000
z -0.002 0.000 3.233


<r2> (average value of r2) Å2
<r2> 67.690
(<r2>)1/2 8.227