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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-226.115195
Energy at 298.15K-226.121171
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 B3PW91/6-31G*
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' 3687 3527 69.48      
2 A' 3303 3160 0.97      
3 A' 3286 3144 3.30      
4 A' 3270 3129 6.06      
5 A' 1592 1523 6.57      
6 A' 1514 1449 6.29      
7 A' 1456 1393 14.30      
8 A' 1407 1346 3.28      
9 A' 1300 1244 3.74      
10 A' 1203 1151 2.06      
11 A' 1166 1116 16.84      
12 A' 1071 1024 18.88      
13 A' 1067 1020 26.53      
14 A' 942 902 5.31      
15 A' 920 880 8.95      
16 A" 891 852 4.69      
17 A" 836 800 11.81      
18 A" 754 721 80.74      
19 A" 698 668 23.15      
20 A" 639 612 0.06      
21 A" 523 500 61.47      

Unscaled Zero Point Vibrational Energy (zpe) 15762.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 15080.2 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 B3PW91/6-31G*
ABC
0.32292 0.31509 0.15948

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.104 0.731 0.000
C2 1.110 0.306 0.000
H3 1.263 -1.898 0.000
C4 0.663 -0.999 0.000
H5 -1.482 -1.680 0.000
C6 -0.744 -0.888 0.000
N7 -1.145 0.381 0.000
H8 -0.049 2.090 0.000
N9 0.000 1.083 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08102.76002.25244.32113.27583.26752.54562.1332
C21.08102.20891.38013.26532.20512.25612.12721.3549
H32.76002.20891.08052.75392.24653.31524.19763.2370
C42.25241.38011.08052.24971.41052.27413.17012.1851
H54.32113.26532.75392.24971.08252.08824.03273.1348
C63.27582.20512.24651.41051.08251.33103.05782.1064
N73.26752.25613.31522.27412.08821.33102.02991.3426
H82.54562.12724.19763.17014.03273.05782.02991.0082
N92.13321.35493.23702.18513.13482.10641.34261.0082

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 132.091 H1 C2 N9 121.860
C2 C4 H3 127.292 C2 C4 C6 104.397
C2 N9 N7 113.516 C2 N9 H8 127.752
H3 C4 C6 128.311 C4 C2 N9 106.049
C4 C6 H5 128.476 C4 C6 N7 112.067
H5 C6 N7 119.457 C6 N7 N9 103.970
N7 N9 H8 118.731
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.188     0.141
2 C 0.056     -0.074
3 H 0.169     0.177
4 C -0.276     -0.329
5 H 0.172     0.107
6 C 0.020     0.144
7 N -0.279     -0.436
8 H 0.367     0.300
9 N -0.416     -0.031


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.117 0.916 0.000 2.307
CHELPG        
AIM        
ESP 2.110 0.920 0.000 2.302


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.036 2.454 0.000
y 2.454 -21.488 0.000
z 0.000 0.000 -31.274
Traceless
 xyz
x -2.656 2.454 0.000
y 2.454 8.667 0.000
z 0.000 0.000 -6.012
Polar
3z2-r2-12.023
x2-y2-7.548
xy2.454
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 79.603
(<r2>)1/2 8.922