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

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-226.198601
Energy at 298.15K-226.204546
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/6-31G*
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' 3666 3520 64.39      
2 A' 3292 3161 1.35      
3 A' 3275 3145 3.67      
4 A' 3260 3131 6.50      
5 A' 1585 1522 6.57      
6 A' 1500 1440 6.88      
7 A' 1442 1385 13.03      
8 A' 1397 1342 4.78      
9 A' 1291 1240 2.49      
10 A' 1186 1139 0.64      
11 A' 1156 1110 17.74      
12 A' 1067 1024 7.27      
13 A' 1055 1013 35.59      
14 A' 941 903 6.13      
15 A' 922 885 9.16      
16 A" 889 854 4.34      
17 A" 834 801 10.18      
18 A" 753 723 71.09      
19 A" 693 666 22.26      
20 A" 637 612 0.04      
21 A" 498 478 61.08      

Unscaled Zero Point Vibrational Energy (zpe) 15669.0 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 15046.9 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*
ABC
0.32122 0.31352 0.15866

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.106 0.732 0.000
C2 1.113 0.307 0.000
H3 1.267 -1.897 0.000
C4 0.665 -1.000 0.000
H5 -1.479 -1.685 0.000
C6 -0.744 -0.892 0.000
N7 -1.150 0.378 0.000
H8 -0.051 2.095 0.000
N9 0.000 1.087 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08062.76012.25314.32493.28053.27562.55152.1362
C21.08062.20941.38133.26972.21022.26402.13311.3592
H32.76012.20941.08022.75442.24803.31924.20363.2419
C42.25311.38131.08022.25181.41342.27903.17632.1904
H54.32493.26972.75442.25181.08222.08994.04133.1427
C63.28052.21022.24801.41341.08221.33323.06582.1141
N73.27562.26403.31922.27902.08991.33322.03831.3509
H82.55152.13314.20363.17634.04133.06582.03831.0089
N92.13621.35923.24192.19043.14272.11411.35091.0089

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 132.080 H1 C2 N9 121.802
C2 C4 H3 127.256 C2 C4 C6 104.525
C2 N9 N7 113.317 C2 N9 H8 127.908
H3 C4 C6 128.219 C4 C2 N9 106.118
C4 C6 H5 128.430 C4 C6 N7 112.114
H5 C6 N7 119.456 C6 N7 N9 103.926
N7 N9 H8 118.774
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.157 0.118   0.131
2 C 0.076 -0.063   -0.059
3 H 0.136 0.129   0.165
4 C -0.227 -0.252   -0.314
5 H 0.141 0.070   0.097
6 C 0.044 0.182   0.158
7 N -0.278 -0.443   -0.437
8 H 0.346 0.275   0.294
9 N -0.394 -0.016   -0.035


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.102 0.900 0.000 2.286
CHELPG 2.069 0.895 0.000 2.254
AIM        
ESP 2.098 0.901 0.000 2.283


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.296 2.413 0.000
y 2.413 -21.795 0.000
z 0.000 0.000 -31.212
Traceless
 xyz
x -2.792 2.413 0.000
y 2.413 8.459 0.000
z 0.000 0.000 -5.666
Polar
3z2-r2-11.332
x2-y2-7.501
xy2.413
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.852 0.301 0.000
y 0.301 7.113 -0.000
z 0.000 -0.000 2.526


<r2> (average value of r2) Å2
<r2> 80.006
(<r2>)1/2 8.945