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

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-224.858248
Energy at 298.15K-224.864321
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 B3PW91/3-21G
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' 3648 3506 94.50      
2 A' 3324 3195 0.19      
3 A' 3297 3170 1.15      
4 A' 3292 3164 2.33      
5 A' 1544 1484 14.94      
6 A' 1448 1391 11.35      
7 A' 1405 1350 8.51      
8 A' 1361 1308 3.43      
9 A' 1255 1207 2.06      
10 A' 1156 1111 4.62      
11 A' 1136 1092 19.72      
12 A' 1073 1031 6.39      
13 A' 995 956 15.27      
14 A' 955 918 3.69      
15 A' 935 898 20.44      
16 A" 950 913 0.62      
17 A" 886 852 14.56      
18 A" 789 758 93.27      
19 A" 686 659 47.58      
20 A" 658 632 5.63      
21 A" 604 581 84.76      

Unscaled Zero Point Vibrational Energy (zpe) 15696.3 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 15087.3 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 B3PW91/3-21G
ABC
0.31504 0.30769 0.15566

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.117 0.726 0.000
C2 1.119 0.319 0.000
H3 1.285 -1.881 0.000
C4 0.678 -0.992 0.000
H5 -1.447 -1.722 0.000
C6 -0.737 -0.911 0.000
N7 -1.179 0.361 0.000
H8 -0.063 2.113 0.000
N9 0.000 1.106 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.07732.73652.24084.32343.29003.31532.58372.1504
C21.07732.20631.38333.27872.22692.29812.14881.3681
H32.73652.20631.07622.73672.24253.33134.21573.2517
C42.24081.38331.07622.24711.41762.29783.19282.2051
H54.32343.27872.73672.24711.07752.10044.07733.1766
C63.29002.22692.24251.41761.07751.34723.09892.1478
N73.31532.29813.33132.29782.10041.34722.07701.3942
H82.58372.14884.21573.19284.07733.09892.07701.0094
N92.15041.36813.25172.20513.17662.14781.39421.0094

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 130.784 H1 C2 N9 122.683
C2 C4 H3 127.100 C2 C4 C6 105.316
C2 N9 N7 112.599 C2 N9 H8 128.700
H3 C4 C6 127.585 C4 C2 N9 106.534
C4 C6 H5 127.955 C4 C6 N7 112.403
H5 C6 N7 119.642 C6 N7 N9 103.149
N7 N9 H8 118.701
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.245      
2 C 0.117      
3 H 0.212      
4 C -0.378      
5 H 0.236      
6 C 0.046      
7 N -0.303      
8 H 0.364      
9 N -0.539      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.180 0.933 0.000 2.371
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.211 2.600 0.000
y 2.600 -21.323 0.000
z 0.000 0.000 -32.053
Traceless
 xyz
x -2.523 2.600 0.000
y 2.600 9.309 0.000
z 0.000 0.000 -6.787
Polar
3z2-r2-13.573
x2-y2-7.888
xy2.600
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> 81.154
(<r2>)1/2 9.009