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

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-38.016504
Energy at 298.15K-38.022820
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 HF/CEP-121G
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' 3937 3593 94.12      
2 A' 3449 3147 2.22      
3 A' 3427 3128 8.66      
4 A' 3416 3117 2.09      
5 A' 1696 1548 14.12      
6 A' 1590 1451 18.75      
7 A' 1517 1385 18.09      
8 A' 1507 1376 10.55      
9 A' 1383 1262 2.05      
10 A' 1253 1144 1.13      
11 A' 1206 1100 30.51      
12 A' 1133 1034 3.04      
13 A' 1114 1016 58.14      
14 A' 1012 923 2.94      
15 A' 1002 915 18.68      
16 A" 1031 940 1.09      
17 A" 994 907 6.18      
18 A" 865 790 132.74      
19 A" 734 670 79.94      
20 A" 699 638 18.25      
21 A" 654 597 60.30      

Unscaled Zero Point Vibrational Energy (zpe) 16810.1 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 15339.2 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 HF/CEP-121G
ABC
0.31816 0.31245 0.15764

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.098 0.697 0.000
C2 1.108 0.294 0.000
H3 1.245 -1.902 0.000
C4 0.658 -1.011 0.000
H5 -1.498 -1.684 0.000
C6 -0.769 -0.903 0.000
N7 -1.157 0.367 0.000
H8 -0.046 2.081 0.000
N9 0.000 1.091 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.06852.73532.23374.31233.28293.27112.55192.1344
C21.06852.20031.38033.27162.22632.26602.12721.3652
H32.73532.20031.06742.75122.24813.30414.18683.2420
C42.23371.38031.06742.25811.43072.27833.17062.2026
H54.31233.27162.75122.25811.06822.07944.03493.1539
C63.28292.22632.24811.43071.06821.32803.07002.1376
N73.27112.26603.30412.27832.07941.32802.04191.3649
H82.55192.12724.18683.17064.03493.07002.04190.9904
N92.13441.36523.24202.20263.15392.13761.36490.9904

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 131.199 H1 C2 N9 122.107
C2 C4 H3 127.575 C2 C4 C6 104.730
C2 N9 N7 112.208 C2 N9 H8 128.430
H3 C4 C6 127.695 C4 C2 N9 106.694
C4 C6 H5 128.694 C4 C6 N7 111.294
H5 C6 N7 120.013 C6 N7 N9 105.074
N7 N9 H8 119.363
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.218      
2 C -0.196      
3 H 0.213      
4 C -0.081      
5 H 0.191      
6 C -0.344      
7 N -0.003      
8 H 0.374      
9 N -0.372      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.563 0.668 0.000 2.648
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.583 3.280 0.000
y 3.280 -22.305 0.000
z 0.000 0.000 -32.960
Traceless
 xyz
x -2.951 3.280 0.000
y 3.280 9.467 0.000
z 0.000 0.000 -6.517
Polar
3z2-r2-13.033
x2-y2-8.279
xy3.280
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.756 0.293 0.000
y 0.293 7.211 0.000
z 0.000 0.000 3.442


<r2> (average value of r2) Å2
<r2> 67.359
(<r2>)1/2 8.207