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

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-224.011200
Energy at 298.15K-224.017168
HF Energy-223.518366
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 MP2/3-21G
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' 3624 3459 99.79      
2 A' 3318 3167 0.24      
3 A' 3297 3147 3.01      
4 A' 3289 3139 0.59      
5 A' 1513 1445 15.11      
6 A' 1434 1369 11.90      
7 A' 1407 1343 11.59      
8 A' 1352 1291 2.73      
9 A' 1187 1133 2.51      
10 A' 1152 1100 3.47      
11 A' 1121 1070 14.54      
12 A' 1062 1013 8.67      
13 A' 977 933 4.36      
14 A' 946 903 4.26      
15 A' 923 881 13.75      
16 A" 865 826 10.50      
17 A" 826 788 18.69      
18 A" 746 712 91.36      
19 A" 681 650 36.79      
20 A" 650 620 0.40      
21 A" 565 539 76.55      

Unscaled Zero Point Vibrational Energy (zpe) 15467.4 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 14763.7 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 MP2/3-21G
ABC
0.30805 0.30154 0.15238

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.127 0.735 0.000
C2 1.130 0.323 0.000
H3 1.297 -1.887 0.000
C4 0.685 -1.000 0.000
H5 -1.448 -1.739 0.000
C6 -0.736 -0.929 0.000
N7 -1.198 0.365 0.000
H8 -0.062 2.129 0.000
N9 0.000 1.120 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.07902.74952.25574.34733.31133.34542.59602.1616
C21.07902.21561.39513.30072.24672.32812.16481.3829
H32.74952.21561.07812.74942.24773.36144.24013.2746
C42.25571.39511.07812.25711.42242.32543.21702.2274
H54.34733.30072.74942.25711.07842.11924.10893.2046
C63.31132.24672.24771.42241.07841.37443.13172.1771
N73.34542.32813.36142.32542.11921.37442.09781.4157
H82.59602.16484.24013.21704.10893.13172.09781.0114
N92.16161.38293.27462.22743.20462.17711.41571.0114

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 131.064 H1 C2 N9 122.332
C2 C4 H3 126.751 C2 C4 C6 105.762
C2 N9 N7 112.582 C2 N9 H8 128.755
H3 C4 C6 127.487 C4 C2 N9 106.604
C4 C6 H5 128.473 C4 C6 N7 112.485
H5 C6 N7 119.041 C6 N7 N9 102.566
N7 N9 H8 118.663
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.225     0.148
2 C 0.093     -0.091
3 H 0.199     0.195
4 C -0.344     -0.378
5 H 0.214     0.098
6 C 0.022     0.172
7 N -0.269     -0.432
8 H 0.356     0.289
9 N -0.495     -0.001


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.116 1.033 0.000 2.355
CHELPG        
AIM        
ESP 2.096 1.029 0.000 2.335


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.215 2.439 0.000
y 2.439 -22.079 0.000
z 0.000 0.000 -32.512
Traceless
 xyz
x -2.920 2.439 0.000
y 2.439 9.285 0.000
z 0.000 0.000 -6.365
Polar
3z2-r2-12.730
x2-y2-8.136
xy2.439
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.297 0.380 0.000
y 0.380 6.630 0.000
z 0.000 0.000 1.738


<r2> (average value of r2) Å2
<r2> 82.799
(<r2>)1/2 9.099