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

using model chemistry: mPW1PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-226.164419
Energy at 298.15K-226.170464
Nuclear repulsion energy163.840308
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 mPW1PW91/6-31G(2df,p)
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' 3722 3553 82.52      
2 A' 3310 3160 0.49      
3 A' 3289 3140 1.41      
4 A' 3273 3125 3.58      
5 A' 1591 1519 6.30      
6 A' 1512 1444 5.28      
7 A' 1449 1383 16.13      
8 A' 1410 1346 2.57      
9 A' 1302 1243 4.55      
10 A' 1212 1157 2.11      
11 A' 1167 1114 15.96      
12 A' 1074 1025 34.74      
13 A' 1068 1019 9.35      
14 A' 946 903 5.86      
15 A' 924 882 9.27      
16 A" 910 869 4.84      
17 A" 852 814 7.37      
18 A" 772 737 70.66      
19 A" 706 674 22.55      
20 A" 645 616 0.05      
21 A" 551 526 50.96      

Unscaled Zero Point Vibrational Energy (zpe) 15841.7 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 15124.1 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 mPW1PW91/6-31G(2df,p)
ABC
0.32507 0.31770 0.16067

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.095 0.730 0.000
C2 1.105 0.305 0.000
H3 1.261 -1.891 0.000
C4 0.660 -0.997 0.000
H5 -1.479 -1.674 0.000
C6 -0.742 -0.885 0.000
N7 -1.138 0.380 0.000
H8 -0.046 2.081 0.000
N9 0.000 1.079 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.07792.75122.24554.30763.26503.25242.53192.1239
C21.07792.20171.37573.25452.19722.24442.11671.3489
H32.75122.20171.07692.74802.24143.30384.18203.2266
C42.24551.37571.07692.24391.40712.26563.15852.1785
H54.30763.25452.74802.24391.07952.08254.01963.1252
C63.26502.19722.24141.40711.07951.32593.04712.0996
N73.25242.24443.30382.26562.08251.32592.02161.3357
H82.53192.11674.18203.15854.01963.04712.02161.0035
N92.12391.34893.22662.17853.12522.09961.33571.0035

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 132.088 H1 C2 N9 121.741
C2 C4 H3 127.286 C2 C4 C6 104.279
C2 N9 N7 113.446 C2 N9 H8 127.648
H3 C4 C6 128.435 C4 C2 N9 106.172
C4 C6 H5 128.462 C4 C6 N7 111.948
H5 C6 N7 119.590 C6 N7 N9 104.155
N7 N9 H8 118.906
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.158      
2 C -0.036      
3 H 0.137      
4 C -0.244      
5 H 0.140      
6 C -0.018      
7 N -0.234      
8 H 0.298      
9 N -0.200      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.058 0.894 0.000 2.244
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.955 2.406 0.000
y 2.406 -21.586 0.000
z 0.000 0.000 -30.978
Traceless
 xyz
x -2.673 2.406 0.000
y 2.406 8.381 0.000
z 0.000 0.000 -5.708
Polar
3z2-r2-11.415
x2-y2-7.369
xy2.406
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.995 0.271 0.000
y 0.271 7.210 0.000
z 0.000 0.000 3.101


<r2> (average value of r2) Å2
<r2> 79.087
(<r2>)1/2 8.893