return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-224.847271
Energy at 298.15K-224.853357
Nuclear repulsion energy161.653597
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 B1B95/3-21G
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' 3654 3495 95.21      
2 A' 3335 3190 0.05      
3 A' 3312 3169 1.45      
4 A' 3305 3162 2.09      
5 A' 1548 1481 15.16      
6 A' 1452 1389 11.69      
7 A' 1408 1347 8.65      
8 A' 1363 1304 3.46      
9 A' 1261 1206 2.15      
10 A' 1159 1109 4.05      
11 A' 1140 1090 19.59      
12 A' 1075 1029 5.91      
13 A' 997 954 17.10      
14 A' 951 909 3.41      
15 A' 932 892 18.78      
16 A" 955 913 1.18      
17 A" 894 856 12.27      
18 A" 793 759 92.91      
19 A" 688 658 57.43      
20 A" 661 632 8.07      
21 A" 614 587 72.11      

Unscaled Zero Point Vibrational Energy (zpe) 15747.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 15065.1 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 B1B95/3-21G
ABC
0.31656 0.30907 0.15639

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.111 0.725 0.000
C2 1.116 0.318 0.000
H3 1.283 -1.877 0.000
C4 0.677 -0.990 0.000
H5 -1.445 -1.716 0.000
C6 -0.735 -0.909 0.000
N7 -1.176 0.360 0.000
H8 -0.065 2.109 0.000
N9 0.000 1.103 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.07532.73042.23614.31383.28193.30772.57872.1450
C21.07532.20161.38043.27102.22082.29252.14471.3643
H32.73042.20161.07402.73322.23853.32494.20763.2448
C42.23611.38041.07402.24291.41432.29333.18692.2005
H54.31383.27102.73322.24291.07542.09414.06693.1684
C63.28192.22082.23851.41431.07541.34373.09142.1422
N73.30772.29253.32492.29332.09411.34372.07211.3912
H82.57872.14474.20763.18694.06693.09142.07211.0077
N92.14501.36433.24482.20053.16842.14221.39121.0077

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 130.760 H1 C2 N9 122.658
C2 C4 H3 127.088 C2 C4 C6 105.232
C2 N9 N7 112.601 C2 N9 H8 128.792
H3 C4 C6 127.680 C4 C2 N9 106.582
C4 C6 H5 128.024 C4 C6 N7 112.477
H5 C6 N7 119.498 C6 N7 N9 103.107
N7 N9 H8 118.607
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.240      
2 C 0.123      
3 H 0.207      
4 C -0.370      
5 H 0.231      
6 C 0.047      
7 N -0.297      
8 H 0.361      
9 N -0.542      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.166 0.938 0.000 2.360
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.197 2.562 0.000
y 2.562 -21.376 0.000
z 0.000 0.000 -31.980
Traceless
 xyz
x -2.518 2.562 0.000
y 2.562 9.212 0.000
z 0.000 0.000 -6.694
Polar
3z2-r2-13.388
x2-y2-7.820
xy2.562
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.298 0.329 0.000
y 0.329 6.628 0.000
z 0.000 0.000 1.812


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000