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All results from a given calculation for C4H6N2 (1H-Imidazole, 2-methyl-)

using model chemistry: HF/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 HF/6-31G(2df,p)
 hartrees
Energy at 0K-263.888303
Energy at 298.15K-263.896405
Nuclear repulsion energy227.180335
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/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 3924 3553 77.90      
2 A 3434 3109 6.19      
3 A 3402 3080 7.61      
4 A 3292 2981 7.49      
5 A 3224 2919 26.10      
6 A 3172 2872 30.80      
7 A 1767 1600 62.24      
8 A 1668 1510 9.38      
9 A 1626 1472 13.91      
10 A 1602 1451 5.84      
11 A 1578 1428 40.44      
12 A 1540 1395 1.15      
13 A 1500 1358 3.12      
14 A 1374 1244 14.42      
15 A 1251 1133 10.62      
16 A 1231 1115 1.74      
17 A 1171 1060 29.69      
18 A 1160 1051 1.52      
19 A 1093 990 10.34      
20 A 1049 950 4.74      
21 A 1001 906 2.29      
22 A 986 893 5.07      
23 A 838 759 40.67      
24 A 758 686 8.90      
25 A 719 651 1.67      
26 A 692 627 8.42      
27 A 533 483 88.22      
28 A 372 337 5.51      
29 A 282 256 8.29      
30 A 93 85 0.28      

Unscaled Zero Point Vibrational Energy (zpe) 23164.5 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 20975.5 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/6-31G(2df,p)
ABC
0.30599 0.12181 0.08855

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.099 -0.025 0.000
H2 2.477 0.489 0.879
H3 2.478 -1.037 -0.001
H4 2.477 0.491 -0.878
N5 -0.162 1.039 0.000
H6 0.162 1.975 -0.001
C7 0.605 -0.072 -0.000
N8 -0.114 -1.142 -0.000
C9 -1.420 -0.715 0.000
H10 -2.234 -1.409 0.000
C11 -1.473 0.628 -0.000
H12 -2.289 1.318 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.08651.08091.08652.49932.78411.49422.47903.58584.54873.63134.5886
H21.08651.76191.75712.83592.88832.14283.18574.17255.15484.04944.9167
H31.08091.76191.76193.35953.79972.10712.59493.91174.72744.28825.3172
H41.08651.75711.76192.83532.88642.14283.18654.17295.15544.04914.9162
N52.49932.83593.35952.83530.98991.35092.18192.15873.20731.37382.1446
H62.78412.88833.79972.88640.98992.09433.12893.12044.14602.11822.5372
C71.49422.14282.10712.14281.35092.09431.28942.12493.13852.19333.2106
N82.47903.18572.59493.18652.18193.12891.28941.37362.13672.23153.2831
C93.58584.17253.91174.17292.15873.12042.12491.37361.06981.34432.2108
H104.54875.15484.72745.15543.20734.14603.13852.13671.06982.17452.7271
C113.63134.04944.28824.04911.37382.11822.19332.23151.34432.17451.0681
H124.58864.91675.31724.91622.14462.53723.21063.28312.21082.72711.0681

picture of 1H-Imidazole, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C7 N5 122.833 C1 C7 N8 125.729
H2 C1 H3 108.763 H2 C1 H4 107.926
H2 C1 C7 111.279 H3 C1 H4 108.764
H3 C1 C7 108.764 H4 C1 C7 111.282
N5 C7 N8 111.438 N5 C11 C9 105.149
N5 C11 H12 122.366 H6 N5 C7 126.248
H6 N5 C11 126.539 C7 N5 C11 107.214
C7 N8 C9 105.825 N8 C9 H10 121.471
N8 C9 C11 110.374 C9 C11 H12 132.485
H10 C9 C11 128.155
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.494      
2 H 0.150      
3 H 0.183      
4 H 0.150      
5 N -0.409      
6 H 0.309      
7 C 0.360      
8 N -0.353      
9 C -0.099      
10 H 0.150      
11 C -0.111      
12 H 0.166      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.546 3.565 -0.002 3.606
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.249 0.600 -0.001
y 0.600 -33.856 -0.004
z -0.001 -0.004 -37.540
Traceless
 xyz
x 5.449 0.600 -0.001
y 0.600 0.038 -0.004
z -0.001 -0.004 -5.487
Polar
3z2-r2-10.974
x2-y23.608
xy0.600
xz-0.001
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.188 0.134 0.000
y 0.134 7.817 -0.000
z 0.000 -0.000 4.462


<r2> (average value of r2) Å2
<r2> 136.740
(<r2>)1/2 11.694