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

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-44.810067
Energy at 298.15K-44.818089
Nuclear repulsion energy118.474045
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 3906 3529 67.11      
2 A 3448 3115 9.49      
3 A 3420 3089 9.28      
4 A 3313 2993 13.66      
5 A 3246 2933 38.41      
6 A 3191 2883 43.99      
7 A 1749 1580 58.96      
8 A 1645 1486 8.68      
9 A 1628 1471 5.33      
10 A 1615 1459 7.15      
11 A 1574 1422 54.70      
12 A 1545 1396 4.36      
13 A 1490 1346 2.02      
14 A 1365 1233 14.70      
15 A 1246 1125 18.14      
16 A 1220 1102 0.30      
17 A 1165 1052 31.81      
18 A 1159 1047 0.18      
19 A 1088 982 13.19      
20 A 1043 943 7.20      
21 A 992 896 2.18      
22 A 984 889 9.16      
23 A 823 743 71.47      
24 A 744 672 7.75      
25 A 711 642 1.67      
26 A 683 617 9.69      
27 A 520 470 97.17      
28 A 367 332 5.59      
29 A 274 248 9.66      
30 A 81 73 0.28      

Unscaled Zero Point Vibrational Energy (zpe) 23116.3 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 20883.3 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
0.30185 0.12016 0.08734

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.085 -0.046 0.000
H2 2.463 0.466 0.881
H3 2.461 -1.060 -0.001
H4 2.463 0.469 -0.880
N5 -0.192 1.030 0.001
H6 0.134 1.970 -0.002
C7 0.580 -0.091 0.000
N8 -0.146 -1.167 -0.000
C9 -1.459 -0.737 -0.000
H10 -2.274 -1.434 -0.000
C11 -1.513 0.617 -0.000
H12 -2.331 1.308 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.08731.08181.08732.51862.80591.50542.49703.61064.57463.65914.6196
H21.08731.76361.76132.85362.90992.15223.20194.19595.17944.07574.9469
H31.08181.76361.76363.37763.82112.11592.60953.93324.74984.31415.3461
H41.08731.76131.76362.85292.90702.15223.20274.19625.18004.07524.9462
N52.51862.85363.37762.85290.99501.36132.19712.17403.22551.38412.1573
H62.80592.90993.82112.90700.99502.10903.14933.14074.16932.13122.5520
C71.50542.15222.11592.15221.36132.10901.29812.13903.15442.21043.2307
N82.49703.20192.60953.20272.19713.14931.29811.38112.14442.24783.3021
C93.61064.19593.93324.19622.17403.14072.13901.38111.07241.35562.2242
H104.57465.17944.74985.18003.22554.16933.15442.14441.07242.18772.7433
C113.65914.07574.31414.07521.38412.13122.21042.24781.35562.18771.0710
H124.61964.94695.34614.94622.15732.55203.23073.30212.22422.74331.0710

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 122.862 C1 C7 N8 125.748
H2 C1 H3 108.795 H2 C1 H4 108.180
H2 C1 C7 111.192 H3 C1 H4 108.793
H3 C1 C7 108.629 H4 C1 C7 111.194
N5 C7 N8 111.391 N5 C11 C9 105.025
N5 C11 H12 122.456 H6 N5 C7 126.322
H6 N5 C11 126.438 C7 N5 C11 107.240
C7 N8 C9 105.906 N8 C9 H10 121.347
N8 C9 C11 110.439 C9 C11 H12 132.519
H10 C9 C11 128.214
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.655      
2 H 0.174      
3 H 0.212      
4 H 0.174      
5 N -0.272      
6 H 0.394      
7 C 0.077      
8 N -0.121      
9 C -0.147      
10 H 0.217      
11 C -0.287      
12 H 0.233      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.637 3.785 -0.003 3.838
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.430 0.554 -0.002
y 0.554 -34.380 -0.009
z -0.002 -0.009 -38.529
Traceless
 xyz
x 6.025 0.554 -0.002
y 0.554 0.099 -0.009
z -0.002 -0.009 -6.124
Polar
3z2-r2-12.248
x2-y23.950
xy0.554
xz-0.002
yz-0.009


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.328 0.106 0.000
y 0.106 8.197 -0.000
z 0.000 -0.000 5.122


<r2> (average value of r2) Å2
<r2> 113.642
(<r2>)1/2 10.660