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

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-265.420227
Energy at 298.15K-265.428007
Nuclear repulsion energy225.799333
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 B1B95/6-31G*
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 3692 3505 45.58      
2 A 3325 3157 3.63      
3 A 3292 3125 7.72      
4 A 3200 3038 3.38      
5 A 3134 2975 18.04      
6 A 3074 2918 29.86      
7 A 1638 1555 39.05      
8 A 1562 1483 5.88      
9 A 1531 1453 3.53      
10 A 1513 1437 8.44      
11 A 1479 1404 42.76      
12 A 1449 1375 0.25      
13 A 1423 1351 1.29      
14 A 1302 1236 14.62      
15 A 1219 1158 2.49      
16 A 1155 1097 4.76      
17 A 1126 1069 26.76      
18 A 1072 1018 2.13      
19 A 1018 967 8.13      
20 A 980 930 1.00      
21 A 926 879 3.09      
22 A 864 820 9.82      
23 A 733 696 37.73      
24 A 695 660 3.63      
25 A 687 652 1.34      
26 A 648 615 17.27      
27 A 529 502 78.48      
28 A 346 328 5.13      
29 A 254 241 5.96      
30 A 89 84 0.22      

Unscaled Zero Point Vibrational Energy (zpe) 21977.2 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 20862.9 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 B1B95/6-31G*
ABC
0.29944 0.12119 0.08769

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.101 -0.022 0.000
H2 2.496 0.487 0.885
H3 2.475 -1.045 -0.001
H4 2.496 0.489 -0.884
N5 -0.168 1.046 0.000
H6 0.155 1.999 -0.001
C7 0.616 -0.069 -0.000
N8 -0.119 -1.156 -0.000
C9 -1.419 -0.725 -0.000
H10 -2.241 -1.425 0.000
C11 -1.478 0.638 0.000
H12 -2.297 1.337 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.09431.08891.09432.50792.80621.48672.49373.58994.56363.63944.6041
H21.09431.76951.76822.86202.92442.15153.21314.19295.18464.07384.9481
H31.08891.76951.76953.37003.82762.10022.59703.90744.73184.29625.3342
H41.09431.76821.76952.86142.92272.15153.21374.19325.18524.07364.9477
N52.50792.86203.37002.86141.00661.36272.20302.16863.22561.37202.1496
H62.80622.92443.82762.92271.00662.11923.16783.14674.17952.12592.5404
C71.48672.15152.10022.15151.36272.11921.31232.13763.16212.20933.2346
N82.49373.21312.59703.21372.20303.16781.31231.36942.13882.25053.3110
C93.58994.19293.90744.19322.16863.14672.13761.36941.07961.36442.2417
H104.56365.18464.73185.18523.22564.17953.16212.13881.07962.19962.7627
C113.63944.07384.29624.07361.37202.12592.20932.25051.36442.19961.0775
H124.60414.94815.33424.94772.14962.54043.23463.31102.24172.76271.0775

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 123.267 C1 C7 N8 125.862
H2 C1 H3 108.286 H2 C1 H4 107.788
H2 C1 C7 112.042 H3 C1 H4 108.287
H3 C1 C7 108.268 H4 C1 C7 112.045
N5 C7 N8 110.871 N5 C11 C9 104.840
N5 C11 H12 122.235 H6 N5 C7 126.214
H6 N5 C11 126.007 C7 N5 C11 107.778
C7 N8 C9 105.691 N8 C9 H10 121.246
N8 C9 C11 110.820 C9 C11 H12 132.925
H10 C9 C11 127.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.568      
2 H 0.178      
3 H 0.211      
4 H 0.178      
5 N -0.625      
6 H 0.348      
7 C 0.474      
8 N -0.471      
9 C -0.060      
10 H 0.156      
11 C 0.007      
12 H 0.172      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.498 3.588 -0.001 3.622
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.128 0.502 -0.001
y 0.502 -33.228 -0.002
z -0.001 -0.002 -37.190
Traceless
 xyz
x 5.082 0.502 -0.001
y 0.502 0.431 -0.002
z -0.001 -0.002 -5.512
Polar
3z2-r2-11.024
x2-y23.101
xy0.502
xz-0.001
yz-0.002


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.705 0.130 0.000
y 0.130 7.840 -0.000
z 0.000 -0.000 4.035


<r2> (average value of r2) Å2
<r2> 137.690
(<r2>)1/2 11.734