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

using model chemistry: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-44.671835
Energy at 298.15K-44.680021
Nuclear repulsion energy117.303441
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-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 3951 3561 81.89      
2 A 3508 3162 11.48      
3 A 3480 3137 4.68      
4 A 3350 3019 19.80      
5 A 3287 2963 56.27      
6 A 3220 2903 55.82      
7 A 1745 1573 62.07      
8 A 1661 1497 9.02      
9 A 1630 1469 1.81      
10 A 1625 1465 14.83      
11 A 1569 1414 0.29      
12 A 1549 1396 48.39      
13 A 1490 1343 0.97      
14 A 1392 1255 25.62      
15 A 1256 1132 17.87      
16 A 1211 1092 2.12      
17 A 1189 1072 2.84      
18 A 1187 1070 33.44      
19 A 1092 985 17.21      
20 A 1055 951 7.02      
21 A 1015 915 7.00      
22 A 1006 906 2.95      
23 A 865 780 77.02      
24 A 755 680 13.55      
25 A 719 648 2.80      
26 A 697 629 163.28      
27 A 685 617 5.56      
28 A 366 330 6.62      
29 A 285 257 9.65      
30 A 91 82 0.29      

Unscaled Zero Point Vibrational Energy (zpe) 23464.1 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 21150.6 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-31G
ABC
0.29547 0.11761 0.08547

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.105 -0.047 0.000
H2 2.487 0.463 0.884
H3 2.478 -1.066 -0.001
H4 2.487 0.465 -0.883
N5 -0.195 1.043 0.000
H6 0.124 1.986 -0.001
C7 0.597 -0.088 -0.000
N8 -0.148 -1.177 -0.000
C9 -1.479 -0.750 -0.000
H10 -2.289 -1.448 0.000
C11 -1.529 0.626 0.000
H12 -2.350 1.312 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.09031.08461.09032.54532.83891.50862.52033.65254.61233.69604.6578
H21.09031.76691.76762.88332.94772.15853.22754.24125.22044.11584.9903
H31.08461.76691.76693.40433.85412.11972.62773.96944.78224.34945.3814
H41.09031.76761.76692.88272.94602.15853.22814.24155.22094.11564.9899
N52.54532.88333.40432.88270.99571.38052.22042.20523.25431.39742.1717
H62.83892.94773.85412.94600.99572.12723.17483.17114.19722.14012.5641
C71.50862.15852.11972.15851.38052.12721.31962.17933.19092.24293.2626
N82.52033.22752.62773.22812.22043.17481.31961.39832.15872.27183.3235
C93.65254.24123.96944.24152.20523.17112.17931.39831.06941.37752.2383
H104.61235.22044.78225.22093.25434.19723.19092.15871.06942.20962.7606
C113.69604.11584.34944.11561.39742.14012.24292.27181.37752.20961.0695
H124.65784.99035.38144.98992.17172.56413.26263.32352.23832.76061.0695

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 123.473 C1 C7 N8 125.904
H2 C1 H3 108.663 H2 C1 H4 108.307
H2 C1 C7 111.296 H3 C1 H4 108.662
H3 C1 C7 108.547 H4 C1 C7 111.298
N5 C7 N8 110.622 N5 C11 C9 105.256
N5 C11 H12 122.821 H6 N5 C7 126.307
H6 N5 C11 126.006 C7 N5 C11 107.687
C7 N8 C9 106.578 N8 C9 H10 121.467
N8 C9 C11 109.857 C9 C11 H12 131.923
H10 C9 C11 128.676
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.225      
2 H 0.111      
3 H 0.162      
4 H 0.111      
5 N -0.242      
6 H 0.384      
7 C -0.474      
8 N 0.090      
9 C -0.229      
10 H 0.269      
11 C -0.227      
12 H 0.270      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.514 4.179 -0.001 4.210
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.177 0.668 -0.001
y 0.668 -35.818 -0.004
z -0.001 -0.004 -38.948
Traceless
 xyz
x 7.206 0.668 -0.001
y 0.668 -1.255 -0.004
z -0.001 -0.004 -5.950
Polar
3z2-r2-11.901
x2-y25.641
xy0.668
xz-0.001
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.805 0.149 0.000
y 0.149 7.876 -0.000
z 0.000 -0.000 4.352


<r2> (average value of r2) Å2
<r2> 115.811
(<r2>)1/2 10.762