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

using model chemistry: B1B95/STO-3G

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/STO-3G
 hartrees
Energy at 0K-262.116850
Energy at 298.15K-262.124247
Nuclear repulsion energy220.717479
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/STO-3G
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 3793 3349 49.12      
2 A 3550 3135 16.25      
3 A 3519 3107 1.82      
4 A 3516 3105 15.91      
5 A 3478 3071 0.07      
6 A 3327 2938 0.78      
7 A 1680 1483 28.09      
8 A 1669 1473 0.74      
9 A 1658 1464 7.32      
10 A 1621 1432 5.88      
11 A 1556 1374 1.73      
12 A 1535 1356 16.77      
13 A 1495 1320 2.02      
14 A 1327 1172 23.62      
15 A 1205 1064 1.42      
16 A 1181 1043 5.00      
17 A 1142 1008 8.90      
18 A 1141 1007 4.70      
19 A 1057 933 0.97      
20 A 1000 883 2.49      
21 A 937 828 1.49      
22 A 913 807 1.78      
23 A 781 689 18.96      
24 A 692 611 1.61      
25 A 662 584 0.52      
26 A 646 570 13.24      
27 A 490 433 75.62      
28 A 336 297 3.30      
29 A 255 225 3.58      
30 A 101 89 0.51      

Unscaled Zero Point Vibrational Energy (zpe) 23129.6 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 20423.4 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/STO-3G
ABC
0.28444 0.11625 0.08384

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.147 -0.016 0.000
H2 2.528 0.503 0.893
H3 2.536 -1.042 -0.001
H4 2.528 0.505 -0.891
N5 -0.170 1.072 0.000
H6 0.159 2.059 -0.001
C7 0.632 -0.078 -0.000
N8 -0.119 -1.209 -0.000
C9 -1.455 -0.723 -0.000
H10 -2.299 -1.417 0.000
C11 -1.506 0.649 0.000
H12 -2.332 1.362 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.10071.09711.10072.55942.87331.51552.56083.67034.66143.71274.6859
H21.10071.78481.78382.89792.97122.17433.27664.26185.27104.13405.0152
H31.09711.78481.78483.43383.90702.13382.66114.00394.85024.38165.4294
H41.10071.78381.78482.89732.96932.17433.27724.26215.27164.13375.0148
N52.55942.89793.43382.89731.04091.40232.28092.20733.27481.40132.1814
H62.87332.97123.90702.96931.04092.18913.27963.21664.25732.18242.5872
C71.51552.17432.13382.17431.40232.18911.35762.18463.22272.25873.2958
N82.56083.27662.66113.27722.28093.27961.35761.42092.18982.31793.3916
C93.67034.26184.00394.26212.20733.21662.18461.42091.09261.37292.2620
H104.66145.27104.85025.27163.27484.25733.22272.18981.09262.21232.7784
C113.71274.13404.38164.13371.40132.18242.25872.31791.37292.21231.0912
H124.68595.01525.42945.01482.18142.58723.29583.39162.26202.77841.0912

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 122.557 C1 C7 N8 125.983
H2 C1 H3 108.598 H2 C1 H4 108.247
H2 C1 C7 111.432 H3 C1 H4 108.600
H3 C1 C7 108.454 H4 C1 C7 111.433
N5 C7 N8 111.459 N5 C11 C9 105.428
N5 C11 H12 121.634 H6 N5 C7 126.638
H6 N5 C11 126.017 C7 N5 C11 107.344
C7 N8 C9 103.652 N8 C9 H10 120.638
N8 C9 C11 112.116 C9 C11 H12 132.938
H10 C9 C11 127.247
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.240      
2 H 0.089      
3 H 0.108      
4 H 0.089      
5 N -0.272      
6 H 0.232      
7 C 0.148      
8 N -0.252      
9 C -0.049      
10 H 0.085      
11 C -0.031      
12 H 0.094      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.522 3.523 -0.001 3.562
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.203 0.322 -0.001
y 0.322 -31.760 -0.003
z -0.001 -0.003 -34.287
Traceless
 xyz
x 3.820 0.322 -0.001
y 0.322 -0.015 -0.003
z -0.001 -0.003 -3.806
Polar
3z2-r2-7.611
x2-y22.557
xy0.322
xz-0.001
yz-0.003


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.315 0.228 -0.000
y 0.228 5.005 -0.000
z -0.000 -0.000 1.567


<r2> (average value of r2) Å2
<r2> 141.707
(<r2>)1/2 11.904