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

using model chemistry: B1B95/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 B1B95/CEP-31G
 hartrees
Energy at 0K-45.876283
Energy at 298.15K-45.884162
Nuclear repulsion energy116.293712
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/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 3717 3559 47.13      
2 A 3316 3175 7.27      
3 A 3290 3150 2.98      
4 A 3205 3069 11.41      
5 A 3147 3013 37.11      
6 A 3070 2940 39.66      
7 A 1598 1530 50.02      
8 A 1532 1467 5.85      
9 A 1500 1437 2.64      
10 A 1495 1432 17.86      
11 A 1433 1372 3.55      
12 A 1420 1360 38.91      
13 A 1388 1329 1.26      
14 A 1298 1243 24.60      
15 A 1194 1144 5.52      
16 A 1128 1080 21.61      
17 A 1116 1069 17.35      
18 A 1071 1025 4.80      
19 A 999 957 8.78      
20 A 968 927 2.98      
21 A 915 876 3.38      
22 A 904 866 9.29      
23 A 777 744 73.25      
24 A 693 664 1.47      
25 A 680 651 142.27      
26 A 679 650 1.46      
27 A 632 606 0.61      
28 A 340 325 6.07      
29 A 260 249 8.24      
30 A 91 87 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 21927.9 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 20996.0 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/CEP-31G
ABC
0.28774 0.11651 0.08427

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.143 -0.023 0.000
H2 2.539 0.487 0.894
H3 2.515 -1.056 -0.001
H4 2.539 0.489 -0.893
N5 -0.170 1.069 0.000
H6 0.150 2.030 -0.000
C7 0.634 -0.069 -0.000
N8 -0.121 -1.179 -0.000
C9 -1.453 -0.743 0.000
H10 -2.277 -1.448 0.000
C11 -1.506 0.654 -0.000
H12 -2.336 1.352 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.10301.09771.10302.55722.86141.50912.54183.66694.64333.71124.6849
H21.10301.78401.78642.91082.98102.17623.26384.27175.26644.14605.0309
H31.09771.78401.78403.42383.88812.12432.63913.98034.80784.36995.4157
H41.10301.78641.78402.91022.97982.17623.26444.27215.26694.14585.0305
N52.55722.91083.42382.91021.01261.39292.24892.22063.28281.39952.1848
H62.86142.98103.88812.97981.01262.15373.22073.20294.24092.15282.5765
C71.50912.17622.12432.17621.39292.15371.34322.19343.22122.25923.2923
N82.54183.26382.63913.26442.24893.22071.34321.40142.17232.29803.3634
C93.66694.27173.98034.27212.22063.20292.19341.40141.08431.39862.2735
H104.64335.26644.80785.26693.28284.24093.22122.17231.08432.23932.8007
C113.71124.14604.36994.14581.39952.15282.25922.29801.39862.23931.0839
H124.68495.03095.41575.03052.18482.57653.29233.36342.27352.80071.0839

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 123.521 C1 C7 N8 125.935
H2 C1 H3 108.321 H2 C1 H4 108.150
H2 C1 C7 111.904 H3 C1 H4 108.323
H3 C1 C7 108.119 H4 C1 C7 111.906
N5 C7 N8 110.544 N5 C11 C9 105.050
N5 C11 H12 122.714 H6 N5 C7 126.380
H6 N5 C11 125.613 C7 N5 C11 108.007
C7 N8 C9 106.084 N8 C9 H10 121.307
N8 C9 C11 110.316 C9 C11 H12 132.237
H10 C9 C11 128.377
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.316      
2 H 0.140      
3 H 0.185      
4 H 0.140      
5 N -0.060      
6 H 0.335      
7 C -0.633      
8 N 0.229      
9 C -0.317      
10 H 0.296      
11 C -0.298      
12 H 0.298      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.471 4.110 -0.000 4.137
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.790 0.691 -0.000
y 0.691 -34.435 -0.001
z -0.000 -0.001 -37.930
Traceless
 xyz
x 6.392 0.691 -0.000
y 0.691 -0.575 -0.001
z -0.000 -0.001 -5.817
Polar
3z2-r2-11.634
x2-y24.645
xy0.691
xz-0.000
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.588 0.108 0.000
y 0.108 8.114 -0.000
z 0.000 -0.000 4.401


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000