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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-44.795662
Energy at 298.15K-44.803680
Nuclear repulsion energy118.056413
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 3924 3524 80.83      
2 A 3474 3120 10.44      
3 A 3444 3093 10.12      
4 A 3345 3004 17.58      
5 A 3286 2951 45.63      
6 A 3230 2900 50.73      
7 A 1766 1586 54.25      
8 A 1672 1501 14.34      
9 A 1630 1464 6.31      
10 A 1612 1448 8.25      
11 A 1575 1414 52.81      
12 A 1546 1388 8.30      
13 A 1495 1343 1.76      
14 A 1369 1229 16.33      
15 A 1260 1131 16.82      
16 A 1225 1100 0.10      
17 A 1173 1053 34.25      
18 A 1158 1040 0.66      
19 A 1088 977 11.40      
20 A 1044 938 5.43      
21 A 984 884 10.52      
22 A 983 883 2.94      
23 A 834 749 80.34      
24 A 748 672 5.99      
25 A 714 641 1.77      
26 A 677 608 11.07      
27 A 550 494 100.72      
28 A 364 327 5.23      
29 A 281 252 10.14      
30 A 75 67 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 23261.9 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 20889.2 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
0.29864 0.11954 0.08676

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 2.092 -0.046 0.000
H2 2.468 0.470 0.885
H3 2.470 -1.065 -0.000
H4 2.468 0.471 -0.885
N5 -0.191 1.032 -0.000
H6 0.137 1.975 -0.000
C7 0.580 -0.093 -0.000
N8 -0.149 -1.173 -0.000
C9 -1.462 -0.743 0.000
H10 -2.282 -1.440 0.000
C11 -1.516 0.626 0.000
H12 -2.335 1.321 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.09161.08651.09162.52502.81221.51292.50843.62204.59083.67004.6333
H21.09161.77211.77022.85862.91272.16013.21454.20755.19574.08424.9575
H31.08651.77211.77213.38783.83202.12522.62093.94514.76654.32945.3645
H41.09161.77021.77212.85842.91232.16013.21474.20775.19594.08424.9575
N52.52502.85863.38782.85840.99871.36372.20552.18323.23741.38572.1631
H62.81222.91273.83202.91230.99872.11493.16143.15384.18492.13402.5569
C71.51292.16012.12522.16011.36372.11491.30322.14323.16312.21563.2397
N82.50843.21452.62093.21472.20553.16141.30321.38202.14982.25933.3168
C93.62204.20753.94514.20772.18323.15382.14321.38201.07591.36972.2412
H104.59085.19574.76655.19593.23744.18493.16312.14981.07592.20282.7615
C113.67004.08424.32944.08421.38572.13402.21562.25931.36972.20281.0745
H124.63334.95755.36454.95752.16312.55693.23973.31682.24122.76151.0745

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 122.666 C1 C7 N8 125.771
H2 C1 H3 108.898 H2 C1 H4 108.350
H2 C1 C7 111.036 H3 C1 H4 108.900
H3 C1 C7 108.571 H4 C1 C7 111.038
N5 C7 N8 111.562 N5 C11 C9 104.805
N5 C11 H12 122.595 H6 N5 C7 126.384
H6 N5 C11 126.235 C7 N5 C11 107.380
C7 N8 C9 105.871 N8 C9 H10 121.511
N8 C9 C11 110.382 C9 C11 H12 132.600
H10 C9 C11 128.108
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 -0.214      
2 H 0.110      
3 H 0.157      
4 H 0.110      
5 N -0.076      
6 H 0.391      
7 C -0.587      
8 N 0.114      
9 C -0.210      
10 H 0.271      
11 C -0.342      
12 H 0.276      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.641 3.832 0.000 3.885
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.338 0.596 -0.000
y 0.596 -34.354 -0.000
z -0.000 -0.000 -38.383
Traceless
 xyz
x 6.031 0.596 -0.000
y 0.596 0.006 -0.000
z -0.000 -0.000 -6.036
Polar
3z2-r2-12.073
x2-y24.017
xy0.596
xz-0.000
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.991 0.092 0.000
y 0.092 7.967 0.000
z 0.000 0.000 4.612


<r2> (average value of r2) Å2
<r2> 114.199
(<r2>)1/2 10.686