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

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-45.248150
Energy at 298.15K-45.255630
HF Energy-44.674155
Nuclear repulsion energy115.086380
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 MP2/CEP-121G
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 3627 3540 42.32      
2 A 3245 3167 8.98      
3 A 3220 3142 2.34      
4 A 3111 3037 9.58      
5 A 3058 2985 31.98      
6 A 2972 2901 42.40      
7 A 1543 1506 38.39      
8 A 1531 1494 1.83      
9 A 1501 1465 11.00      
10 A 1463 1428 6.20      
11 A 1452 1417 2.86      
12 A 1388 1355 27.71      
13 A 1354 1321 4.01      
14 A 1283 1252 16.05      
15 A 1148 1120 11.85      
16 A 1108 1082 18.20      
17 A 1083 1057 0.09      
18 A 1070 1044 0.00      
19 A 987 963 18.17      
20 A 948 926 5.48      
21 A 911 889 1.33      
22 A 710 693 71.51      
23 A 657 641 1.67      
24 A 648 633 14.78      
25 A 611 596 5.27      
26 A 563 550 107.24      
27 A 496 484 11.17      
28 A 337 329 5.94      
29 A 202 197 3.12      
30 A 82 80 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 21154.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 20646.7 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 MP2/CEP-121G
ABC
0.28188 0.11377 0.08233

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.138 -0.042 0.000
H2 -2.532 0.470 -0.895
H3 -2.501 -1.079 -0.000
H4 -2.532 0.469 0.896
N5 0.202 1.061 -0.000
H6 -0.118 2.024 0.001
C7 -0.619 -0.085 -0.000
N8 0.151 -1.217 -0.000
C9 1.505 -0.763 0.000
H10 2.327 -1.472 0.000
C11 1.554 0.644 0.000
H12 2.381 1.349 -0.001

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.10381.09891.10382.58692.89041.52042.57303.71434.68853.75584.7280
H21.10381.78931.79082.93653.00822.18393.29294.31535.30864.18695.0700
H31.09891.78931.78933.44763.91352.12932.65574.01904.84384.40645.4521
H41.10381.79081.78932.93673.00802.18393.29264.31505.30824.18675.0703
N52.58692.93653.44762.93671.01491.40892.27822.24223.30671.41552.1978
H62.89043.00823.91353.00801.01492.16773.25213.22554.26642.16812.5879
C71.52042.18392.12932.18391.40892.16771.36882.22973.25592.29173.3239
N82.57303.29292.65573.29262.27823.25211.36881.42832.19072.33053.3986
C93.71434.31534.01904.31502.24223.22552.22971.42831.08521.40802.2858
H104.68855.30864.84385.30823.30674.26643.25592.19071.08522.25302.8215
C113.75584.18694.40644.18671.41552.16812.29172.33051.40802.25301.0858
H124.72805.07005.45215.07032.19782.58793.32393.39862.28582.82151.0858

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 124.001 C1 C7 N8 125.806
H2 C1 H3 108.650 H2 C1 H4 108.421
H2 C1 C7 111.677 H3 C1 H4 108.650
H3 C1 C7 107.681 H4 C1 C7 111.677
N5 C7 N8 110.193 N5 C11 C9 105.142
N5 C11 H12 122.417 H6 N5 C7 126.073
H6 N5 C11 125.460 C7 N5 C11 108.467
C7 N8 C9 105.696 N8 C9 H10 120.672
N8 C9 C11 110.502 C9 C11 H12 132.441
H10 C9 C11 128.826
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability