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

using model chemistry: MP2/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-264.745401
Energy at 298.15K-264.753147
HF Energy-263.877549
Nuclear repulsion energy223.600414
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/cc-pVDZ
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 3673 3498 63.86      
2 A 3321 3163 1.57      
3 A 3291 3135 4.14      
4 A 3215 3062 2.69      
5 A 3162 3012 15.83      
6 A 3081 2934 30.50      
7 A 1590 1514 24.42      
8 A 1525 1452 5.61      
9 A 1515 1443 4.69      
10 A 1482 1412 7.53      
11 A 1460 1391 30.80      
12 A 1431 1363 2.94      
13 A 1397 1330 1.03      
14 A 1292 1231 12.99      
15 A 1203 1146 1.22      
16 A 1130 1076 11.33      
17 A 1109 1057 16.38      
18 A 1058 1007 0.47      
19 A 999 951 9.52      
20 A 966 920 1.18      
21 A 918 875 3.15      
22 A 835 795 14.34      
23 A 713 679 39.87      
24 A 684 651 1.17      
25 A 683 651 0.16      
26 A 644 614 21.53      
27 A 523 498 56.86      
28 A 342 326 4.72      
29 A 247 235 5.07      
30 A 82 78 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 21784.2 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 20749.5 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/cc-pVDZ
ABC
0.29168 0.11938 0.08610

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.117 -0.022 0.000
H2 2.512 0.492 0.894
H3 2.491 -1.055 -0.001
H4 2.512 0.493 -0.893
N5 -0.167 1.055 0.000
H6 0.163 2.014 -0.001
C7 0.622 -0.070 0.000
N8 -0.123 -1.176 0.000
C9 -1.431 -0.734 -0.000
H10 -2.269 -1.431 -0.000
C11 -1.486 0.653 -0.000
H12 -2.312 1.362 0.001

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.10361.09901.10362.52512.82221.49612.52043.61964.60723.66634.6407
H21.10361.78701.78662.87922.93862.16463.24414.22515.23014.10004.9827
H31.09901.78701.78703.39363.85262.11302.61733.93574.77494.32895.3773
H41.10361.78661.78702.87892.93722.16463.24444.22525.23034.09974.9825
N52.52512.87923.39362.87891.01441.37362.23112.19113.25611.37942.1675
H62.82222.93863.85262.93721.01442.13403.20293.17754.21762.13842.5599
C71.49612.16462.11302.16461.37362.13401.33372.15833.19562.22883.2649
N82.52043.24412.61733.24442.23113.20291.33371.38062.16072.28103.3512
C93.61964.22513.93574.22522.19113.17752.15831.38061.08981.38862.2736
H104.60725.23014.77495.23033.25614.21763.19562.16071.08982.22692.7938
C113.66634.10004.32894.09971.37942.13842.22882.28101.38862.22691.0883
H124.64074.98275.37734.98252.16752.55993.26493.35122.27362.79381.0883

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 123.202 C1 C7 N8 125.812
H2 C1 H3 108.453 H2 C1 H4 108.081
H2 C1 C7 111.853 H3 C1 H4 108.453
H3 C1 C7 108.047 H4 C1 C7 111.850
N5 C7 N8 110.986 N5 C11 C9 104.664
N5 C11 H12 122.446 H6 N5 C7 125.996
H6 N5 C11 125.894 C7 N5 C11 108.110
C7 N8 C9 105.324 N8 C9 H10 121.564
N8 C9 C11 110.917 C9 C11 H12 132.890
H10 C9 C11 127.520
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability