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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-45.655089
Energy at 298.15K-45.662634
HF Energy-44.806111
Nuclear repulsion energy117.083749
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 3651 3479 53.50      
2 A 3299 3143 4.20      
3 A 3275 3120 4.66      
4 A 3197 3046 5.49      
5 A 3145 2997 20.94      
6 A 3065 2921 34.80      
7 A 1573 1499 28.83      
8 A 1539 1466 0.10      
9 A 1515 1444 9.67      
10 A 1498 1427 4.07      
11 A 1459 1390 44.45      
12 A 1442 1374 0.78      
13 A 1402 1336 0.00      
14 A 1283 1223 15.60      
15 A 1198 1142 3.66      
16 A 1124 1071 11.07      
17 A 1114 1061 18.69      
18 A 1060 1010 0.00      
19 A 1005 958 11.36      
20 A 968 922 2.73      
21 A 915 871 3.05      
22 A 772 735 46.55      
23 A 678 646 22.62      
24 A 672 640 1.13      
25 A 646 616 4.53      
26 A 610 581 53.73      
27 A 498 475 50.67      
28 A 342 326 5.38      
29 A 231 220 5.31      
30 A 50 47 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 21612.4 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 20592.3 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
0.29104 0.11834 0.08549

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 -2.100 -0.043 0.000
H2 -2.487 0.469 -0.888
H3 -2.465 -1.072 -0.001
H4 -2.487 0.467 0.889
N5 0.196 1.040 -0.000
H6 -0.131 2.001 0.000
C7 -0.597 -0.089 -0.000
N8 0.155 -1.195 -0.000
C9 1.469 -0.751 0.000
H10 2.296 -1.450 0.000
C11 1.522 0.637 0.000
H12 2.342 1.343 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.09621.09171.09622.53802.83801.50332.53173.63834.61553.68534.6532
H21.09621.77801.77792.88342.94812.16183.24634.23445.23004.11054.9880
H31.09171.77801.77803.39703.85892.11112.62283.94744.77644.33825.3798
H41.09621.77791.77802.88402.94912.16183.24584.23415.22964.11074.9884
N52.53802.88343.39702.88401.01451.37932.23572.19753.25781.38682.1680
H62.83802.94813.85892.94911.01452.14093.20873.18274.21872.14312.5591
C71.50332.16182.11112.16181.37932.14091.33772.16963.19752.24013.2694
N82.53173.24632.62283.24582.23573.20871.33771.38752.15662.28623.3506
C93.63834.23443.94744.23412.19753.18272.16961.38751.08311.38852.2682
H104.61555.23004.77645.22963.25784.21873.19752.15661.08312.22562.7930
C113.68534.11054.33824.11071.38682.14312.24012.28621.38852.22561.0819
H124.65324.98805.37984.98842.16802.55913.26943.35062.26822.79301.0819

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 123.332 C1 C7 N8 125.932
H2 C1 H3 108.710 H2 C1 H4 108.379
H2 C1 C7 111.573 H3 C1 H4 108.708
H3 C1 C7 107.822 H4 C1 C7 111.574
N5 C7 N8 110.736 N5 C11 C9 104.709
N5 C11 H12 122.369 H6 N5 C7 126.172
H6 N5 C11 125.663 C7 N5 C11 108.165
C7 N8 C9 105.506 N8 C9 H10 121.103
N8 C9 C11 110.884 C9 C11 H12 132.922
H10 C9 C11 128.013
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability