return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: SVWN/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at SVWN/3-21G
 hartrees
Energy at 0K-262.626891
Energy at 298.15K-262.634766
HF Energy-262.626891
Nuclear repulsion energy223.931643
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 SVWN/3-21G
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 3498 3435 40.20      
2 A 3241 3182 0.36      
3 A 3213 3155 2.33      
4 A 3106 3050 0.43      
5 A 3041 2986 8.64      
6 A 2982 2928 16.58      
7 A 1554 1526 50.96      
8 A 1494 1467 0.38      
9 A 1490 1463 13.98      
10 A 1470 1443 4.65      
11 A 1395 1370 10.37      
12 A 1373 1348 14.89      
13 A 1347 1323 8.94      
14 A 1269 1246 27.09      
15 A 1164 1143 3.88      
16 A 1110 1090 15.57      
17 A 1085 1066 15.70      
18 A 1057 1038 10.12      
19 A 990 973 9.90      
20 A 954 937 0.80      
21 A 929 913 3.93      
22 A 874 858 6.72      
23 A 739 726 33.52      
24 A 697 684 11.52      
25 A 684 672 1.27      
26 A 658 646 133.60      
27 A 650 638 2.34      
28 A 326 320 6.00      
29 A 251 247 6.96      
30 A 118 116 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 21379.3 cm-1
Scaled (by 0.9819) Zero Point Vibrational Energy (zpe) 20992.3 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 SVWN/3-21G
ABC
0.29438 0.11960 0.08646

See section I.F.4 to change rotational constant units
Geometric Data calculated at SVWN/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.079 -0.036 0.001
H2 2.468 0.143 1.013
H3 2.446 -1.003 -0.352
H4 2.459 0.755 -0.662
N5 -0.167 1.024 -0.001
H6 0.148 1.959 -0.001
C7 0.618 -0.056 -0.000
N8 -0.138 -1.128 -0.002
C9 -1.406 -0.722 0.001
H10 -2.238 -1.357 0.002
C11 -1.437 0.641 0.001
H12 -2.275 1.267 0.002

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.09851.09261.09992.48332.77681.46112.47123.55254.51523.58124.5447
H21.09851.78201.78332.95713.11612.11833.07124.09635.04174.06484.9776
H31.09261.78201.78503.32493.76522.08822.61003.87864.71094.23175.2498
H41.09991.78331.78502.72092.68862.11763.27514.19115.19323.95424.8077
N52.48332.95713.32492.72090.98671.33482.15252.14143.15631.32712.1222
H62.77683.11613.76522.68860.98672.06923.10073.09924.08562.06142.5198
C71.46112.11832.08822.11761.33482.06921.31202.13143.13902.17063.1810
N82.47123.07122.61003.27512.15253.10071.31201.33232.11322.19583.2100
C93.55254.09633.87864.19112.14143.09922.13141.33231.04671.36382.1700
H104.51525.04174.71095.19323.15634.08563.13902.11321.04672.15322.6241
C113.58124.06484.23173.95421.32712.06142.17062.19581.36382.15321.0451
H124.54474.97765.24984.80772.12222.51983.18103.21002.17002.62411.0451

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 125.233 C1 C7 N8 125.947
H2 C1 H3 108.838 H2 C1 H4 108.425
H2 C1 C7 110.906 H3 C1 H4 109.004
H3 C1 C7 108.857 H4 C1 C7 110.768
N5 C7 N8 108.820 N5 C11 C9 105.452
N5 C11 H12 126.509 H6 N5 C7 125.407
H6 N5 C11 125.334 C7 N5 C11 109.259
C7 N8 C9 107.415 N8 C9 H10 124.886
N8 C9 C11 109.054 C9 C11 H12 128.039
H10 C9 C11 126.060
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability