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

using model chemistry: HF/SDD

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/SDD
 hartrees
Energy at 0K-263.771850
Energy at 298.15K-263.780066
Nuclear repulsion energy224.773165
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/SDD
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 3948 3554 89.20      
2 A 3516 3166 7.66      
3 A 3489 3141 3.65      
4 A 3340 3007 11.69      
5 A 3274 2948 37.33      
6 A 3206 2886 44.95      
7 A 1752 1578 67.02      
8 A 1658 1493 5.21      
9 A 1640 1477 9.14      
10 A 1640 1477 11.21      
11 A 1577 1420 1.17      
12 A 1558 1403 50.07      
13 A 1493 1344 2.25      
14 A 1398 1259 24.81      
15 A 1261 1135 17.40      
16 A 1215 1094 3.67      
17 A 1198 1079 3.86      
18 A 1189 1071 33.09      
19 A 1099 990 17.75      
20 A 1062 956 8.16      
21 A 1023 921 4.95      
22 A 1017 915 1.82      
23 A 866 780 78.42      
24 A 763 687 22.01      
25 A 723 651 2.31      
26 A 714 643 151.97      
27 A 694 625 11.45      
28 A 371 334 6.88      
29 A 284 256 9.41      
30 A 94 85 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 23529.9 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 21186.3 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 HF/SDD
ABC
0.30030 0.11895 0.08656

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.120 -0.027 0.000
H2 2.502 0.481 0.879
H3 2.495 -1.039 -0.001
H4 2.502 0.483 -0.878
N5 -0.164 1.053 0.000
H6 0.154 1.992 -0.001
C7 0.627 -0.070 -0.000
N8 -0.117 -1.150 -0.000
C9 -1.443 -0.726 0.000
H10 -2.248 -1.422 0.000
C11 -1.491 0.636 0.000
H12 -2.310 1.316 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.08471.07901.08472.52672.81801.49412.50303.63114.58553.67174.6290
H21.08471.75621.75702.86482.92722.14303.20794.21795.19184.09154.9618
H31.07901.75621.75633.38333.82952.10482.61443.95074.75884.32395.3509
H41.08471.75701.75632.86412.92532.14303.20854.21835.19244.09124.9615
N52.52672.86483.38332.86410.99171.37332.20332.19063.23501.39082.1616
H62.81802.92723.82952.92530.99172.11533.15363.15244.17422.13202.5550
C71.49412.14302.10482.14301.37332.11531.31122.17113.17672.23243.2470
N82.50303.20792.61443.20852.20333.15361.31121.39242.14862.25363.2999
C93.63114.21793.95074.21832.19063.15242.17111.39241.06411.36282.2181
H104.58555.19184.75885.19243.23504.17423.17672.14861.06412.19262.7382
C113.67174.09154.32394.09121.39082.13202.23242.25361.36282.19261.0641
H124.62904.96185.35094.96152.16162.55503.24703.29992.21812.73821.0641

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 123.518 C1 C7 N8 126.187
H2 C1 H3 108.526 H2 C1 H4 108.172
H2 C1 C7 111.418 H3 C1 H4 108.527
H3 C1 C7 108.697 H4 C1 C7 111.420
N5 C7 N8 110.296 N5 C11 C9 105.410
N5 C11 H12 122.859 H6 N5 C7 126.110
H6 N5 C11 126.160 C7 N5 C11 107.730
C7 N8 C9 106.806 N8 C9 H10 121.430
N8 C9 C11 109.759 C9 C11 H12 131.731
H10 C9 C11 128.812
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.641      
2 H 0.193      
3 H 0.240      
4 H 0.193      
5 N -0.610      
6 H 0.378      
7 C 0.392      
8 N -0.274      
9 C -0.205      
10 H 0.227      
11 C -0.126      
12 H 0.232      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.549 4.108 -0.001 4.145
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.287 0.760 -0.001
y 0.760 -35.739 -0.004
z -0.001 -0.004 -39.178
Traceless
 xyz
x 7.171 0.760 -0.001
y 0.760 -1.006 -0.004
z -0.001 -0.004 -6.165
Polar
3z2-r2-12.329
x2-y25.451
xy0.760
xz-0.001
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.682 0.153 0.000
y 0.153 7.807 -0.000
z 0.000 -0.000 4.129


<r2> (average value of r2) Å2
<r2> 139.951
(<r2>)1/2 11.830