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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-225.171501
Energy at 298.15K-225.177308
HF Energy-224.691287
Nuclear repulsion energy155.602156
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/LANL2DZ
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' 3282 3161 8.67      
2 A' 3243 3124 6.87      
3 A' 3067 2954 2.32      
4 A' 1488 1433 11.91      
5 A' 1468 1414 23.05      
6 A' 1407 1355 2.90      
7 A' 1287 1240 14.85      
8 A' 1268 1222 2.98      
9 A' 1264 1218 13.09      
10 A' 964 929 39.95      
11 A' 930 896 3.48      
12 A' 909 875 1.28      
13 A' 826 796 13.88      
14 A' 809 779 7.57      
15 A" 3136 3021 3.68      
16 A" 1135 1093 0.21      
17 A" 1011 973 20.05      
18 A" 907 873 0.62      
19 A" 752 724 19.42      
20 A" 557 536 19.60      
21 A" 383 369 9.63      

Unscaled Zero Point Vibrational Energy (zpe) 15046.5 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 14491.3 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/LANL2DZ
ABC
0.29791 0.27623 0.14743

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.237 0.362 0.000
C2 0.000 1.189 0.000
N3 1.150 0.525 0.000
C4 0.754 -0.943 0.000
C5 -0.785 -0.893 0.000
H6 -0.085 2.273 0.000
H7 1.172 -1.428 0.900
H8 1.172 -1.428 -0.900
H9 -1.463 -1.747 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.48822.39282.38141.33452.23133.13373.13372.1216
C21.48821.32782.26212.22571.08703.00543.00543.2808
N32.39281.32781.52102.39942.13992.15042.15043.4630
C42.38142.26211.52101.54033.32391.10421.10422.3585
C51.33452.22572.39941.54033.24282.21982.21981.0903
H62.23131.08702.13993.32393.24284.01054.01054.2499
H73.13373.00542.15041.10422.21984.01051.80012.8031
H83.13373.00542.15041.10422.21984.01051.80012.8031
H92.12163.28083.46302.35851.09034.24992.80312.8031

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 116.240 N1 C2 H6 119.279
N1 C5 C4 111.662 N1 C5 H9 121.757
C2 N1 C5 103.956 C2 N3 C4 104.924
N3 C2 H6 124.481 N3 C4 C5 103.218
N3 C4 H7 108.961 N3 C4 H8 108.961
C4 C5 H9 126.582 C5 C4 H7 113.119
C5 C4 H8 113.119 H7 C4 H8 109.192
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability