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All results from a given calculation for C3H3N2 (imidazolyl radical)

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-223.357623
Energy at 298.15K 
HF Energy-222.911332
Nuclear repulsion energy151.529959
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=FULL/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 A1 3337 3164 0.04      
2 A1 3306 3134 9.94      
3 A1 1496 1418 102.06      
4 A1 1352 1282 27.39      
5 A1 1076 1020 58.98      
6 A1 967 917 25.31      
7 A1 890 844 18.13      
8 A2 1056 1001 0.00      
9 A2 655 621 0.00      
10 B1 954 904 23.69      
11 B1 866 821 2.90      
12 B1 553 525 52.46      
13 B2 3287 3116 1.05      
14 B2 1565 1484 9.95      
15 B2 1319 1251 1.15      
16 B2 1215 1152 29.03      
17 B2 988 936 50.83      
18 B2 907i 859i 4.22      

Unscaled Zero Point Vibrational Energy (zpe) 11988.2 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 11364.8 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=FULL/3-21G*
ABC
0.34728 0.30078 0.16118

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.132
N2 0.000 1.185 0.360
N3 0.000 -1.185 0.360
C4 0.000 0.733 -0.879
C5 0.000 -0.733 -0.879
H6 0.000 0.000 2.208
H7 0.000 1.383 -1.740
H8 0.000 -1.383 -1.740

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.41401.41402.14022.14021.07623.18773.1877
N21.41402.36941.31892.28292.19532.10953.3172
N31.41402.36942.28291.31892.19533.31722.1095
C42.14021.31892.28291.46533.17291.07912.2842
C52.14022.28291.31891.46533.17292.28421.0791
H61.07622.19532.19533.17293.17294.18354.1835
H73.18772.10953.31721.07912.28424.18352.7661
H83.18773.31722.10952.28421.07914.18352.7661

picture of imidazolyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 103.043 C1 N3 C5 103.043
N2 C1 N3 113.826 N2 C1 H6 123.087
N2 C4 C5 110.044 N2 C4 H7 122.893
N3 C1 H6 123.087 N3 C5 C4 110.044
N3 C5 H8 122.893 C4 C5 H8 127.063
C5 C4 H7 127.063
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability