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 C4H4N (pyrrolide radical)

using model chemistry: MP2=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at MP2=FULL/6-31+G**
 hartrees
Energy at 0K-208.896436
Energy at 298.15K-208.901138
HF Energy-208.210921
Nuclear repulsion energy151.443646
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/6-31+G**
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 3343 3140 0.52      
2 A1 3309 3108 0.04      
3 A1 1608 1510 22.92      
4 A1 1476 1387 30.73      
5 A1 1274 1196 16.28      
6 A1 1127 1058 44.02      
7 A1 1096 1029 2.72      
8 A1 898 843 9.17      
9 A2 885 831 0.00      
10 A2 827 777 0.00      
11 A2 482 453 0.00      
12 B1 882 828 1.32      
13 B1 706 663 79.00      
14 B1 563 528 30.31      
15 B2 18599 17468 0.00      
16 B2 3321 3119 66.53      
17 B2 3302 3101 65.77      
18 B2 1350 1268 104.44      
19 B2 1326 1245 50.22      
20 B2 1048 984 1.24      
21 B2 897 843 8.19      

Unscaled Zero Point Vibrational Energy (zpe) 24158.0 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 22689.2 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/6-31+G**
ABC
0.33426 0.29719 0.15732

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.242
C2 0.000 1.057 0.420
C3 0.000 -1.057 0.420
C4 0.000 0.688 -0.977
C5 0.000 -0.688 -0.977
H6 0.000 2.062 0.816
H7 0.000 -2.062 0.816
H8 0.000 1.359 -1.820
H9 0.000 -1.359 -1.820

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9
N11.33841.33842.32342.32342.10512.10513.35003.3500
C21.33842.11321.44562.23531.08003.14322.26093.2945
C31.33842.11322.23531.44563.14321.08003.29452.2609
C42.32341.44562.23531.37552.25903.28241.07732.2132
C52.32342.23531.44561.37553.28242.25902.21321.0773
H62.10511.08003.14322.25903.28244.12312.72824.3182
H72.10513.14321.08003.28242.25904.12314.31822.7282
H83.35002.26093.29451.07732.21322.72824.31822.7173
H93.35003.29452.26092.21321.07734.31822.72822.7173

picture of pyrrolide radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C4 113.081 N1 C2 H6 120.655
N1 C3 C5 113.081 N1 C3 H7 120.655
C2 N1 C3 104.272 C2 C4 C5 104.783
C2 C4 H8 126.699 C3 C5 C4 104.783
C3 C5 H9 126.699 C4 C2 H6 126.264
C4 C5 H9 128.518 C5 C3 H7 126.264
C5 C4 H8 128.518
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability