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 C4H7NO (2-Pyrrolidinone)

using model chemistry: MP3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP3/6-31+G**
 hartrees
Energy at 0K-285.814618
Energy at 298.15K 
HF Energy-284.891813
Nuclear repulsion energy240.066517
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 MP3/6-31+G**
Rotational Constants (cm-1) from geometry optimized at MP3/6-31+G**
ABC
0.24079 0.11543 0.08279

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.081 -1.095 -0.080
C2 0.904 -0.002 -0.009
C3 -0.004 1.218 0.144
C4 -1.406 0.694 -0.195
C5 -1.328 -0.809 0.138
O6 2.118 -0.014 -0.040
H7 0.474 -2.017 -0.022
H8 0.067 1.556 1.178
H9 0.339 2.027 -0.494
H10 -2.200 1.193 0.355
H11 -1.603 0.818 -1.259
H12 -1.628 -1.002 1.172
H13 -1.960 -1.410 -0.514

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13
N11.37012.32452.32861.45372.30701.00422.93423.15983.25902.80762.11982.1102
C21.37011.52842.42022.37841.21432.06012.13112.16163.34642.91892.96793.2315
C32.32451.52841.53472.42092.46033.27361.09111.08642.20672.16422.93663.3412
C42.32862.42021.53471.54143.59803.30342.19072.21671.08721.08912.19022.1988
C51.45372.37842.42091.54143.54142.17532.93623.35032.19402.16221.09401.0890
O62.30701.21432.46033.59803.54142.59152.85662.74514.50124.00284.05954.3368
H71.00422.06013.27363.30342.17532.59153.79134.07364.19443.72532.62152.5566
H82.93422.13111.09112.19072.93622.85663.79131.75922.43893.04513.06873.9711
H93.15982.16161.08642.21673.35032.74514.07361.75922.80492.41213.97824.1354
H103.25903.34642.20671.08722.19404.50124.19442.43892.80491.76152.41122.7541
H112.80762.91892.16421.08912.16224.00283.72533.04512.41211.76153.03762.3762
H122.11982.96792.93662.19021.09404.05952.62153.06873.97822.41123.03761.7665
H132.11023.23153.34122.19881.08904.33682.55663.97114.13542.75412.37621.7665

picture of 2-Pyrrolidinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 106.506 N1 C2 O6 126.314
N1 C5 C4 102.018 N1 C5 H12 111.845
N1 C5 H13 111.374 C2 N1 C5 114.732
C2 N1 H7 119.576 C2 C3 C4 104.392
C2 C3 H8 107.717 C2 C3 H9 110.376
C3 C2 O6 127.169 C3 C4 C5 103.810
C3 C4 H10 113.529 C3 C4 H11 109.978
C4 C3 H8 111.971 C4 C3 H9 114.411
C4 C5 H12 111.286 C4 C5 H13 112.276
C5 N1 H7 123.476 C5 C4 H10 112.004
C5 C4 H11 109.358 H8 C3 H9 107.779
H10 C4 H11 108.083 H12 C5 H13 108.038
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability