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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-19.030870
Energy at 298.15K-19.034043
HF Energy-18.669920
Nuclear repulsion energy33.363147
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/CEP-31G*
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 3327 3158 0.02 120.53 0.19 0.32
2 A1 3125 2967 61.44 120.21 0.17 0.28
3 A1 1678 1594 18.18 27.61 0.11 0.20
4 A1 1532 1454 1.30 11.25 0.46 0.63
5 A1 1177 1118 0.05 18.06 0.17 0.29
6 A1 927 880 7.84 4.56 0.56 0.72
7 A2 1020 968 0.00 11.30 0.75 0.86
8 A2 827 785 0.00 3.66 0.75 0.86
9 B1 3221 3058 51.43 64.60 0.75 0.86
10 B1 1093 1038 1.32 2.26 0.75 0.86
11 B1 605 574 127.79 0.00 0.75 0.86
12 B2 3275 3109 0.18 58.01 0.75 0.86
13 B2 1064 1010 34.97 0.14 0.75 0.86
14 B2 1006 956 25.99 0.18 0.75 0.86
15 B2 789 749 21.09 15.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12332.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 11708.3 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/CEP-31G*
ABC
0.95066 0.70861 0.44303

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.879
C2 0.000 0.669 -0.510
C3 0.000 -0.669 -0.510
H4 0.000 1.616 -1.049
H5 0.000 -1.616 -1.049
H6 0.928 0.000 1.471
H7 -0.928 0.000 1.471

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.54081.54082.51512.51511.10091.1009
C21.54081.33751.09002.34752.28702.2870
C31.54081.33752.34751.09002.28702.2870
H42.51511.09002.34753.23193.13393.1339
H52.51512.34751.09003.23193.13393.1339
H61.10092.28702.28703.13393.13391.8559
H71.10092.28702.28703.13393.13391.8559

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.277 C1 C2 H4 145.374
C1 C3 C2 64.277 C1 C3 H5 145.374
C2 C1 C3 51.447 C2 C1 H6 118.994
C2 C1 H7 118.994 C2 C3 H5 150.349
C3 C1 H6 118.994 C3 C1 H7 118.994
C3 C2 H4 150.349 H6 C1 H7 114.899
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability