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 C3H4O (allenol)

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-191.391851
Energy at 298.15K-191.395174
HF Energy-190.781365
Nuclear repulsion energy101.979147
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/TZVP
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' 3832 3633 42.67      
2 A' 3257 3087 2.93      
3 A' 3166 3001 12.24      
4 A' 2051 1944 39.02      
5 A' 1522 1443 35.71      
6 A' 1439 1364 50.20      
7 A' 1288 1221 8.75      
8 A' 1207 1144 128.51      
9 A' 990 938 121.82      
10 A' 897 850 37.27      
11 A' 620 587 23.10      
12 A' 200 189 0.41      
13 A" 3251 3081 3.58      
14 A" 1039 985 1.95      
15 A" 899 853 30.19      
16 A" 624 592 0.39      
17 A" 357 338 110.51      
18 A" 228 216 7.84      

Unscaled Zero Point Vibrational Energy (zpe) 13432.8 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 12732.9 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/TZVP
ABC
1.45937 0.14509 0.13563

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.647 -0.499 0.000
C2 0.000 0.642 0.000
C3 -0.617 1.798 0.000
O4 0.093 -1.753 0.000
H5 1.728 -0.544 0.000
H6 -0.893 2.295 0.924
H7 -0.893 2.295 -0.924
H8 -0.866 -1.658 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.31172.62201.37101.08183.32163.32161.9062
C21.31171.31052.39682.09552.09382.09382.4576
C32.62201.31053.62143.31391.08491.08493.4649
O41.37102.39683.62142.03394.26774.26770.9642
H51.08182.09553.31392.03393.97243.97242.8237
H63.32162.09381.08494.26773.97241.84814.0596
H73.32162.09381.08494.26773.97241.84814.0596
H81.90622.45763.46490.96422.82374.05964.0596

picture of allenol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 178.532 C1 O4 H8 108.171
C2 C1 O4 126.601 C2 C1 H5 121.904
C2 C3 H6 121.595 C2 C3 H7 121.595
O4 C1 H5 111.494 H6 C3 H7 116.801
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability