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 CH3COCCH (3-butyn-2-one)

using model chemistry: B2PLYP=FULL/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/STO-3G
 hartrees
Energy at 0K-226.675361
Energy at 298.15K-226.677870
HF Energy-226.559703
Nuclear repulsion energy138.936126
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 B2PLYP=FULL/STO-3G
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' 3704 3704 110.78      
2 A' 3537 3537 0.20      
3 A' 3347 3347 1.17      
4 A' 2300 2300 82.31      
5 A' 1763 1763 19.37      
6 A' 1676 1676 10.42      
7 A' 1555 1555 2.64      
8 A' 1246 1246 121.07      
9 A' 1061 1061 21.89      
10 A' 755 755 13.93      
11 A' 751 751 15.83      
12 A' 606 606 6.79      
13 A' 420 420 1.08      
14 A' 170 170 1.26      
15 A" 3518 3518 0.04      
16 A" 1679 1679 4.48      
17 A" 1119 1119 4.51      
18 A" 767 767 13.25      
19 A" 591 591 1.10      
20 A" 246 246 0.68      
21 A" 127 127 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 15467.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15467.9 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 B2PLYP=FULL/STO-3G
ABC
0.31801 0.12867 0.09323

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.551 0.704 0.000
C2 0.000 0.508 0.000
O3 -0.821 1.465 0.000
C4 -0.437 -0.929 0.000
C5 -0.794 -2.089 0.000
H6 1.790 1.778 0.000
H7 1.988 0.231 0.892
H8 1.988 0.231 -0.892
H9 -1.112 -3.121 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 C5 H6 H7 H8 H9
C11.56312.49092.57333.64681.09961.10101.10104.6609
C21.56311.26081.50262.71552.19462.19682.19683.7956
O32.49091.26082.42473.55352.63013.19563.19564.5947
C42.57331.50262.42471.21293.50572.83282.83282.2930
C53.64682.71553.55351.21294.65043.73043.73041.0801
H61.09962.19462.63013.50574.65041.79691.79695.6938
H71.10102.19683.19562.83283.73041.79691.78494.6521
H81.10102.19683.19562.83283.73041.79691.78494.6521
H94.66093.79564.59472.29301.08015.69384.65214.6521

picture of 3-butyn-2-one state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 123.434 C1 C2 C4 114.135
C2 C1 H6 109.789 C2 C1 H7 109.880
C2 C1 H8 109.880 C2 C4 C5 179.821
O3 C2 C4 122.431 C4 C5 H9 179.956
H6 C1 H7 109.479 H6 C1 H8 109.479
H7 C1 H8 108.311
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability