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All results from a given calculation for CH3COCCH (3-butyn-2-one)

using model chemistry: QCISD(T)=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-229.344404
Energy at 298.15K-229.347047
HF Energy-228.584020
Nuclear repulsion energy141.647278
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 QCISD(T)=FULL/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3467 3467        
2 A' 3176 3176        
3 A' 3059 3059        
4 A' 2164 2164        
5 A' 1765 1765        
6 A' 1511 1511        
7 A' 1433 1433        
8 A' 1242 1242        
9 A' 1010 1010        
10 A' 751 751        
11 A' 601 601        
12 A' 565 565        
13 A' 438 438        
14 A' 170 170        
15 A" 3132 3132        
16 A" 1511 1511        
17 A" 1066 1066        
18 A" 620 620        
19 A" 575 575        
20 A" 234 234        
21 A" 134 134        

Unscaled Zero Point Vibrational Energy (zpe) 14312.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14312.5 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 QCISD(T)=FULL/6-31G*
ABC
0.33845 0.13249 0.09695

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.488 0.763 0.000
C2 0.000 0.499 0.000
O3 -0.843 1.389 0.000
C4 -0.399 -0.913 0.000
C5 -0.723 -2.089 0.000
H6 1.663 1.843 0.000
H7 1.949 0.305 0.885
H8 1.949 0.305 -0.885
H9 -1.020 -3.118 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 C5 H6 H7 H8 H9
C11.51132.41362.52363.60801.09431.09831.09834.6203
C21.51131.22571.46732.68672.13802.14992.14993.7577
O32.41361.22572.34443.47972.54643.12343.12344.5101
C42.52361.46732.34441.21943.44182.78962.78962.2904
C53.60802.68673.47971.21944.59873.69513.69511.0710
H61.09432.13802.54643.44184.59871.79761.79765.6395
H71.09832.14993.12342.78963.69511.79761.77094.6168
H81.09832.14993.12342.78963.69511.79761.77094.6168
H94.62033.75774.51012.29041.07105.63954.61684.6168

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 123.395 C1 C2 C4 115.820
C2 C1 H6 109.229 C2 C1 H7 109.930
C2 C1 H8 109.930 C2 C4 C5 179.629
O3 C2 C4 120.785 C4 C5 H9 179.292
H6 C1 H7 110.141 H6 C1 H8 110.141
H7 C1 H8 107.452
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability