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

using model chemistry: CCD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/aug-cc-pVDZ
 hartrees
Energy at 0K-229.367675
Energy at 298.15K-229.370332
HF Energy-228.615473
Nuclear repulsion energy141.360336
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 CCD/aug-cc-pVDZ
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 3344 45.61      
2 A' 3178 3065 7.80      
3 A' 3055 2947 1.54      
4 A' 2196 2118 43.76      
5 A' 1799 1735 166.95      
6 A' 1461 1409 12.69      
7 A' 1396 1346 33.43      
8 A' 1230 1186 128.47      
9 A' 997 961 17.09      
10 A' 753 726 18.09      
11 A' 639 616 44.57      
12 A' 584 563 6.67      
13 A' 433 417 2.18      
14 A' 156 151 4.11      
15 A" 3132 3021 5.61      
16 A" 1469 1416 7.80      
17 A" 1041 1004 3.90      
18 A" 648 625 40.68      
19 A" 571 551 0.30      
20 A" 198 191 0.68      
21 A" 140 135 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 14270.6 cm-1
Scaled (by 0.9645) Zero Point Vibrational Energy (zpe) 13764.0 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 CCD/aug-cc-pVDZ
ABC
0.33761 0.13161 0.09642

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.500 0.732 0.000
C2 0.000 0.510 0.000
O3 -0.814 1.415 0.000
C4 -0.436 -0.905 0.000
C5 -0.739 -2.090 0.000
H6 1.711 1.810 0.000
H7 1.943 0.253 0.890
H8 1.943 0.253 -0.890
H9 -1.041 -3.122 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 C5 H6 H7 H8 H9
C11.51632.41222.53493.60191.09901.10341.10344.6167
C21.51631.21731.48012.70252.14942.15272.15273.7786
O32.41221.21732.35053.50592.55553.12143.12144.5435
C42.53491.48012.35051.22323.46152.79142.79142.2989
C53.60192.70253.50591.22324.60593.67063.67061.0761
H61.09902.14942.55553.46154.60591.80871.80875.6489
H71.10342.15273.12142.79143.67061.80871.77934.5926
H81.10342.15273.12142.79143.67061.80871.77934.5926
H94.61673.77864.54352.29891.07615.64894.59264.5926

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 123.514 C1 C2 C4 115.548
C2 C1 H6 109.511 C2 C1 H7 109.506
C2 C1 H8 109.506 C2 C4 C5 177.219
O3 C2 C4 120.938 C4 C5 H9 178.018
H6 C1 H7 110.413 H6 C1 H8 110.413
H7 C1 H8 107.461
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability