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 CH3CHO (Acetaldehyde)

using model chemistry: CID/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CID/cc-pVTZ
 hartrees
Energy at 0K-153.492969
Energy at 298.15K 
HF Energy-152.975740
Nuclear repulsion energy70.293951
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 CID/cc-pVTZ
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' 3253 3014 8.32      
2 A' 3134 2904 2.80      
3 A' 3036 2813 100.18      
4 A' 1925 1783 178.25      
5 A' 1522 1410 19.19      
6 A' 1491 1381 12.79      
7 A' 1444 1337 16.15      
8 A' 1181 1094 23.77      
9 A' 934 865 5.57      
10 A' 526 488 16.31      
11 A" 3203 2967 8.20      
12 A" 1534 1421 9.03      
13 A" 1196 1108 0.16      
14 A" 814 754 0.64      
15 A" 162 150 1.57      

Unscaled Zero Point Vibrational Energy (zpe) 12676.9 cm-1
Scaled (by 0.9265) Zero Point Vibrational Energy (zpe) 11745.1 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 CID/cc-pVTZ
ABC
1.93494 0.34396 0.30846

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.924 -0.716 0.000
O3 1.191 0.384 0.000
H4 -0.491 1.443 0.000
H5 -0.361 -1.639 0.000
H6 -1.567 -0.672 0.873
H7 -1.567 -0.672 -0.873

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49641.19381.09842.13012.12152.1215
C21.49642.38482.20251.08051.08521.0852
O31.19382.38481.98762.55033.08023.0802
H41.09842.20251.98763.08452.52872.5287
H52.13011.08052.55033.08451.77511.7751
H62.12151.08523.08022.52871.77511.7461
H72.12151.08523.08022.52871.77511.7461

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.469 C1 C2 H6 109.497
C1 C2 H7 109.497 C2 C1 O3 124.486
C2 C1 H4 115.318 O3 C1 H4 120.196
H5 C2 H6 110.095 H5 C2 H7 110.095
H6 C2 H7 107.124
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability