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All results from a given calculation for C3H4O2 (Methyl glyoxal)

using model chemistry: PBEPBE/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 PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-266.860294
Energy at 298.15K-266.864133
HF Energy-266.860294
Nuclear repulsion energy158.536504
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 PBEPBE/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3113 3095 3.25      
2 A' 2983 2965 0.07      
3 A' 2811 2795 117.17      
4 A' 1754 1744 127.44      
5 A' 1741 1731 58.94      
6 A' 1371 1363 14.84      
7 A' 1314 1307 45.22      
8 A' 1290 1283 0.53      
9 A' 1201 1194 17.15      
10 A' 961 956 3.30      
11 A' 769 765 13.77      
12 A' 550 547 10.18      
13 A' 462 459 20.95      
14 A' 238 236 14.39      
15 A" 3054 3037 0.67      
16 A" 1376 1368 10.57      
17 A" 1030 1024 2.66      
18 A" 855 850 1.39      
19 A" 452 449 0.01      
20 A" 132 131 9.42      
21 A" 27 27 5.72      

Unscaled Zero Point Vibrational Energy (zpe) 13741.9 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 13662.2 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 PBEPBE/cc-pVDZ
ABC
0.30037 0.14539 0.09979

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.839 -0.734 0.000
C2 0.000 0.560 0.000
C3 1.497 0.393 0.000
O4 -0.355 -1.851 0.000
O5 -0.595 1.630 0.000
H6 -1.951 -0.526 0.000
H7 1.995 1.378 0.000
H8 1.808 -0.201 0.884
H9 1.808 -0.201 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54192.59371.21762.37641.13083.53452.84172.8417
C21.54191.50602.43661.22482.23272.15602.15182.1518
C32.59371.50602.90942.43063.56811.10401.10971.1097
O41.21762.43662.90943.48932.07423.99362.86072.8607
O52.37641.22482.43063.48932.54692.60213.14853.1485
H61.13082.23273.56812.07422.54694.38113.87553.8755
H73.53452.15601.10403.99362.60214.38111.81971.8197
H82.84172.15181.10972.86073.14853.87551.81971.7680
H92.84172.15181.10972.86073.14853.87551.81971.7680

picture of Methyl glyoxal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 116.625 C1 C2 O5 117.936
C2 C1 O4 123.582 C2 C1 H6 112.395
C2 C3 H7 110.445 C2 C3 H8 109.772
C2 C3 H9 109.772 C3 C2 O5 125.439
O4 C1 H6 124.022 H7 C3 H8 110.568
H7 C3 H9 110.568 H8 C3 H9 105.608
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.145      
2 C -0.033      
3 C -0.033      
4 O -0.137      
5 O -0.149      
6 H 0.010      
7 H 0.054      
8 H 0.072      
9 H 0.072      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.021 -0.065 0.000 1.023
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.425 1.717 0.000
y 1.717 -36.321 0.000
z 0.000 0.000 -27.230
Traceless
 xyz
x 5.351 1.717 0.000
y 1.717 -9.494 0.000
z 0.000 0.000 4.143
Polar
3z2-r28.287
x2-y29.896
xy1.717
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.558 -0.261 0.000
y -0.261 6.579 0.000
z 0.000 0.000 3.481


<r2> (average value of r2) Å2
<r2> 113.093
(<r2>)1/2 10.635