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

using model chemistry: BLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/3-21G*
 hartrees
Energy at 0K-265.596896
Energy at 298.15K 
HF Energy-265.596896
Nuclear repulsion energy157.328207
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 BLYP/3-21G*
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' 3096 3076 7.00      
2 A' 2987 2967 0.02      
3 A' 2834 2816 124.13      
4 A' 1659 1649 39.85      
5 A' 1645 1634 48.48      
6 A' 1476 1467 16.32      
7 A' 1398 1389 42.94      
8 A' 1334 1325 2.20      
9 A' 1159 1152 32.17      
10 A' 973 967 1.52      
11 A' 733 728 17.32      
12 A' 550 547 7.65      
13 A' 449 446 15.46      
14 A' 246 245 17.53      
15 A" 3031 3012 2.98      
16 A" 1496 1486 12.77      
17 A" 1083 1076 5.17      
18 A" 923 917 0.38      
19 A" 489 486 0.20      
20 A" 190 189 10.50      
21 A" 75i 74i 2.88      

Unscaled Zero Point Vibrational Energy (zpe) 13838.7 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 13748.8 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 BLYP/3-21G*
ABC
0.29668 0.14358 0.09854

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.853 -0.713 0.000
C2 0.000 0.576 0.000
C3 1.500 0.327 0.000
O4 -0.368 -1.855 0.000
O5 -0.575 1.682 0.000
H6 -1.944 -0.477 0.000
H7 2.050 1.277 0.000
H8 1.774 -0.274 0.885
H9 1.774 -0.274 -0.885

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.54592.57271.24112.41071.11593.51912.80662.8066
C21.54591.52112.45931.24582.21082.16602.15722.1572
C32.57271.52112.87252.47843.53661.09741.10371.1037
O41.24112.45932.87253.54302.09333.95652.80562.8056
O52.41071.24582.47843.54302.55622.65543.18193.1819
H61.11592.21083.53662.09332.55624.36143.82703.8270
H73.51912.16601.09743.95652.65544.36141.80641.8064
H82.80662.15721.10372.80563.18193.82701.80641.7691
H92.80662.15721.10372.80563.18193.82701.80641.7691

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 114.037 C1 C2 O5 119.040
C2 C1 O4 123.507 C2 C1 H6 111.289
C2 C3 H7 110.579 C2 C3 H8 109.517
C2 C3 H9 109.517 C3 C2 O5 126.923
O4 C1 H6 125.204 H7 C3 H8 110.304
H7 C3 H9 110.304 H8 C3 H9 106.533
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.199      
2 C 0.318      
3 C -0.588      
4 O -0.366      
5 O -0.385      
6 H 0.169      
7 H 0.211      
8 H 0.221      
9 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.884 -0.087 0.000 0.889
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.549 1.589 0.000
y 1.589 -36.781 0.000
z 0.000 0.000 -27.369
Traceless
 xyz
x 5.526 1.589 0.000
y 1.589 -9.822 0.000
z 0.000 0.000 4.295
Polar
3z2-r28.591
x2-y210.232
xy1.589
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.535 -0.386 0.000
y -0.386 6.032 0.000
z 0.000 0.000 2.841


<r2> (average value of r2) Å2
<r2> 114.171
(<r2>)1/2 10.685