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

using model chemistry: BLYP/6-311G**

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/6-311G**
 hartrees
Energy at 0K-267.158375
Energy at 298.15K-267.162247
HF Energy-267.158375
Nuclear repulsion energy158.227126
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/6-311G**
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' 3073 3061 8.09      
2 A' 2965 2954 0.21      
3 A' 2808 2797 123.55      
4 A' 1720 1713 140.65      
5 A' 1702 1695 54.08      
6 A' 1422 1416 15.62      
7 A' 1347 1341 36.63      
8 A' 1312 1307 1.54      
9 A' 1180 1175 25.76      
10 A' 973 969 1.63      
11 A' 738 735 16.31      
12 A' 545 543 14.41      
13 A' 463 462 19.89      
14 A' 239 238 14.34      
15 A" 3013 3002 4.73      
16 A" 1425 1419 10.69      
17 A" 1039 1035 2.56      
18 A" 873 869 0.38      
19 A" 452 450 0.09      
20 A" 123 122 12.58      
21 A" 51 50 5.39      

Unscaled Zero Point Vibrational Energy (zpe) 13729.7 cm-1
Scaled (by 0.9961) Zero Point Vibrational Energy (zpe) 13676.2 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 BLYP/6-311G**
ABC
0.29838 0.14408 0.09894

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.842 -0.745 0.000
C2 0.000 0.561 0.000
C3 1.508 0.412 0.000
O4 -0.360 -1.860 0.000
O5 -0.602 1.625 0.000
H6 -1.943 -0.545 0.000
H7 1.982 1.399 0.000
H8 1.830 -0.167 0.879
H9 1.830 -0.167 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.55462.61981.21472.38221.11883.54592.87162.8716
C21.55461.51572.44821.22202.23542.15162.15682.1568
C32.61981.51572.94152.43423.58111.09501.10061.1006
O41.21472.44822.94153.49342.05824.01342.90432.9043
O52.38221.22202.43423.49342.55012.59373.14603.1460
H61.11882.23543.58112.05822.55014.37943.89193.8919
H73.54592.15161.09504.01342.59374.37941.80251.8025
H82.87162.15681.10062.90433.14603.89191.80251.7586
H92.87162.15681.10062.90433.14603.89191.80251.7586

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 117.133 C1 C2 O5 117.684
C2 C1 O4 123.817 C2 C1 H6 112.458
C2 C3 H7 109.956 C2 C3 H8 110.029
C2 C3 H9 110.029 C3 C2 O5 125.183
O4 C1 H6 123.725 H7 C3 H8 110.355
H7 C3 H9 110.355 H8 C3 H9 106.051
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.127      
2 C 0.115      
3 C -0.280      
4 O -0.218      
5 O -0.232      
6 H 0.091      
7 H 0.130      
8 H 0.134      
9 H 0.134      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.989 -0.036 0.000 0.990
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.775 1.982 0.000
y 1.982 -37.543 0.000
z 0.000 0.000 -27.590
Traceless
 xyz
x 5.791 1.982 0.000
y 1.982 -10.361 0.000
z 0.000 0.000 4.569
Polar
3z2-r29.138
x2-y210.768
xy1.982
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.691 -0.279 0.000
y -0.279 6.825 0.000
z 0.000 0.000 3.663


<r2> (average value of r2) Å2
<r2> 114.274
(<r2>)1/2 10.690