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

using model chemistry: mPW1PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-267.097453
Energy at 298.15K-267.101482
HF Energy-267.097453
Nuclear repulsion energy160.399716
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 mPW1PW91/6-31G(2df,p)
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' 3200 3055 3.68      
2 A' 3074 2935 0.02      
3 A' 2959 2825 81.89      
4 A' 1858 1774 94.83      
5 A' 1847 1763 109.27      
6 A' 1453 1387 14.40      
7 A' 1389 1326 41.90      
8 A' 1364 1302 1.68      
9 A' 1260 1203 20.40      
10 A' 1011 965 4.58      
11 A' 796 760 12.67      
12 A' 575 549 10.86      
13 A' 478 456 26.07      
14 A' 242 231 16.40      
15 A" 3147 3005 0.96      
16 A" 1461 1394 9.68      
17 A" 1088 1039 3.06      
18 A" 907 866 1.17      
19 A" 471 450 0.36      
20 A" 136 130 14.17      
21 A" 66 63 5.67      

Unscaled Zero Point Vibrational Energy (zpe) 14390.6 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 13738.7 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 mPW1PW91/6-31G(2df,p)
ABC
0.30556 0.14895 0.10200

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.837 -0.726 0.000
C2 0.000 0.555 0.000
C3 1.489 0.387 0.000
O4 -0.359 -1.825 0.000
O5 -0.585 1.609 0.000
H6 -1.929 -0.529 0.000
H7 1.976 1.360 0.000
H8 1.795 -0.195 0.874
H9 1.795 -0.195 -0.874

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53062.57861.19882.34851.10923.50252.82422.8242
C21.53061.49832.40751.20482.21272.13382.13282.1328
C32.57861.49832.88242.40673.53821.08851.09351.0935
O41.19882.40752.88243.44152.03583.94972.83982.8398
O52.34851.20482.40673.44152.52532.57273.11113.1111
H61.10922.21273.53822.03582.52534.33793.83983.8398
H73.50252.13381.08853.94972.57274.33791.79261.7926
H82.82422.13281.09352.83983.11113.83981.79261.7481
H92.82422.13281.09352.83983.11113.83981.79261.7481

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 116.706 C1 C2 O5 117.817
C2 C1 O4 123.330 C2 C1 H6 112.928
C2 C3 H7 110.141 C2 C3 H8 109.763
C2 C3 H9 109.763 C3 C2 O5 125.477
O4 C1 H6 123.742 H7 C3 H8 110.482
H7 C3 H9 110.482 H8 C3 H9 106.133
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.076      
2 C 0.316      
3 C -0.551      
4 O -0.233      
5 O -0.289      
6 H 0.134      
7 H 0.176      
8 H 0.186      
9 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.943 -0.042 0.000 0.944
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.659 1.968 0.000
y 1.968 -36.557 0.000
z 0.000 0.000 -26.779
Traceless
 xyz
x 6.009 1.968 0.000
y 1.968 -10.338 0.000
z 0.000 0.000 4.328
Polar
3z2-r28.657
x2-y210.898
xy1.968
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.045 -0.268 0.000
y -0.268 6.422 0.000
z 0.000 0.000 3.645


<r2> (average value of r2) Å2
<r2> 110.873
(<r2>)1/2 10.530