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

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-267.143055
Energy at 298.15K-267.147108
HF Energy-267.143055
Nuclear repulsion energy160.386440
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 mPW1PW91/6-311G*
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' 3190 3044 6.81      
2 A' 3073 2933 0.22      
3 A' 2968 2832 98.31      
4 A' 1851 1766 90.11      
5 A' 1838 1754 145.02      
6 A' 1477 1410 18.89      
7 A' 1410 1346 47.40      
8 A' 1371 1308 2.42      
9 A' 1262 1205 20.93      
10 A' 1020 973 3.86      
11 A' 797 760 12.98      
12 A' 578 552 12.39      
13 A' 485 463 25.81      
14 A' 246 235 16.46      
15 A" 3137 2994 3.69      
16 A" 1479 1411 13.19      
17 A" 1086 1037 3.68      
18 A" 911 869 0.70      
19 A" 474 452 0.15      
20 A" 133 127 16.05      
21 A" 73 70 5.69      

Unscaled Zero Point Vibrational Energy (zpe) 14428.7 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 13770.7 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 mPW1PW91/6-311G*
ABC
0.30581 0.14867 0.10189

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.835 -0.730 0.000
C2 0.000 0.554 0.000
C3 1.488 0.395 0.000
O4 -0.357 -1.828 0.000
O5 -0.588 1.606 0.000
H6 -1.927 -0.543 0.000
H7 1.968 1.371 0.000
H8 1.805 -0.181 0.873
H9 1.805 -0.181 -0.873

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53182.58081.19812.34831.10803.50272.83462.8346
C21.53181.49632.40931.20482.21802.13042.13552.1355
C32.58081.49632.88882.40353.54161.08771.09261.0926
O41.19812.40932.88883.44172.02913.95462.85532.8553
O52.34831.20482.40353.44172.53182.56703.11143.1114
H61.10802.21803.54162.02912.53184.34003.85033.8503
H73.50272.13041.08773.95462.56704.34001.78741.7874
H82.83462.13551.09262.85533.11143.85031.78741.7462
H92.83462.13551.09262.85533.11143.85031.78741.7462

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 116.916 C1 C2 O5 117.720
C2 C1 O4 123.440 C2 C1 H6 113.350
C2 C3 H7 110.063 C2 C3 H8 110.178
C2 C3 H9 110.178 C3 C2 O5 125.363
O4 C1 H6 123.210 H7 C3 H8 110.130
H7 C3 H9 110.130 H8 C3 H9 106.094
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.049      
2 C 0.241      
3 C -0.728      
4 O -0.260      
5 O -0.278      
6 H 0.201      
7 H 0.258      
8 H 0.259      
9 H 0.259      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.943 -0.053 0.000 0.945
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.084 2.082 0.000
y 2.082 -37.480 0.000
z 0.000 0.000 -27.236
Traceless
 xyz
x 6.274 2.082 0.000
y 2.082 -10.821 0.000
z 0.000 0.000 4.546
Polar
3z2-r29.093
x2-y211.397
xy2.082
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.038 -0.407 0.000
y -0.407 6.429 0.000
z 0.000 0.000 3.488


<r2> (average value of r2) Å2
<r2> 111.366
(<r2>)1/2 10.553