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

using model chemistry: B1B95/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/STO-3G
 hartrees
Energy at 0K-263.545208
Energy at 298.15K-263.548843
HF Energy-263.545208
Nuclear repulsion energy155.787090
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 B1B95/STO-3G
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' 3537 3123 1.01      
2 A' 3345 2954 2.59      
3 A' 3228 2851 28.61      
4 A' 1861 1643 10.85      
5 A' 1845 1629 12.95      
6 A' 1653 1459 7.87      
7 A' 1534 1354 10.61      
8 A' 1426 1259 17.57      
9 A' 1270 1121 36.56      
10 A' 1066 941 4.16      
11 A' 798 705 5.83      
12 A' 576 509 4.90      
13 A' 459 405 11.96      
14 A' 213 188 5.98      
15 A" 3510 3099 0.79      
16 A" 1652 1459 6.35      
17 A" 1106 976 6.10      
18 A" 904 799 0.41      
19 A" 458 404 0.14      
20 A" 133 118 5.67      
21 A" 42 37 1.56      

Unscaled Zero Point Vibrational Energy (zpe) 15307.1 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 13516.2 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 B1B95/STO-3G
ABC
0.29320 0.13897 0.09599

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.880 -0.722 0.000
C2 0.000 0.577 0.000
C3 1.526 0.329 0.000
O4 -0.411 -1.877 0.000
O5 -0.536 1.705 0.000
H6 -1.982 -0.502 0.000
H7 2.069 1.281 0.000
H8 1.807 -0.254 0.888
H9 1.807 -0.254 -0.888

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.56872.62541.24652.45131.12313.56472.86882.8688
C21.56871.54592.48771.24912.25602.18532.17812.1781
C32.62541.54592.93562.47883.60451.09621.09831.0983
O41.24652.48772.93563.58412.08714.01532.88892.8889
O52.45131.24912.47883.58412.63852.63863.18043.1804
H61.12312.25603.60452.08712.63854.42533.89943.8994
H73.56472.18531.09624.01532.63864.42531.79211.7921
H82.86882.17811.09832.88893.18043.89941.79211.7752
H92.86882.17811.09832.88893.18043.89941.79211.7752

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 114.901 C1 C2 O5 120.479
C2 C1 O4 123.780 C2 C1 H6 112.834
C2 C3 H7 110.449 C2 C3 H8 109.757
C2 C3 H9 109.757 C3 C2 O5 124.621
O4 C1 H6 123.386 H7 C3 H8 109.501
H7 C3 H9 109.501 H8 C3 H9 107.832
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.069      
2 C 0.143      
3 C -0.252      
4 O -0.155      
5 O -0.165      
6 H 0.074      
7 H 0.094      
8 H 0.096      
9 H 0.096      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.476 -0.051 0.000 0.479
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.640 1.139 0.000
y 1.139 -32.276 0.000
z 0.000 0.000 -25.037
Traceless
 xyz
x 4.017 1.139 0.000
y 1.139 -7.438 0.000
z 0.000 0.000 3.421
Polar
3z2-r26.842
x2-y27.636
xy1.139
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.099 -0.296 0.000
y -0.296 4.075 0.000
z 0.000 0.000 1.484


<r2> (average value of r2) Å2
<r2> 114.877
(<r2>)1/2 10.718