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

using model chemistry: B3LYPultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYPultrafine/6-31G*
 hartrees
Energy at 0K-267.147979
Energy at 298.15K-267.152023
HF Energy-267.147979
Nuclear repulsion energy159.385179
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 B3LYPultrafine/6-31G*
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' 3176 3043 5.61      
2 A' 3062 2933 0.08      
3 A' 2961 2836 91.69      
4 A' 1824 1747 78.95      
5 A' 1814 1738 112.72      
6 A' 1486 1424 14.22      
7 A' 1416 1357 34.26      
8 A' 1374 1316 3.34      
9 A' 1254 1201 26.12      
10 A' 1019 977 3.08      
11 A' 784 751 12.91      
12 A' 571 547 12.45      
13 A' 481 460 24.73      
14 A' 248 238 16.36      
15 A" 3120 2989 3.07      
16 A" 1491 1429 9.86      
17 A" 1081 1035 3.09      
18 A" 913 875 0.78      
19 A" 467 447 0.51      
20 A" 136 130 14.12      
21 A" 85 81 6.02      

Unscaled Zero Point Vibrational Energy (zpe) 14381.0 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 13777.0 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 B3LYPultrafine/6-31G*
ABC
0.30192 0.14697 0.10068

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.842 -0.730 0.000
C2 0.000 0.555 0.000
C3 1.498 0.394 0.000
O4 -0.360 -1.840 0.000
O5 -0.591 1.617 0.000
H6 -1.935 -0.539 0.000
H7 1.978 1.374 0.000
H8 1.813 -0.183 0.877
H9 1.813 -0.183 -0.877

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 H6 H7 H8 H9
C11.53662.59581.20942.36101.11013.51852.84952.8495
C21.53661.50652.42171.21542.22292.14092.14532.1453
C32.59581.50652.90542.42063.55751.09121.09631.0963
O41.20942.42172.90543.46462.04303.97422.87052.8705
O52.36101.21542.42063.46462.54072.58053.12883.1288
H61.11012.22293.55752.04302.54074.35573.86633.8663
H73.51852.14091.09123.97422.58054.35571.79431.7943
H82.84952.14531.09632.87053.12883.86631.79431.7549
H92.84952.14531.09632.87053.12883.86631.79431.7549

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 117.081 C1 C2 O5 117.695
C2 C1 O4 123.309 C2 C1 H6 113.274
C2 C3 H7 109.974 C2 C3 H8 110.018
C2 C3 H9 110.018 C3 C2 O5 125.224
O4 C1 H6 123.416 H7 C3 H8 110.219
H7 C3 H9 110.219 H8 C3 H9 106.333
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.186      
2 C 0.397      
3 C -0.526      
4 O -0.352      
5 O -0.407      
6 H 0.139      
7 H 0.184      
8 H 0.190      
9 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.951 -0.031 0.000 0.951
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.987 1.995 0.000
y 1.995 -37.132 0.000
z 0.000 0.000 -26.975
Traceless
 xyz
x 6.067 1.995 0.000
y 1.995 -10.651 0.000
z 0.000 0.000 4.585
Polar
3z2-r29.169
x2-y211.145
xy1.995
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.753 -0.388 0.000
y -0.388 6.324 0.000
z 0.000 0.000 3.271


<r2> (average value of r2) Å2
<r2> 112.300
(<r2>)1/2 10.597