return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H10O2 (Ethane, 1,2-dimethoxy-)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-58.992696
Energy at 298.15K-59.004401
Nuclear repulsion energy144.087883
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 HF/CEP-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 Ag 3345 3016 0.00      
2 Ag 3229 2910 0.00      
3 Ag 3194 2879 0.00      
4 Ag 1665 1501 0.00      
5 Ag 1642 1480 0.00      
6 Ag 1614 1455 0.00      
7 Ag 1576 1421 0.00      
8 Ag 1332 1200 0.00      
9 Ag 1254 1130 0.00      
10 Ag 1167 1052 0.00      
11 Ag 1055 951 0.00      
12 Ag 404 364 0.00      
13 Ag 329 297 0.00      
14 Au 3299 2974 222.10      
15 Au 3268 2945 199.91      
16 Au 1633 1472 17.41      
17 Au 1329 1198 23.85      
18 Au 1261 1137 5.42      
19 Au 906 816 0.25      
20 Au 223 201 22.36      
21 Au 113 102 17.61      
22 Au 70 63 8.53      
23 Bg 3269 2947 0.00      
24 Bg 3267 2945 0.00      
25 Bg 1633 1472 0.00      
26 Bg 1411 1272 0.00      
27 Bg 1273 1148 0.00      
28 Bg 1237 1115 0.00      
29 Bg 203 183 0.00      
30 Bg 116 104 0.00      
31 Bu 3345 3015 141.46      
32 Bu 3227 2909 165.66      
33 Bu 3193 2878 172.23      
34 Bu 1670 1505 7.32      
35 Bu 1641 1479 21.56      
36 Bu 1604 1446 4.15      
37 Bu 1490 1343 35.73      
38 Bu 1316 1186 167.28      
39 Bu 1233 1112 296.45      
40 Bu 987 890 69.63      
41 Bu 510 460 7.57      
42 Bu 149 134 8.94      

Unscaled Zero Point Vibrational Energy (zpe) 33340.7 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 30053.3 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 HF/CEP-31G
ABC
0.64490 0.04130 0.03998

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 1.377 1.179 0.000
O2 -1.377 -1.179 0.000
C3 -1.604 -2.595 0.000
C4 1.604 2.595 0.000
C5 0.000 0.763 0.000
C6 0.000 -0.763 0.000
H7 2.678 2.740 0.000
H8 -2.678 -2.740 0.000
H9 -1.174 -3.057 0.890
H10 -1.174 -3.057 -0.890
H11 1.174 3.057 0.890
H12 1.174 3.057 -0.890
H13 -0.512 1.139 0.885
H14 -0.512 1.139 -0.885
H15 0.512 -1.139 0.885
H16 0.512 -1.139 -0.885

Atom - Atom Distances (Å)
  O1 O2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
O13.62534.80971.43421.43832.38052.03225.63935.02455.02452.08852.08852.08672.08672.62802.6280
O23.62531.43424.80972.38051.43835.63932.03222.08852.08855.02455.02452.62802.62802.08672.0867
C34.80971.43426.10223.72162.43556.84141.08341.09181.09186.36106.36103.99043.99042.71752.7175
C41.43424.80976.10222.43553.72161.08346.84146.36106.36101.09181.09182.71752.71753.99043.9904
C51.43832.38053.72162.43551.52573.32894.40934.09444.09442.72682.72681.09011.09012.15982.1598
C62.38051.43832.43553.72161.52574.40933.32892.72682.72684.09444.09442.15982.15981.09011.0901
H72.03225.63936.84141.08343.32894.40937.66287.01707.01701.77691.77693.67773.67774.53024.5302
H85.63932.03221.08346.84144.40933.32897.66281.77691.77697.01707.01704.53024.53023.67773.6777
H95.02452.08851.09186.36104.09442.72687.01701.77691.78086.54986.78764.24854.60472.55383.1105
H105.02452.08851.09186.36104.09442.72687.01701.77691.78086.78766.54984.60474.24853.11052.5538
H112.08855.02456.36101.09182.72684.09441.77697.01706.54986.78761.78082.55383.11054.24854.6047
H122.08855.02456.36101.09182.72684.09441.77697.01706.78766.54981.78083.11052.55384.60474.2485
H132.08672.62803.99042.71751.09012.15983.67774.53024.24854.60472.55383.11051.77092.49853.0625
H142.08672.62803.99042.71751.09012.15983.67774.53024.60474.24853.11052.55381.77093.06252.4985
H152.62802.08672.71753.99042.15981.09014.53023.67772.55383.11054.24854.60472.49853.06251.7709
H162.62802.08672.71753.99042.15981.09014.53023.67773.11052.55384.60474.24853.06252.49851.7709

picture of Ethane, 1,2-dimethoxy- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C4 H7 106.815 O1 C4 H11 110.813
O1 C4 H12 110.813 O1 C5 C6 106.826
O1 C5 H13 110.483 O1 C5 H14 110.483
O2 C3 H8 106.815 O2 C3 H9 110.813
O2 C3 H10 110.813 O2 C6 C5 106.826
O2 C6 H15 110.483 O2 C6 H16 110.483
C3 O2 C6 115.965 C4 O1 C5 115.965
C5 C6 H15 110.205 C5 C6 H16 110.205
C6 C5 H13 110.205 C6 C5 H14 110.205
H7 C4 H11 109.541 H7 C4 H12 109.541
H8 C3 H9 109.541 H8 C3 H10 109.541
H9 C3 H10 109.279 H11 C4 H12 109.279
H13 C5 H14 108.636 H15 C6 H16 108.636
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.439      
2 O -0.439      
3 C -0.189      
4 C -0.189      
5 C 0.005      
6 C 0.005      
7 H 0.177      
8 H 0.177      
9 H 0.119      
10 H 0.119      
11 H 0.119      
12 H 0.119      
13 H 0.104      
14 H 0.104      
15 H 0.104      
16 H 0.104      


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


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.893 2.959 0.000
y 2.959 -26.477 0.000
z 0.000 0.000 -37.756
Traceless
 xyz
x -10.776 2.959 0.000
y 2.959 13.848 0.000
z 0.000 0.000 -3.071
Polar
3z2-r2-6.143
x2-y2-16.416
xy2.959
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.786 1.256 0.000
y 1.256 7.637 0.000
z 0.000 0.000 5.705


<r2> (average value of r2) Å2
<r2> 225.671
(<r2>)1/2 15.022