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/6-31G*

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/6-31G*
 hartrees
Energy at 0K-306.980196
Energy at 298.15K-306.992164
HF Energy-306.980196
Nuclear repulsion energy254.759351
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/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 Ag 3305 2969 0.00      
2 Ag 3190 2866 0.00      
3 Ag 3174 2852 0.00      
4 Ag 1682 1511 0.00      
5 Ag 1659 1491 0.00      
6 Ag 1645 1478 0.00      
7 Ag 1605 1442 0.00      
8 Ag 1378 1238 0.00      
9 Ag 1297 1166 0.00      
10 Ag 1174 1055 0.00      
11 Ag 1123 1009 0.00      
12 Ag 426 383 0.00      
13 Ag 356 320 0.00      
14 Au 3236 2907 199.01      
15 Au 3225 2898 105.58      
16 Au 1645 1478 7.40      
17 Au 1367 1229 19.43      
18 Au 1296 1164 7.36      
19 Au 903 811 1.73      
20 Au 254 228 14.27      
21 Au 123 111 7.32      
22 Au 75 67 5.42      
23 Bg 3225 2898 0.00      
24 Bg 3207 2882 0.00      
25 Bg 1645 1478 0.00      
26 Bg 1428 1283 0.00      
27 Bg 1312 1178 0.00      
28 Bg 1269 1140 0.00      
29 Bg 232 208 0.00      
30 Bg 130 117 0.00      
31 Bu 3305 2969 101.96      
32 Bu 3190 2866 145.66      
33 Bu 3174 2852 75.94      
34 Bu 1689 1518 3.01      
35 Bu 1658 1489 17.75      
36 Bu 1633 1467 13.76      
37 Bu 1508 1355 60.10      
38 Bu 1362 1224 264.36      
39 Bu 1288 1158 260.12      
40 Bu 1068 960 74.40      
41 Bu 544 488 5.61      
42 Bu 159 143 4.63      

Unscaled Zero Point Vibrational Energy (zpe) 33580.0 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 30171.7 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 HF/6-31G*
ABC
0.65811 0.04339 0.04198

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.428 1.726 0.000
O2 -0.428 -1.726 0.000
C3 0.223 -2.956 0.000
C4 -0.223 2.956 0.000
C5 -0.428 0.625 0.000
C6 0.428 -0.625 0.000
H7 0.536 3.727 0.000
H8 -0.536 -3.727 0.000
H9 0.847 -3.076 0.883
H10 0.847 -3.076 -0.883
H11 -0.847 3.076 0.883
H12 -0.847 3.076 -0.883
H13 -1.069 0.629 0.879
H14 -1.069 0.629 -0.879
H15 1.069 -0.629 0.879
H16 1.069 -0.629 -0.879

Atom - Atom Distances (Å)
  O1 O2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
O13.55554.68631.39211.39442.35012.00455.53714.89974.89972.05642.05642.05322.05322.59412.5941
O23.55551.39214.68632.35011.39445.53712.00452.05642.05644.89974.89972.59412.59412.05322.0532
C34.68631.39215.92933.63942.34076.69071.08131.08831.08836.18946.18943.91143.91142.62752.6275
C41.39214.68635.92932.34073.63941.08136.69076.18946.18941.08831.08832.62752.62753.91143.9114
C51.39442.35013.63942.34071.51413.24874.35294.01214.01212.63892.63891.08821.08822.14162.1416
C62.35011.39442.34073.63941.51414.35293.24872.63892.63894.01214.01212.14162.14161.08821.0882
H72.00455.53716.69071.08133.24874.35297.53076.86696.86691.76551.76553.59783.59784.47624.4762
H85.53712.00451.08136.69074.35293.24877.53071.76551.76556.86696.86694.47624.47623.59783.5978
H94.89972.05641.08836.18944.01212.63896.86691.76551.76636.38046.62044.17144.52832.45633.0230
H104.89972.05641.08836.18944.01212.63896.86691.76551.76636.62046.38044.52834.17143.02302.4563
H112.05644.89976.18941.08832.63894.01211.76556.86696.38046.62041.76632.45633.02304.17144.5283
H122.05644.89976.18941.08832.63894.01211.76556.86696.62046.38041.76633.02302.45634.52834.1714
H132.05322.59413.91142.62751.08822.14163.59784.47624.17144.52832.45633.02301.75802.48153.0412
H142.05322.59413.91142.62751.08822.14163.59784.47624.52834.17143.02302.45631.75803.04122.4815
H152.59412.05322.62753.91142.14161.08824.47623.59782.45633.02304.17144.52832.48153.04121.7580
H162.59412.05322.62753.91142.14161.08824.47623.59783.02302.45634.52834.17143.04122.48151.7580

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 107.604 O1 C4 H11 111.418
O1 C4 H12 111.418 O1 C5 C6 107.728
O1 C5 H13 110.992 O1 C5 H14 110.992
O2 C3 H8 107.604 O2 C3 H9 111.418
O2 C3 H10 111.418 O2 C6 C5 107.728
O2 C6 H15 110.992 O2 C6 H16 110.992
C3 O2 C6 114.283 C4 O1 C5 114.283
C5 C6 H15 109.683 C5 C6 H16 109.683
C6 C5 H13 109.683 C6 C5 H14 109.683
H7 C4 H11 108.926 H7 C4 H12 108.926
H8 C3 H9 108.926 H8 C3 H10 108.926
H9 C3 H10 108.491 H11 C4 H12 108.491
H13 C5 H14 107.761 H15 C6 H16 107.761
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.620      
2 O -0.620      
3 C -0.159      
4 C -0.159      
5 C 0.013      
6 C 0.013      
7 H 0.177      
8 H 0.177      
9 H 0.143      
10 H 0.143      
11 H 0.143      
12 H 0.143      
13 H 0.152      
14 H 0.152      
15 H 0.152      
16 H 0.152      


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 0.000 0.000 0.000 0.000
AIM        
ESP -0.003 -0.009 0.000 0.010


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.463 -4.552 0.000
y -4.552 -31.045 0.000
z 0.000 0.000 -38.206
Traceless
 xyz
x -4.837 -4.552 0.000
y -4.552 7.790 0.000
z 0.000 0.000 -2.953
Polar
3z2-r2-5.906
x2-y2-8.418
xy-4.552
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.335 0.004 0.000
y 0.004 8.555 0.000
z 0.000 0.000 6.371


<r2> (average value of r2) Å2
<r2> 266.980
(<r2>)1/2 16.340