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 H2OCH3OCH3 (water dimethylether dimer)

using model chemistry: HF_cp/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF_cp/3-21G
 hartrees
Energy at 0K-228.805063
Energy at 298.15K-228.796625
Nuclear repulsion energy 
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/3-21G
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 3906 3537 63.31      
2 A 3735 3382 266.88      
3 A 3334 3019 3.59      
4 A 3297 2986 28.97      
5 A 3237 2932 91.40      
6 A 3233 2927 27.83      
7 A 3190 2889 47.61      
8 A 3182 2881 29.92      
9 A 1842 1668 93.36      
10 A 1698 1538 1.05      
11 A 1691 1531 9.89      
12 A 1683 1524 13.51      
13 A 1673 1515 3.72      
14 A 1644 1489 2.69      
15 A 1604 1453 6.63      
16 A 1370 1241 1.17      
17 A 1290 1168 25.65      
18 A 1287 1165 76.03      
19 A 1258 1140 0.04      
20 A 1183 1071 65.86      
21 A 965 874 30.63      
22 A 822 745 341.33      
23 A 429 389 10.99      
24 A 384 347 124.06      
25 A 286 259 41.62      
26 A 227 206 4.71      
27 A 219 198 86.47      
28 A 204 184 28.66      
29 A 130 118 18.04      
30 A 67 61 6.40      

Unscaled Zero Point Vibrational Energy (zpe) 24534.3 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 22218.2 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 HF/3-21G
ABC
0.38200 0.11068 0.08950

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.361 -0.565 0.139
O2 2.311 -0.357 0.112
O3 -0.398 -0.177 -0.078
C4 -0.325 1.261 0.002
C5 -1.720 -0.728 0.024
H6 2.631 -0.557 -0.777
H7 -0.768 1.621 0.924
H8 0.726 1.491 -0.015
H9 -0.831 1.720 -0.840
H10 -1.620 -1.800 -0.040
H11 -2.180 -0.463 0.969
H12 -2.350 -0.376 -0.786

Atom - Atom Distances (Å)
  H1 O2 O3 C4 C5 H6 H7 H8 H9 H10 H11 H12
H10.97311.81412.48893.08671.56593.15042.15733.31433.23163.63793.8288
O20.97312.72173.09494.04850.96623.74832.43793.88524.19044.57294.7466
O31.81412.72171.44201.43533.13162.09112.01292.09002.03232.08622.0856
C42.48893.09491.44202.42923.55631.08441.07661.08433.32432.71092.7200
C53.08674.04851.43532.42924.42662.68953.30302.74391.07901.08451.0846
H61.56590.96623.13163.55634.42664.38022.89864.14404.48995.11844.9839
H73.15043.74832.09111.08442.68954.38021.76951.76793.65522.51793.0679
H82.15732.43792.01291.07663.30302.89861.76951.77744.04263.63803.6802
H93.31433.88522.09001.08432.74394.14401.76791.77743.69583.14022.5889
H103.23164.19042.03233.32431.07904.48993.65524.04263.69581.76611.7662
H113.63794.57292.08622.71091.08455.11842.51793.63803.14021.76611.7655
H123.82884.74662.08562.72001.08464.98393.06793.68022.58891.76621.7655

picture of water dimethylether dimer state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.416      
2 O -0.791      
3 O -0.668      
4 C -0.280      
5 C -0.248      
6 H 0.348      
7 H 0.188      
8 H 0.249      
9 H 0.185      
10 H 0.221      
11 H 0.191      
12 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.415 0.311 -1.479 3.734
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 131.820
(<r2>)1/2 11.481