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: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-231.476681
Energy at 298.15K-231.484707
HF Energy-231.476681
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy134.315400
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 B3LYP/6-31G(2df,p)
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 3873 3738 65.99      
2 A 3721 3591 217.67      
3 A 3140 3030 7.56      
4 A 3121 3012 23.32      
5 A 3035 2928 20.03      
6 A 3029 2923 90.08      
7 A 2988 2883 60.69      
8 A 2976 2872 46.11      
9 A 1688 1629 60.34      
10 A 1520 1467 0.92      
11 A 1499 1446 11.85      
12 A 1495 1443 8.17      
13 A 1489 1437 3.96      
14 A 1482 1430 1.42      
15 A 1462 1410 2.91      
16 A 1278 1233 3.95      
17 A 1205 1163 44.23      
18 A 1200 1158 55.52      
19 A 1169 1128 0.02      
20 A 1124 1084 47.55      
21 A 944 911 44.77      
22 A 625 603 165.92      
23 A 418 403 3.97      
24 A 280 270 60.64      
25 A 252 243 23.18      
26 A 220 212 2.60      
27 A 184 178 77.39      
28 A 165 159 0.43      
29 A 95 92 10.00      
30 A 46 44 2.27      

Unscaled Zero Point Vibrational Energy (zpe) 22859.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 22059.3 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 B3LYP/6-31G(2df,p)
ABC
0.37570 0.10583 0.08643

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.465 -0.538 0.113
O2 2.405 -0.303 0.130
O3 -0.417 -0.157 -0.169
C4 -0.462 1.244 0.020
C5 -1.657 -0.790 0.053
H6 2.684 -0.426 -0.782
H7 -0.831 1.502 1.024
H8 0.562 1.605 -0.089
H9 -1.113 1.725 -0.726
H10 -1.515 -1.860 -0.112
H11 -2.014 -0.630 1.082
H12 -2.426 -0.419 -0.641

Atom - Atom Distances (Å)
  H1 O2 O3 C4 C5 H6 H7 H8 H9 H10 H11 H12
H10.96881.94072.62663.13331.51593.20372.33423.53143.26783.61293.9656
O20.96882.84153.26004.09220.96173.81192.66224.15004.22454.53224.8939
O31.94072.84151.41481.41003.17232.08462.01742.08322.02672.08292.0808
C42.62663.26001.41482.35933.65111.10031.09121.10023.28042.65512.6574
C53.13334.09221.41002.35934.43582.62193.26802.68901.09231.10061.1005
H61.51590.96173.17233.65114.43584.39703.01814.36424.48695.05835.1121
H73.20373.81192.08461.10032.62194.39701.78591.78603.61362.43853.0010
H82.33422.66222.01741.09123.26803.01811.78591.79554.03963.60583.6513
H93.53144.15002.08321.10022.68904.36421.78601.79553.65983.10332.5166
H103.26784.22452.02673.28041.09234.48693.61364.03963.65981.78581.7851
H113.61294.53222.08292.65511.10065.05832.43853.60583.10331.78581.7847
H123.96564.89392.08082.65741.10055.11213.00103.65132.51661.78511.7847

picture of water dimethylether dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H6 103.483 H1 O3 C4 101.887
H1 O3 C5 137.943 O2 H1 O3 153.636
O3 C4 H7 111.348 O3 C4 H8 106.517
O3 C4 H9 111.237 O3 C5 H10 107.498
O3 C5 H11 111.537 O3 C5 H12 111.367
C4 O3 C5 113.280 H7 C4 H8 109.166
H7 C4 H9 108.511 H8 C4 H9 110.037
H10 C5 H11 109.047 H10 C5 H12 108.987
H11 C5 H12 108.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability