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 CH3OCH2CN (Methoxyacetonitrile)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS 1A'
1 2 yes C1 1A

Conformer 1 (CS)

Jump to S1C2
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-246.716038
Energy at 298.15K-246.721653
HF Energy-245.816155
Nuclear repulsion energy157.334516
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3192 3024 14.55      
2 A' 3046 2886 38.84      
3 A' 3039 2879 18.31      
4 A' 2365 2240 0.95      
5 A' 1550 1469 3.57      
6 A' 1531 1451 6.73      
7 A' 1511 1431 0.21      
8 A' 1444 1368 43.50      
9 A' 1261 1195 64.28      
10 A' 1197 1134 104.55      
11 A' 1029 975 28.76      
12 A' 962 911 7.66      
13 A' 549 520 1.75      
14 A' 388 368 2.46      
15 A' 183 174 2.74      
16 A" 3104 2940 37.40      
17 A" 3076 2914 23.97      
18 A" 1522 1442 7.18      
19 A" 1288 1221 3.48      
20 A" 1207 1143 3.18      
21 A" 1056 1001 1.70      
22 A" 377 357 2.71      
23 A" 234 222 3.89      
24 A" 88 84 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 17599.0 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 16673.3 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 QCISD/6-31G(2df,p)
ABC
0.98648 0.08263 0.07851

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.126 -0.330 0.000
O2 -0.739 -0.599 0.000
C3 0.000 0.589 0.000
C4 1.433 0.250 0.000
N5 2.569 0.021 0.000
H6 -2.635 -1.292 0.000
H7 -2.424 0.236 0.892
H8 -2.424 0.236 -0.892
H9 -0.213 1.202 -0.887
H10 -0.213 1.202 0.887

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.41252.31613.60584.70781.08911.09751.09752.60642.6064
O21.41251.39962.33243.36572.01862.08112.08112.07572.0757
C32.31611.39961.47262.63103.23812.60692.60691.09901.0990
C43.60582.33241.47261.15874.35073.95883.95882.09822.0982
N54.70783.36572.63101.15875.36705.07645.07643.14983.1498
H61.08912.01863.23814.35075.36701.78241.78243.58853.5885
H71.09752.08112.60693.95885.07641.78241.78362.99762.4128
H81.09752.08112.60693.95885.07641.78241.78362.41282.9976
H92.60642.07571.09902.09823.14983.58852.99762.41281.7739
H102.60642.07571.09902.09823.14983.58852.41282.99761.7739

picture of Methoxyacetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 110.899 O2 C1 H6 106.883
O2 C1 H7 111.403 O2 C1 H8 111.403
O2 C3 C4 108.568 O2 C3 H9 111.787
O2 C3 H10 111.787 C3 C4 N5 178.093
C4 C3 H9 108.488 C4 C3 H10 108.488
H6 C1 H7 109.207 H6 C1 H8 109.207
H7 C1 H8 108.688 H9 C3 H10 107.624
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-246.718667
Energy at 298.15K-246.724404
HF Energy-245.817817
Nuclear repulsion energy160.208684
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3194 3026 14.94      
2 A 3160 2994 4.53      
3 A 3120 2956 28.86      
4 A 3062 2901 23.06      
5 A 3052 2892 28.17      
6 A 2349 2225 1.48      
7 A 1541 1460 8.47      
8 A 1525 1444 5.73      
9 A 1519 1439 3.22      
10 A 1505 1426 0.84      
11 A 1421 1346 18.93      
12 A 1342 1271 7.68      
13 A 1254 1188 62.12      
14 A 1210 1146 13.10      
15 A 1193 1130 73.52      
16 A 1055 999 6.56      
17 A 978 926 27.14      
18 A 910 862 19.56      
19 A 602 570 1.52      
20 A 405 383 2.45      
21 A 371 352 1.74      
22 A 267 253 10.69      
23 A 183 173 4.19      
24 A 121 114 8.34      

Unscaled Zero Point Vibrational Energy (zpe) 17667.9 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 16738.6 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 QCISD/6-31G(2df,p)
ABC
0.40207 0.11331 0.09570

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.551 -0.774 0.137
O2 1.081 0.431 -0.441
C3 -0.049 0.928 0.212
C4 -1.238 0.057 0.034
N5 -2.163 -0.631 -0.096
H6 2.446 -1.056 -0.416
H7 0.808 -1.575 0.054
H8 1.807 -0.632 1.194
H9 -0.269 1.906 -0.220
H10 0.119 1.054 1.289

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.41662.33722.91223.72381.08901.09581.09723.25902.5923
O21.41661.39612.39693.43062.01872.08442.08072.01142.0749
C32.33721.39611.48492.64443.24882.65032.61581.09101.0982
C42.91222.39691.48491.15963.87492.61723.33032.10302.1009
N53.72383.43062.64441.15964.63943.12064.17383.16793.1573
H61.08902.01873.24883.87494.63941.78181.78354.02263.5739
H71.09582.08442.65032.61723.12061.78181.78513.65382.9853
H81.09722.08072.61583.33034.17381.78351.78513.57032.3871
H93.25902.01141.09102.10303.16794.02263.65383.57031.7757
H102.59232.07491.09822.10093.15733.57392.98532.38711.7757

picture of Methoxyacetonitrile state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 112.390 O2 C1 H6 106.619
O2 C1 H7 111.485 O2 C1 H8 111.093
O2 C3 C4 112.568 O2 C3 H9 107.309
O2 C3 H10 112.031 C3 C4 N5 179.428
C4 C3 H9 108.488 C4 C3 H10 107.909
H6 C1 H7 109.283 H6 C1 H8 109.332
H7 C1 H8 108.976 H9 C3 H10 108.411
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability