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: MP2/CEP-121G*

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 MP2/CEP-121G*
 hartrees
Energy at 0K-45.452836
Energy at 298.15K-45.458296
HF Energy-44.722248
Nuclear repulsion energy84.724153
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 MP2/CEP-121G*
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' 3211 3059 19.28      
2 A' 3041 2897 50.14      
3 A' 3035 2892 35.05      
4 A' 2153 2051 10.62      
5 A' 1551 1478 3.15      
6 A' 1537 1464 7.98      
7 A' 1506 1435 0.52      
8 A' 1427 1360 40.95      
9 A' 1236 1178 41.22      
10 A' 1160 1105 133.02      
11 A' 993 947 37.96      
12 A' 946 902 7.51      
13 A' 524 499 0.58      
14 A' 375 358 1.41      
15 A' 171 163 1.78      
16 A" 3119 2972 47.35      
17 A" 3093 2947 35.21      
18 A" 1525 1453 8.01      
19 A" 1261 1202 2.62      
20 A" 1187 1131 4.32      
21 A" 1046 997 3.45      
22 A" 333 317 0.75      
23 A" 225 214 4.85      
24 A" 80 76 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 17366.7 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 16547.0 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 MP2/CEP-121G*
ABC
0.95790 0.08083 0.07673

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.154 -0.318 0.000
O2 -0.748 -0.611 0.000
C3 0.000 0.600 0.000
C4 1.443 0.251 0.000
N5 2.602 0.007 0.000
H6 -2.661 -1.283 0.000
H7 -2.437 0.250 0.897
H8 -2.437 0.250 -0.897
H9 -0.213 1.206 -0.894
H10 -0.213 1.206 0.894

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.43562.34123.64114.76731.09031.09911.09912.62442.6244
O21.43561.42352.35453.40742.02712.09702.09702.09452.0945
C32.34121.42351.48412.66913.25972.62042.62041.10091.1009
C43.64112.35451.48411.18534.38083.98193.98192.11002.1100
N54.76733.40742.66911.18535.41925.12445.12443.18813.1881
H61.09032.02713.25974.38085.41921.79041.79043.60363.6036
H71.09912.09702.62043.98195.12441.79041.79503.01142.4205
H81.09912.09702.62043.98195.12441.79041.79502.42053.0114
H92.62442.09451.10092.11003.18813.60363.01142.42051.7880
H102.62442.09451.10092.11003.18813.60362.42053.01141.7880

picture of Methoxyacetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 109.941 O2 C1 H6 105.937
O2 C1 H7 110.952 O2 C1 H8 110.952
O2 C3 C4 108.130 O2 C3 H9 111.499
O2 C3 H10 111.499 C3 C4 N5 178.282
C4 C3 H9 108.516 C4 C3 H10 108.516
H6 C1 H7 109.724 H6 C1 H8 109.724
H7 C1 H8 109.491 H9 C3 H10 108.593
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-45.456171
Energy at 298.15K-45.461802
HF Energy-44.723912
Nuclear repulsion energy86.376448
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 MP2/CEP-121G*
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 3210 3059 20.50      
2 A 3178 3028 6.37      
3 A 3135 2987 38.11      
4 A 3061 2916 34.23      
5 A 3044 2900 40.09      
6 A 2136 2035 10.79      
7 A 1545 1472 11.23      
8 A 1530 1458 7.46      
9 A 1523 1451 1.75      
10 A 1507 1436 0.46      
11 A 1403 1337 19.96      
12 A 1317 1255 4.42      
13 A 1226 1168 38.60      
14 A 1194 1138 8.94      
15 A 1162 1107 107.93      
16 A 1045 996 7.97      
17 A 944 900 37.77      
18 A 895 853 21.24      
19 A 587 559 1.85      
20 A 398 379 3.86      
21 A 331 315 1.26      
22 A 259 247 9.45      
23 A 179 171 4.59      
24 A 118 113 8.51      

Unscaled Zero Point Vibrational Energy (zpe) 17463.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 16639.3 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 MP2/CEP-121G*
ABC
0.38283 0.11319 0.09458

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.529 -0.809 0.141
O2 1.105 0.436 -0.442
C3 -0.041 0.958 0.213
C4 -1.238 0.078 0.038
N5 -2.169 -0.644 -0.101
H6 2.464 -1.068 -0.356
H7 0.787 -1.598 -0.030
H8 1.701 -0.691 1.221
H9 -0.248 1.932 -0.236
H10 0.132 1.085 1.292

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.43922.36452.90743.70931.09041.09691.09923.28832.6202
O21.43921.41922.41853.46432.02892.10042.09552.02712.0919
C32.36451.41921.49602.68173.27122.69752.60151.09261.1005
C42.90742.41851.49601.18593.89532.62923.26002.11952.1135
N53.70933.46432.68171.18594.65933.10654.08953.21563.1981
H61.09042.02893.27123.89534.65931.78961.79164.04563.5766
H71.09692.10042.69752.62923.10651.78961.79503.68433.0626
H81.09922.09552.60153.26004.08951.79161.79503.57802.3714
H93.28832.02711.09262.11953.21564.04563.68433.57801.7883
H102.62022.09191.10052.11353.19813.57663.06262.37141.7883

picture of Methoxyacetonitrile state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 111.622 O2 C1 H6 105.830
O2 C1 H7 111.111 O2 C1 H8 110.566
O2 C3 C4 112.093 O2 C3 H9 106.894
O2 C3 H10 111.621 C3 C4 N5 178.539
C4 C3 H9 108.920 C4 C3 H10 108.001
H6 C1 H7 109.804 H6 C1 H8 109.819
H7 C1 H8 109.645 H9 C3 H10 109.257
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability