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: MP2/3-21G

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 MP2/3-21G
 hartrees
Energy at 0K-244.927505
Energy at 298.15K-244.933131
HF Energy-244.415479
Nuclear repulsion energy153.882767
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 MP2/3-21G
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' 3191 3046 16.07      
2 A' 3049 2910 34.27      
3 A' 3044 2905 15.20      
4 A' 2157 2059 14.89      
5 A' 1618 1544 2.39      
6 A' 1605 1532 6.63      
7 A' 1537 1467 2.43      
8 A' 1447 1381 28.62      
9 A' 1212 1156 10.80      
10 A' 1092 1042 92.74      
11 A' 941 899 4.54      
12 A' 909 868 21.10      
13 A' 558 533 0.70      
14 A' 377 359 1.86      
15 A' 181 173 0.75      
16 A" 3102 2961 48.56      
17 A" 3075 2935 30.67      
18 A" 1589 1517 7.58      
19 A" 1295 1236 0.52      
20 A" 1190 1136 2.43      
21 A" 1086 1036 2.18      
22 A" 427 407 0.08      
23 A" 235 224 5.25      
24 A" 92 88 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 17503.7 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 16707.3 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 MP2/3-21G
ABC
0.89794 0.08018 0.07572

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.169 -0.413 0.000
O2 -0.714 -0.645 0.000
C3 0.000 0.639 0.000
C4 1.439 0.325 0.000
N5 2.598 0.072 0.000
H6 -2.618 -1.407 0.000
H7 -2.490 0.139 0.894
H8 -2.490 0.139 -0.894
H9 -0.248 1.236 -0.890
H10 -0.248 1.236 0.890

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.47402.41103.68284.79191.09031.09821.09822.68422.6842
O21.47401.46892.36083.38822.05122.13732.13732.13242.1324
C32.41101.46891.47272.65933.32262.69242.69241.10001.1000
C43.68282.36081.47271.18664.41104.03344.03342.11352.1135
N54.79193.38822.65931.18665.42155.16635.16633.20113.2011
H61.09032.05123.32264.41105.42151.79001.79003.66013.6601
H71.09822.13732.69244.03345.16631.79001.78713.06802.4964
H81.09822.13732.69244.03345.16631.79001.78712.49643.0680
H92.68422.13241.10002.11353.20113.66013.06802.49641.7799
H102.68422.13241.10002.11353.20113.66012.49643.06801.7799

picture of Methoxyacetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 110.026 O2 C1 H6 105.261
O2 C1 H7 111.555 O2 C1 H8 111.555
O2 C3 C4 106.750 O2 C3 H9 111.412
O2 C3 H10 111.412 C3 C4 N5 179.985
C4 C3 H9 109.625 C4 C3 H10 109.625
H6 C1 H7 109.755 H6 C1 H8 109.755
H7 C1 H8 108.903 H9 C3 H10 108.005
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-244.931073
Energy at 298.15K-244.936805
HF Energy-244.418769
Nuclear repulsion energy156.796154
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 MP2/3-21G
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 3194 3049 16.89      
2 A 3158 3014 4.99      
3 A 3118 2976 37.94      
4 A 3059 2919 25.74      
5 A 3057 2918 24.91      
6 A 2139 2041 15.59      
7 A 1614 1540 7.86      
8 A 1590 1518 8.43      
9 A 1576 1505 3.20      
10 A 1538 1468 1.33      
11 A 1422 1357 8.80      
12 A 1336 1276 2.36      
13 A 1216 1161 3.77      
14 A 1192 1137 2.15      
15 A 1107 1056 70.84      
16 A 1050 1002 19.21      
17 A 892 852 26.37      
18 A 872 832 13.31      
19 A 599 572 1.86      
20 A 415 396 1.05      
21 A 385 367 3.50      
22 A 263 251 9.92      
23 A 189 181 4.53      
24 A 124 118 9.44      

Unscaled Zero Point Vibrational Energy (zpe) 17551.2 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 16752.6 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 MP2/3-21G
ABC
0.37078 0.11109 0.09278

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.567 -0.809 0.148
O2 1.110 0.459 -0.458
C3 -0.083 0.964 0.226
C4 -1.254 0.072 0.046
N5 -2.166 -0.672 -0.113
H6 2.468 -1.083 -0.402
H7 0.813 -1.598 0.043
H8 1.805 -0.678 1.212
H9 -0.287 1.939 -0.224
H10 0.097 1.096 1.303

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.47782.42352.95723.74451.09021.09631.09823.33592.6691
O21.47781.46482.44833.48302.05512.13832.13632.04862.1288
C32.42351.46481.48362.67073.33022.72102.68941.09301.0998
C42.95722.44831.48361.18753.92262.65773.35812.12062.1104
N53.74453.48302.67071.18754.66093.12374.18583.21923.2020
H61.09022.05513.33023.92264.66091.78951.79104.09293.6432
H71.09632.13832.72102.65773.12371.78951.78753.71443.0592
H81.09822.13632.68943.35814.18581.79101.78753.64522.4641
H93.33592.04861.09302.12063.21924.09293.71443.64521.7861
H102.66912.12881.09982.11043.20203.64323.05922.46411.7861

picture of Methoxyacetonitrile state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 110.887 O2 C1 H6 105.316
O2 C1 H7 111.483 O2 C1 H8 111.203
O2 C3 C4 112.271 O2 C3 H9 105.518
O2 C3 H10 111.415 C3 C4 N5 177.962
C4 C3 H9 109.847 C4 C3 H10 108.639
H6 C1 H7 109.850 H6 C1 H8 109.855
H7 C1 H8 109.079 H9 C3 H10 109.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability