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/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 QCISD/3-21G*
 hartrees
Energy at 0K-244.954099
Energy at 298.15K-244.959709
HF Energy-244.417932
Nuclear repulsion energy154.018502
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/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' 3125 3004 17.79      
2 A' 2995 2878 30.50      
3 A' 2990 2874 19.76      
4 A' 2301 2211 4.62      
5 A' 1595 1533 1.62      
6 A' 1583 1521 7.95      
7 A' 1516 1457 2.11      
8 A' 1433 1377 29.97      
9 A' 1202 1156 12.30      
10 A' 1094 1051 88.33      
11 A' 937 901 5.67      
12 A' 911 876 22.68      
13 A' 558 537 0.72      
14 A' 378 363 1.88      
15 A' 182 175 0.83      
16 A" 3036 2918 49.39      
17 A" 3018 2900 31.28      
18 A" 1564 1503 7.36      
19 A" 1283 1233 0.55      
20 A" 1177 1132 2.81      
21 A" 1073 1031 2.41      
22 A" 430 413 0.20      
23 A" 232 223 5.44      
24 A" 92 89 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 17352.1 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 16677.1 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/3-21G*
ABC
0.89892 0.08026 0.07582

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.169 -0.419 0.000
O2 -0.712 -0.643 0.000
C3 0.000 0.639 0.000
C4 1.445 0.326 0.000
N5 2.591 0.077 0.000
H6 -2.615 -1.418 0.000
H7 -2.493 0.134 0.897
H8 -2.493 0.134 -0.897
H9 -0.246 1.239 -0.893
H10 -0.246 1.239 0.893

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.47342.41333.68984.78511.09451.10251.10252.69182.6918
O21.47341.46672.36483.38052.05482.13932.13932.13462.1346
C32.41331.46671.47872.65103.32772.69712.69711.10361.1036
C43.68982.36481.47871.17234.41894.04324.04322.11912.1191
N54.78513.38052.65101.17235.41625.16225.16223.19273.1927
H61.09452.05483.32774.41895.41621.79691.79693.67083.6708
H71.10252.13932.69714.04325.16221.79691.79483.07872.5043
H81.10252.13932.69714.04325.16221.79691.79482.50433.0787
H92.69182.13461.10362.11913.19273.67083.07872.50431.7866
H102.69182.13461.10362.11913.19273.67082.50433.07871.7866

picture of Methoxyacetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 110.336 O2 C1 H6 105.342
O2 C1 H7 111.494 O2 C1 H8 111.494
O2 C3 C4 106.814 O2 C3 H9 111.522
O2 C3 H10 111.522 C3 C4 N5 179.984
C4 C3 H9 109.437 C4 C3 H10 109.437
H6 C1 H7 109.743 H6 C1 H8 109.743
H7 C1 H8 108.967 H9 C3 H10 108.083
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-244.957397
Energy at 298.15K-244.963111
HF Energy-244.421297
Nuclear repulsion energy156.862336
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/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 3128 3006 18.73      
2 A 3100 2979 5.91      
3 A 3054 2935 38.29      
4 A 3007 2890 27.56      
5 A 3000 2883 25.05      
6 A 2284 2195 6.12      
7 A 1589 1527 7.92      
8 A 1565 1505 8.49      
9 A 1555 1494 3.00      
10 A 1517 1458 1.36      
11 A 1409 1354 9.60      
12 A 1326 1274 2.43      
13 A 1207 1160 4.72      
14 A 1179 1133 2.45      
15 A 1105 1062 76.12      
16 A 1044 1003 10.86      
17 A 888 853 29.77      
18 A 869 835 14.29      
19 A 598 575 1.76      
20 A 419 403 0.62      
21 A 387 372 3.78      
22 A 262 252 10.85      
23 A 189 181 4.13      
24 A 123 119 9.86      

Unscaled Zero Point Vibrational Energy (zpe) 17400.6 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 16723.8 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/3-21G*
ABC
0.37339 0.11062 0.09262

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.580 -0.801 0.147
O2 1.105 0.460 -0.457
C3 -0.087 0.960 0.226
C4 -1.262 0.061 0.044
N5 -2.165 -0.671 -0.111
H6 2.484 -1.068 -0.409
H7 0.831 -1.601 0.047
H8 1.823 -0.665 1.213
H9 -0.299 1.939 -0.223
H10 0.090 1.090 1.307

Atom - Atom Distances (Å)
  C1 O2 C3 C4 N5 H6 H7 H8 H9 H10
C11.47712.42672.97143.75551.09451.10051.10243.34262.6730
O21.47711.46212.45193.47712.05912.14002.13812.05212.1307
C32.42671.46211.49012.66293.33602.72692.69531.09671.1034
C42.97142.45191.49011.17313.93862.67263.37782.12652.1169
N53.75553.47712.66291.17314.67503.14034.20183.21013.1935
H61.09452.05913.33603.93864.67501.79621.79794.10113.6520
H71.10052.14002.72692.67263.14031.79621.79493.72543.0629
H81.10242.13812.69533.37784.20181.79791.79493.65252.4683
H93.34262.05211.09672.12653.21014.10113.72543.65251.7917
H102.67302.13071.10342.11693.19353.65203.06292.46831.7917

picture of Methoxyacetonitrile state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C3 111.297 O2 C1 H6 105.426
O2 C1 H7 111.407 O2 C1 H8 111.132
O2 C3 C4 112.302 O2 C3 H9 105.746
O2 C3 H10 111.537 C3 C4 N5 178.268
C4 C3 H9 109.641 C4 C3 H10 108.498
H6 C1 H7 109.836 H6 C1 H8 109.845
H7 C1 H8 109.139 H9 C3 H10 109.049
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability