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All results from a given calculation for NH2COOC2H5 (Urethane)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-62.099163
Energy at 298.15K-62.107790
HF Energy-61.476978
Nuclear repulsion energy133.923473
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 3742 3652 35.01      
2 A 3584 3498 36.68      
3 A 3116 3041 34.22      
4 A 3091 3017 30.86      
5 A 3047 2974 32.83      
6 A 2987 2916 24.63      
7 A 2970 2899 40.17      
8 A 1717 1676 287.02      
9 A 1657 1618 305.75      
10 A 1545 1507 1.76      
11 A 1521 1485 6.77      
12 A 1507 1471 6.59      
13 A 1458 1423 9.47      
14 A 1420 1385 17.43      
15 A 1295 1264 331.48      
16 A 1293 1262 53.38      
17 A 1168 1140 4.56      
18 A 1142 1115 6.01      
19 A 1075 1049 55.72      
20 A 1048 1023 109.26      
21 A 951 928 78.07      
22 A 847 827 0.11      
23 A 788 769 31.38      
24 A 673 657 18.93      
25 A 536 523 3.70      
26 A 512 499 5.44      
27 A 492 480 92.65      
28 A 363 354 0.88      
29 A 265 258 236.05      
30 A 240 234 7.83      
31 A 206 201 3.87      
32 A 91 89 0.85      
33 A 24 23 5.57      

Unscaled Zero Point Vibrational Energy (zpe) 23185.0 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 22628.6 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/CEP-121G
ABC
0.27746 0.06631 0.05467

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 -2.604 -0.256 0.015
H2 -2.662 -0.913 0.896
H3 -3.437 0.467 0.050
H4 -2.698 -0.868 -0.893
C5 -1.258 0.500 0.007
H6 -1.167 1.146 -0.886
H7 -1.122 1.096 0.927
O8 -0.197 -0.560 -0.047
N9 1.479 1.155 0.012
H10 0.786 1.884 -0.074
H11 2.460 1.408 0.032
C12 1.183 -0.217 -0.006
O13 2.057 -1.123 0.018

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 O8 N9 H10 H11 C12 O13
C11.09981.10361.09981.54362.20022.20312.42634.31974.00945.32993.78724.7410
H21.09981.79431.79002.18073.10552.53082.66184.71174.54365.68854.00994.8044
H31.10361.79431.79402.17942.54702.55363.39974.96384.45545.97104.67065.7196
H41.09981.79001.79402.18122.53003.10742.65824.72884.51505.71334.03444.8487
C51.54362.18072.17942.18121.10561.10471.50072.81422.46953.82702.54443.6914
H62.20023.10552.54702.53001.10561.81412.13422.79442.24013.75032.85594.0451
H72.20312.53082.55363.10741.10471.81412.13262.75852.29413.70542.81283.9829
O82.42632.66183.39972.65821.50072.13422.13262.39892.63483.30761.42312.3248
N94.31974.71174.96384.72882.81422.79442.75852.39891.01031.01301.40362.3503
H104.00944.54364.45544.51502.46952.24012.29412.63481.01031.74372.13993.2668
H115.32995.68855.97105.71333.82703.75033.70543.30761.01301.74372.06712.5635
C123.78724.00994.67064.03442.54442.85592.81281.42311.40362.13992.06711.2593
O134.74104.80445.71964.84873.69144.04513.98292.32482.35033.26682.56351.2593

picture of Urethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 111.228 C1 C5 H7 111.514
C1 C5 O8 105.681 H2 C1 H3 109.044
H2 C1 H4 108.937 H2 C1 C5 110.038
H3 C1 H4 109.020 H3 C1 C5 109.708
H4 C1 C5 110.067 C5 O8 C12 120.951
H6 C5 H7 110.325 H6 C5 O8 109.007
H7 C5 O8 108.931 O8 C12 N9 116.133
O8 C12 O13 120.028 N9 C12 O13 123.838
H10 N9 H11 119.043 H10 N9 C12 124.061
H11 N9 C12 116.677
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability