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 NH2COOC2H5 (Urethane)

using model chemistry: B1B95/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/6-311G*
 hartrees
Energy at 0K-323.695057
Energy at 298.15K-323.704241
Nuclear repulsion energy247.495895
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 B1B95/6-311G*
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 3746 3591 32.57      
2 A 3630 3479 21.20      
3 A 3154 3024 26.27      
4 A 3145 3015 24.76      
5 A 3072 2945 28.04      
6 A 3068 2941 16.82      
7 A 3012 2888 47.56      
8 A 1878 1801 546.31      
9 A 1671 1602 141.53      
10 A 1538 1475 1.27      
11 A 1514 1452 4.22      
12 A 1496 1434 8.22      
13 A 1443 1383 9.37      
14 A 1410 1352 40.31      
15 A 1354 1298 371.58      
16 A 1327 1272 1.01      
17 A 1186 1137 5.52      
18 A 1169 1121 35.06      
19 A 1126 1079 102.43      
20 A 1105 1059 41.02      
21 A 1003 962 16.76      
22 A 872 835 14.11      
23 A 845 810 0.73      
24 A 782 750 33.06      
25 A 578 554 20.27      
26 A 556 533 4.10      
27 A 543 521 72.54      
28 A 393 376 41.09      
29 A 367 352 126.10      
30 A 265 254 0.41      
31 A 223 213 3.04      
32 A 120 115 0.32      
33 A 96 92 1.93      

Unscaled Zero Point Vibrational Energy (zpe) 23843.3 cm-1
Scaled (by 0.9586) Zero Point Vibrational Energy (zpe) 22856.2 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 B1B95/6-311G*
ABC
0.29585 0.07170 0.05915

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.541 -0.245 0.054
H2 2.687 -0.866 -0.830
H3 3.360 0.473 0.113
H4 2.578 -0.889 0.932
C5 1.217 0.471 -0.017
H6 1.056 1.089 0.872
H7 1.183 1.120 -0.902
O8 0.199 -0.520 -0.104
N9 -1.379 1.156 0.075
H10 -0.743 1.842 -0.292
H11 -2.355 1.381 -0.002
C12 -1.109 -0.187 -0.011
O13 -1.950 -1.040 0.032

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 O8 N9 H10 H11 C12 O13
C11.08981.09111.08971.50702.15762.14922.36274.16283.90675.15933.65054.5605
H21.08981.77051.76622.14773.06292.49212.61484.63074.40375.58233.94254.7201
H31.09111.77051.77072.14702.50282.48763.32014.78824.34495.78814.51895.5220
H41.08971.76621.77072.14552.49643.05672.62104.53604.47095.51033.86984.6192
C51.50702.14772.14702.14551.09421.09761.42352.68632.40783.68622.41713.5096
H62.15763.06292.50282.49641.09421.77852.06812.56322.27163.53362.66353.7784
H72.14922.49212.48763.05671.09761.77852.07172.74212.14603.66002.78443.9184
O82.36272.61483.32012.62101.42352.06812.07172.30922.55013.18591.35312.2156
N94.16284.63074.78824.53602.68632.56322.74212.30921.00441.00471.37252.2698
H103.90674.40374.34494.47092.40782.27162.14602.55011.00441.70102.08043.1413
H115.15935.58235.78815.51033.68623.53363.66003.18591.00471.70102.00312.4554
C123.65053.94254.51893.86982.41712.66352.78441.35311.37252.08042.00311.1991
O134.56054.72015.52204.61923.50963.77843.91842.21562.26983.14132.45541.1991

picture of Urethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 111.092 C1 C5 H7 110.220
C1 C5 O8 107.432 H2 C1 H3 108.541
H2 C1 H4 108.261 H2 C1 C5 110.566
H3 C1 H4 108.573 H3 C1 C5 110.434
H4 C1 C5 110.399 C5 O8 C12 121.023
H6 C5 H7 108.475 H6 C5 O8 109.765
H7 C5 O8 109.853 O8 C12 N9 115.824
O8 C12 O13 120.359 N9 C12 O13 123.779
H10 N9 H11 115.696 H10 N9 C12 121.378
H11 N9 C12 113.939
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability