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All results from a given calculation for NH2COOC2H5 (Urethane)

using model chemistry: HF/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/3-21G
 hartrees
Energy at 0K-320.080860
Energy at 298.15K-320.090213
Nuclear repulsion energy246.156844
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 HF/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 3937 3565 62.40      
2 A 3810 3450 55.18      
3 A 3302 2990 25.76      
4 A 3285 2975 22.19      
5 A 3245 2939 33.54      
6 A 3220 2916 14.25      
7 A 3206 2903 28.27      
8 A 1955 1770 607.41      
9 A 1819 1648 123.42      
10 A 1701 1540 5.56      
11 A 1672 1514 6.22      
12 A 1656 1499 5.43      
13 A 1580 1431 8.54      
14 A 1552 1405 26.65      
15 A 1440 1304 0.07      
16 A 1439 1303 500.84      
17 A 1289 1167 8.87      
18 A 1255 1137 37.50      
19 A 1198 1085 122.98      
20 A 1183 1071 24.56      
21 A 1034 936 1.92      
22 A 932 844 0.37      
23 A 907 822 16.28      
24 A 877 794 177.36      
25 A 635 575 201.57      
26 A 615 557 10.24      
27 A 597 540 10.75      
28 A 449 406 110.85      
29 A 392 355 2.41      
30 A 262 237 0.13      
31 A 216 195 3.57      
32 A 105 95 0.33      
33 A 38 34 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 25398.9 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 23001.3 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 HF/3-21G
ABC
0.29487 0.07023 0.05794

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.562 -0.270 0.001
H2 2.607 -0.899 -0.878
H3 3.409 0.406 0.002
H4 2.606 -0.900 0.878
C5 1.256 0.512 0.000
H6 1.178 1.134 0.883
H7 1.180 1.135 -0.882
O8 0.204 -0.479 -0.001
N9 -1.439 1.136 0.000
H10 -0.775 1.873 -0.002
H11 -2.406 1.371 0.001
C12 -1.124 -0.188 -0.000
O13 -1.941 -1.071 0.001

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 O8 N9 H10 H11 C12 O13
C11.08121.08341.08121.52252.16002.15992.36794.24103.96595.23273.68684.5742
H21.08121.76601.75542.14203.04572.48532.59254.61354.45985.57333.89814.6356
H31.08341.76601.76602.15582.50682.50663.32544.90264.43375.89524.57145.5504
H41.08121.75541.76602.14202.48533.04562.59264.61284.46045.57233.89724.6342
C51.52252.14202.15582.14201.08291.08291.44582.76612.44453.76182.48043.5677
H62.16003.04572.50682.48531.08291.76562.08222.76212.26813.69942.79763.9208
H72.15992.48532.50663.04561.08291.76562.08222.76332.26713.70112.79903.9228
O82.36792.59253.32542.59261.44582.08222.08222.30382.54773.19921.35892.2249
N94.24104.61354.90264.61282.76612.76212.76332.30380.99200.99581.36112.2637
H103.96594.45984.43374.46042.44452.26812.26712.54770.99201.70762.09033.1668
H115.23275.57335.89525.57233.76183.69943.70113.19920.99581.70762.01852.4854
C123.68683.89814.57143.89722.48042.79762.79901.35891.36112.09032.01851.2035
O134.57424.63565.55044.63423.56773.92083.92282.22492.26373.16682.48541.2035

picture of Urethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 110.872 C1 C5 H7 110.863
C1 C5 O8 105.797 H2 C1 H3 109.347
H2 C1 H4 108.537 H2 C1 C5 109.539
H3 C1 H4 109.347 H3 C1 C5 110.504
H4 C1 C5 109.536 C5 O8 C12 124.323
H6 C5 H7 109.212 H6 C5 O8 110.028
H7 C5 O8 110.030 O8 C12 N9 115.773
O8 C12 O13 120.406 N9 C12 O13 123.820
H10 N9 H11 118.427 H10 N9 C12 124.584
H11 N9 C12 116.989
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.597 -0.418   -0.499
2 H 0.236 0.134   0.159
3 H 0.200 0.082   0.110
4 H 0.236 0.134   0.159
5 C -0.106 0.549   0.470
6 H 0.206 -0.038   -0.007
7 H 0.206 -0.038   -0.007
8 O -0.708 -0.698   -0.661
9 N -0.964 -1.108   -1.076
10 H 0.366 0.417   0.405
11 H 0.374 0.440   0.435
12 C 1.195 1.261   1.216
13 O -0.642 -0.717   -0.703


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.621 5.253 -0.001 5.870
CHELPG 2.645 5.242 -0.001 5.872
AIM        
ESP 2.643 5.242 -0.001 5.871


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.941 -6.490 0.004
y -6.490 -36.155 -0.006
z 0.004 -0.006 -36.124
Traceless
 xyz
x 0.198 -6.490 0.004
y -6.490 -0.123 -0.006
z 0.004 -0.006 -0.076
Polar
3z2-r2-0.152
x2-y20.214
xy-6.490
xz0.004
yz-0.006


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.937 0.468 -0.002
y 0.468 5.686 -0.001
z -0.002 -0.001 3.729


<r2> (average value of r2) Å2
<r2> 193.433
(<r2>)1/2 13.908