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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
1 2 no CS 1A'
1 3 no C2V 1A1

Conformer 1 (C2)

Jump to S1C2 S1C3
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-224.790328
Energy at 298.15K-224.796605
HF Energy-224.015482
Nuclear repulsion energy124.100312
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 CCD/6-31G(2df,p)
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 3763 3564 43.29      
2 A 3649 3457 4.68      
3 A 1903 1803 385.12      
4 A 1664 1576 0.67      
5 A 1218 1154 3.06      
6 A 975 923 6.59      
7 A 636 603 105.59      
8 A 480 454 1.98      
9 A 400 379 74.98      
10 B 3762 3563 26.02      
11 B 3646 3454 56.80      
12 B 1670 1582 184.35      
13 B 1453 1376 180.27      
14 B 1089 1032 19.68      
15 B 821 778 101.62      
16 B 597 566 181.24      
17 B 564 535 130.94      
18 B 451 427 57.01      

Unscaled Zero Point Vibrational Energy (zpe) 14370.8 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 13612.0 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 CCD/6-31G(2df,p)
ABC
0.37379 0.34874 0.18240

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.149
O2 0.000 0.000 1.355
N3 0.000 1.157 -0.615
N4 0.000 -1.157 -0.615
H5 0.242 1.968 -0.071
H6 0.487 1.104 -1.494
H7 -0.242 -1.968 -0.071
H8 -0.487 -1.104 -1.494

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.20591.38651.38651.99542.03931.99542.0393
O21.20592.28482.28482.44283.09472.44283.0947
N31.38652.28482.31351.00671.00653.18142.4745
N41.38652.28482.31353.18142.47451.00671.0065
H51.99542.44281.00673.18141.68303.96653.4641
H62.03933.09471.00652.47451.68303.46412.4140
H71.99542.44283.18141.00673.96653.46411.6830
H82.03933.09472.47451.00653.46412.41401.6830

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.002 C1 N3 H6 115.996
C1 N4 H7 112.002 C1 N4 H8 115.996
O2 C1 N3 123.458 O2 C1 N4 123.458
N3 C1 N4 113.084 H5 N3 H6 113.441
H7 N4 H8 113.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-224.788200
Energy at 298.15K-224.794097
HF Energy-224.013856
Nuclear repulsion energy124.171370
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 CCD/6-31G(2df,p)
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' 3794 3594 47.32      
2 A' 3675 3481 13.36      
3 A' 1891 1791 409.72      
4 A' 1676 1588 18.66      
5 A' 1215 1151 3.74      
6 A' 984 932 11.88      
7 A' 806 763 43.63      
8 A' 551 522 65.78      
9 A' 499 472 80.26      
10 A' 446 422 250.10      
11 A" 3791 3590 28.50      
12 A" 3667 3473 55.48      
13 A" 1660 1572 198.66      
14 A" 1457 1380 181.55      
15 A" 1052 996 16.78      
16 A" 585 554 33.89      
17 A" 453 429 105.15      
18 A" 203 192 34.54      

Unscaled Zero Point Vibrational Energy (zpe) 14200.5 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 13450.8 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 CCD/6-31G(2df,p)
ABC
0.37731 0.34723 0.18201

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.011 0.145 0.000
O2 0.042 1.352 0.000
N3 0.042 -0.604 1.160
N4 0.042 -0.604 -1.160
H5 -0.184 -0.072 1.981
H6 -0.317 -1.542 1.148
H7 -0.184 -0.072 -1.981
H8 -0.317 -1.542 -1.148

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.20761.38101.38102.00262.06642.00262.0664
O21.20762.27422.27422.45023.13372.45023.1337
N31.38102.27422.31971.00481.00393.19402.5170
N41.38102.27422.31973.19402.51701.00481.0039
H52.00262.45021.00483.19401.69483.96273.4602
H62.06643.13371.00392.51701.69483.46022.2966
H72.00262.45023.19401.00483.96273.46021.6948
H82.06643.13372.51701.00393.46022.29661.6948

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.210 C1 N3 H6 119.253
C1 N4 H7 113.210 C1 N4 H8 119.253
O2 C1 N3 122.792 O2 C1 N4 122.792
N3 C1 N4 114.248 H5 N3 H6 115.076
H7 N4 H8 115.076
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-224.786914
Energy at 298.15K 
HF Energy-224.013681
Nuclear repulsion energy124.437500
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 CCD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3856 3652 73.40      
2 A1 3722 3525 12.44      
3 A1 1877 1778 465.29      
4 A1 1657 1570 6.21      
5 A1 1175 1113 0.32      
6 A1 997 945 10.58      
7 A1 487 461 2.70      
8 A2 390 369 0.00      
9 A2 448i 424i 0.00      
10 B1 807 765 10.59      
11 B1 584 553 8.89      
12 B1 352i 334i 472.04      
13 B2 3853 3650 37.66      
14 B2 3713 3517 92.96      
15 B2 1653 1566 290.13      
16 B2 1466 1388 194.11      
17 B2 1014 961 9.42      
18 B2 574 544 16.11      

Unscaled Zero Point Vibrational Energy (zpe) 13512.3 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 12798.8 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 CCD/6-31G(2df,p)
ABC
0.37841 0.35070 0.18201

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.145
O2 0.000 0.000 1.356
N3 0.000 1.151 -0.596
N4 0.000 -1.151 -0.596
H5 0.000 2.015 -0.091
H6 0.000 1.169 -1.595
H7 0.000 -2.015 -0.091
H8 0.000 -1.169 -1.595

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21041.36921.36922.02892.09672.02892.0967
O21.21042.26582.26582.48063.17402.48063.1740
N31.36922.26582.30271.00050.99943.20652.5267
N41.36922.26582.30273.20652.52671.00050.9994
H52.02892.48061.00053.20651.72574.03033.5219
H62.09673.17400.99942.52671.72573.52192.3387
H72.02892.48063.20651.00054.03033.52191.7257
H82.09673.17402.52670.99943.52192.33871.7257

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.926 C1 N3 H6 123.796
C1 N4 H7 116.926 C1 N4 H8 123.796
O2 C1 N3 122.766 O2 C1 N4 122.766
N3 C1 N4 114.468 H5 N3 H6 119.278
H7 N4 H8 119.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability