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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCD/6-31G**

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**
 hartrees
Energy at 0K-224.661622
Energy at 298.15K-224.667926
HF Energy-223.998406
Nuclear repulsion energy123.650833
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**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3791 3554 32.81      
2 A 3672 3443 3.54      
3 A 1906 1787 387.93      
4 A 1687 1582 0.04      
5 A 1226 1150 3.49      
6 A 981 920 7.01      
7 A 663 621 129.28      
8 A 481 451 2.43      
9 A 409 384 81.88      
10 B 3791 3554 23.59      
11 B 3669 3440 46.67      
12 B 1697 1591 197.35      
13 B 1470 1378 192.78      
14 B 1104 1035 20.26      
15 B 810 759 164.97      
16 B 603 565 253.25      
17 B 571 535 73.28      
18 B 455 427 42.71      

Unscaled Zero Point Vibrational Energy (zpe) 14492.0 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 13587.7 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**
ABC
0.36990 0.34706 0.18110

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.146
O2 0.000 0.000 1.363
N3 0.000 1.159 -0.619
N4 0.000 -1.159 -0.619
H5 0.223 1.973 -0.070
H6 0.505 1.111 -1.489
H7 -0.223 -1.973 -0.070
H8 -0.505 -1.111 -1.489

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21701.38911.38911.99712.04051.99712.0405
O21.21702.29652.29652.44873.10242.44873.1024
N31.38912.29652.31811.00681.00713.18752.4829
N41.38912.29652.31813.18752.48291.00681.0071
H51.99712.44871.00683.18751.68403.97083.4718
H62.04053.10241.00712.48291.68403.47182.4409
H71.99712.44873.18751.00683.97083.47181.6840
H82.04053.10242.48291.00713.47182.44091.6840

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 111.945 C1 N3 H6 115.852
C1 N4 H7 111.945 C1 N4 H8 115.852
O2 C1 N3 123.444 O2 C1 N4 123.444
N3 C1 N4 113.112 H5 N3 H6 113.486
H7 N4 H8 113.486
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CCD/6-31G**
 hartrees
Energy at 0K-224.659086
Energy at 298.15K-224.664982
HF Energy-223.996579
Nuclear repulsion energy123.706512
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**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3823 3584 36.01      
2 A' 3699 3468 11.88      
3 A' 1893 1775 419.82      
4 A' 1702 1595 19.04      
5 A' 1222 1146 4.65      
6 A' 990 928 11.64      
7 A' 783 734 65.93      
8 A' 558 523 101.26      
9 A' 505 473 113.95      
10 A' 450 422 248.31      
11 A" 3820 3582 27.74      
12 A" 3691 3461 45.75      
13 A" 1690 1584 209.19      
14 A" 1475 1383 197.45      
15 A" 1065 998 17.83      
16 A" 584 548 35.90      
17 A" 464 435 112.83      
18 A" 195 183 32.38      

Unscaled Zero Point Vibrational Energy (zpe) 14303.3 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 13410.8 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**
ABC
0.37372 0.34522 0.18059

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.141 0.000
O2 0.042 1.360 0.000
N3 0.042 -0.607 1.163
N4 0.042 -0.607 -1.163
H5 -0.173 -0.072 1.986
H6 -0.318 -1.545 1.157
H7 -0.173 -0.072 -1.986
H8 -0.318 -1.545 -1.157

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21891.38341.38342.00572.07052.00572.0705
O21.21892.28492.28492.45773.14702.45773.1470
N31.38342.28492.32621.00491.00453.20162.5279
N41.38342.28492.32623.20162.52791.00491.0045
H52.00572.45771.00493.20161.69663.97223.4738
H62.07053.14701.00452.52791.69663.47382.3133
H72.00572.45773.20161.00493.97223.47381.6966
H82.07053.14702.52791.00453.47382.31331.6966

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.284 C1 N3 H6 119.386
C1 N4 H7 113.284 C1 N4 H8 119.386
O2 C1 N3 122.683 O2 C1 N4 122.683
N3 C1 N4 114.436 H5 N3 H6 115.192
H7 N4 H8 115.192
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCD/6-31G**
 hartrees
Energy at 0K-224.657739
Energy at 298.15K 
HF Energy-223.997096
Nuclear repulsion energy123.941476
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**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3883 3641 61.57      
2 A1 3746 3513 11.64      
3 A1 1883 1766 486.65      
4 A1 1686 1581 3.61      
5 A1 1183 1109 0.27      
6 A1 1005 943 10.60      
7 A1 488 458 2.34      
8 A2 382 358 0.00      
9 A2 472i 443i 0.00      
10 B1 774 726 14.43      
11 B1 577 541 13.15      
12 B1 367i 344i 589.94      
13 B2 3881 3639 38.61      
14 B2 3739 3505 81.38      
15 B2 1686 1581 305.31      
16 B2 1483 1391 214.36      
17 B2 1027 962 9.15      
18 B2 573 537 16.34      

Unscaled Zero Point Vibrational Energy (zpe) 13579.1 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 12731.8 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**
ABC
0.37422 0.34875 0.18052

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.143
O2 0.000 0.000 1.364
N3 0.000 1.155 -0.599
N4 0.000 -1.155 -0.599
H5 0.000 2.019 -0.093
H6 0.000 1.174 -1.599
H7 0.000 -2.019 -0.093
H8 0.000 -1.174 -1.599

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22111.37271.37272.03242.10112.03242.1011
O21.22112.27762.27762.48983.18762.48983.1876
N31.37272.27762.30951.00101.00043.21342.5347
N41.37272.27762.30953.21342.53471.00101.0004
H52.03242.48981.00103.21341.72654.03723.5302
H62.10113.18761.00042.53471.72653.53022.3486
H72.03242.48983.21341.00104.03723.53021.7265
H82.10113.18762.53471.00043.53022.34861.7265

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 123.846
C1 N4 H7 116.926 C1 N4 H8 123.846
O2 C1 N3 122.728 O2 C1 N4 122.728
N3 C1 N4 114.545 H5 N3 H6 119.228
H7 N4 H8 119.228
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability