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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCD/3-21G*

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/3-21G*
 hartrees
Energy at 0K-223.161066
Energy at 298.15K-223.167097
HF Energy-222.732314
Nuclear repulsion energy122.319580
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/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 3681 3521 24.45      
2 A 3560 3405 5.77      
3 A 1810 1731 315.48      
4 A 1725 1650 0.33      
5 A 1195 1143 2.25      
6 A 942 901 8.31      
7 A 520 497 29.05      
8 A 488 467 16.60      
9 A 324 310 112.76      
10 B 3679 3519 18.99      
11 B 3555 3401 36.95      
12 B 1708 1634 141.94      
13 B 1424 1362 283.15      
14 B 1065 1019 35.03      
15 B 775 741 127.43      
16 B 577 551 131.86      
17 B 563 538 140.66      
18 B 399 381 339.10      

Unscaled Zero Point Vibrational Energy (zpe) 13995.0 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 13386.2 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 CCD/3-21G*
ABC
0.35845 0.34376 0.17648

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.153
O2 0.000 0.000 1.390
N3 0.000 1.161 -0.622
N4 0.000 -1.161 -0.622
H5 0.066 2.031 -0.108
H6 0.381 1.148 -1.559
H7 -0.066 -2.031 -0.108
H8 -0.381 -1.148 -1.559

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.23761.39571.39572.04872.09592.04872.0959
O21.23762.32292.32292.52463.18772.52463.1877
N31.39572.32292.32251.01231.01223.23412.5211
N41.39572.32292.32253.23412.52111.01231.0122
H52.04872.52461.01233.23411.72804.06423.5230
H62.09593.18771.01222.52111.72803.52302.4191
H72.04872.52463.23411.01234.06423.52301.7280
H82.09593.18772.52111.01223.52302.41911.7280

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 115.680 C1 N3 H6 120.177
C1 N4 H7 115.680 C1 N4 H8 120.177
O2 C1 N3 123.690 O2 C1 N4 123.690
N3 C1 N4 112.620 H5 N3 H6 117.189
H7 N4 H8 117.189
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-223.160467
Energy at 298.15K 
HF Energy-222.734229
Nuclear repulsion energy122.496137
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/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' 3719 3557 32.09      
2 A' 3594 3437 9.21      
3 A' 1797 1719 364.59      
4 A' 1725 1650 0.14      
5 A' 1181 1130 1.48      
6 A' 953 912 12.38      
7 A' 782 748 89.76      
8 A' 571 546 63.45      
9 A' 496 475 2.23      
10 A' 337 322 717.27      
11 A" 3716 3554 25.01      
12 A" 3586 3430 47.43      
13 A" 1700 1626 156.32      
14 A" 1428 1366 321.91      
15 A" 1019 975 20.79      
16 A" 572 547 13.82      
17 A" 432 413 0.00      
18 A" 254i 243i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13675.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 13081.0 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/3-21G*
ABC
0.36126 0.34434 0.17630

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.149 0.000
O2 -0.000 1.389 0.000
N3 0.000 -0.610 1.162
N4 0.000 -0.610 -1.162
H5 -0.000 -0.111 2.040
H6 -0.000 -1.619 1.172
H7 -0.000 -0.111 -2.040
H8 -0.000 -1.619 -1.172

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.24021.38771.38772.05612.12132.05612.1213
O21.24022.31222.31222.53203.22852.53203.2285
N31.38772.31222.32361.00961.00913.24002.5428
N41.38772.31222.32363.24002.54281.00961.0091
H52.05612.53201.00963.24001.73944.07923.5481
H62.12133.22851.00912.54281.73943.54812.3445
H72.05612.53203.24001.00964.07923.54811.7394
H82.12133.22852.54281.00913.54812.34451.7394

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.246 C1 N3 H6 123.748
C1 N4 H7 117.246 C1 N4 H8 123.748
O2 C1 N3 123.154 O2 C1 N4 123.154
N3 C1 N4 113.692 H5 N3 H6 119.006
H7 N4 H8 119.006
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-223.160467
Energy at 298.15K 
HF Energy-222.734232
Nuclear repulsion energy122.497149
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/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 A1 3719 3557 32.08      
2 A1 3594 3437 9.23      
3 A1 1798 1720 364.88      
4 A1 1725 1650 0.08      
5 A1 1181 1130 1.45      
6 A1 953 911 12.41      
7 A1 497 475 2.22      
8 A2 431 412 0.00      
9 A2 255i 244i 0.00      
10 B1 782 748 89.75      
11 B1 571 546 63.04      
12 B1 336 321 717.74      
13 B2 3716 3554 25.01      
14 B2 3586 3430 47.34      
15 B2 1699 1626 156.12      
16 B2 1428 1366 321.92      
17 B2 1019 974 20.89      
18 B2 571 547 13.81      

Unscaled Zero Point Vibrational Energy (zpe) 13675.2 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 13080.3 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 CCD/3-21G*
ABC
0.36120 0.34441 0.17630

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.149
O2 0.000 0.000 1.389
N3 0.000 1.162 -0.610
N4 0.000 -1.162 -0.610
H5 0.000 2.040 -0.112
H6 0.000 1.172 -1.619
H7 0.000 -2.040 -0.112
H8 0.000 -1.172 -1.619

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.24001.38781.38782.05622.12132.05622.1213
O21.24002.31232.31232.53233.22852.53233.2285
N31.38782.31232.32341.00961.00913.23992.5423
N41.38782.31232.32343.23992.54231.00961.0091
H52.05622.53231.00963.23991.73954.07923.5476
H62.12133.22851.00912.54231.73953.54762.3436
H72.05622.53233.23991.00964.07923.54761.7395
H82.12133.22852.54231.00913.54762.34361.7395

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.244 C1 N3 H6 123.742
C1 N4 H7 117.244 C1 N4 H8 123.742
O2 C1 N3 123.169 O2 C1 N4 123.169
N3 C1 N4 113.662 H5 N3 H6 119.013
H7 N4 H8 119.013
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability