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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP2/6-311G*

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 MP2/6-311G*
 hartrees
Energy at 0K-224.706416
Energy at 298.15K-224.712776
HF Energy-224.039736
Nuclear repulsion energy123.581436
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 MP2/6-311G*
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 3560 31.72      
2 A 3629 3448 3.05      
3 A 1861 1768 361.20      
4 A 1704 1619 0.84      
5 A 1225 1164 3.35      
6 A 965 917 7.26      
7 A 704 669 138.37      
8 A 483 459 4.15      
9 A 414 394 76.56      
10 B 3746 3560 22.38      
11 B 3625 3445 44.36      
12 B 1709 1624 202.64      
13 B 1448 1376 201.57      
14 B 1095 1041 26.61      
15 B 823 782 176.15      
16 B 617 586 316.09      
17 B 573 545 27.26      
18 B 473 450 25.21      

Unscaled Zero Point Vibrational Energy (zpe) 14420.0 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 13703.3 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 MP2/6-311G*
ABC
0.36888 0.34714 0.18088

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.150
O2 0.000 0.000 1.366
N3 0.000 1.157 -0.617
N4 0.000 -1.157 -0.617
H5 0.206 1.981 -0.078
H6 0.455 1.121 -1.515
H7 -0.206 -1.981 -0.078
H8 -0.455 -1.121 -1.515

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21551.38841.38842.00482.05792.00482.0579
O21.21552.29592.29592.45993.12412.45993.1241
N31.38842.29592.31391.00641.00693.19072.4899
N41.38842.29592.31393.19072.48991.00641.0069
H52.00482.45991.00643.19071.69323.98363.4817
H62.05793.12411.00692.48991.69323.48172.4193
H72.00482.45993.19071.00643.98363.48171.6932
H82.05793.12412.48991.00693.48172.41931.6932

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.711 C1 N3 H6 117.555
C1 N4 H7 112.711 C1 N4 H8 117.555
O2 C1 N3 123.561 O2 C1 N4 123.561
N3 C1 N4 112.877 H5 N3 H6 114.498
H7 N4 H8 114.498
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-224.703560
Energy at 298.15K-224.709557
HF Energy-224.037497
Nuclear repulsion energy123.605303
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 MP2/6-311G*
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' 3773 3585 32.01      
2 A' 3651 3469 10.47      
3 A' 1852 1760 392.97      
4 A' 1713 1628 24.64      
5 A' 1220 1159 4.23      
6 A' 971 923 11.29      
7 A' 791 751 64.09      
8 A' 579 550 225.75      
9 A' 522 496 133.75      
10 A' 472 448 92.59      
11 A" 3770 3582 25.75      
12 A" 3643 3462 40.84      
13 A" 1699 1614 196.19      
14 A" 1453 1381 214.64      
15 A" 1054 1002 25.65      
16 A" 581 552 40.51      
17 A" 490 465 141.00      
18 A" 219 208 15.47      

Unscaled Zero Point Vibrational Energy (zpe) 14225.6 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 13518.5 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 MP2/6-311G*
ABC
0.37305 0.34455 0.18029

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.001 0.143 0.000
O2 0.043 1.361 0.000
N3 0.043 -0.607 1.161
N4 0.043 -0.607 -1.161
H5 -0.166 -0.072 1.986
H6 -0.300 -1.551 1.161
H7 -0.166 -0.072 -1.986
H8 -0.300 -1.551 -1.161

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21831.38321.38322.00472.07572.00472.0757
O21.21832.28482.28482.45803.15362.45803.1536
N31.38322.28482.32271.00501.00483.19952.5301
N41.38322.28482.32273.19952.53011.00501.0048
H52.00472.45801.00503.19951.69943.97243.4798
H62.07573.15361.00482.53011.69943.47982.3213
H72.00472.45803.19951.00503.97243.47981.6994
H82.07573.15362.53011.00483.47982.32131.6994

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.209 C1 N3 H6 119.901
C1 N4 H7 113.209 C1 N4 H8 119.901
O2 C1 N3 122.740 O2 C1 N4 122.740
N3 C1 N4 114.201 H5 N3 H6 115.467
H7 N4 H8 115.467
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-224.701661
Energy at 298.15K 
HF Energy-224.037488
Nuclear repulsion energy123.807172
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 MP2/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3829 3638 54.79      
2 A1 3692 3509 8.97      
3 A1 1848 1756 463.08      
4 A1 1695 1611 0.26      
5 A1 1175 1117 0.05      
6 A1 986 937 10.89      
7 A1 489 465 2.56      
8 A2 346 329 0.00      
9 A2 540i 513i 0.00      
10 B1 773 735 3.52      
11 B1 569 541 14.02      
12 B1 438i 417i 592.46      
13 B2 3826 3636 35.76      
14 B2 3684 3501 73.96      
15 B2 1688 1604 283.44      
16 B2 1458 1385 248.48      
17 B2 1013 963 12.56      
18 B2 566 538 13.64      

Unscaled Zero Point Vibrational Energy (zpe) 13329.6 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 12667.1 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 MP2/6-311G*
ABC
0.37365 0.34762 0.18008

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

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 1.365
N3 0.000 1.156 -0.600
N4 0.000 -1.156 -0.600
H5 0.000 2.022 -0.094
H6 0.000 1.181 -1.601
H7 0.000 -2.022 -0.094
H8 0.000 -1.181 -1.601

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21921.37571.37572.03582.10842.03582.1084
O21.21922.27952.27952.49303.19242.49303.1924
N31.37572.27952.31261.00231.00173.21792.5427
N41.37572.27952.31263.21792.54271.00231.0017
H52.03582.49301.00233.21791.72594.04333.5395
H62.10843.19241.00172.54271.72593.53952.3617
H72.03582.49303.21791.00234.04333.53951.7259
H82.10843.19242.54271.00173.53952.36171.7259

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.890 C1 N3 H6 124.208
C1 N4 H7 116.890 C1 N4 H8 124.208
O2 C1 N3 122.803 O2 C1 N4 122.803
N3 C1 N4 114.394 H5 N3 H6 118.902
H7 N4 H8 118.902
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability