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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-224.741687
Energy at 298.15K-224.748010
HF Energy-224.052466
Nuclear repulsion energy123.539832
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 3733 3548 35.26      
2 A 3617 3437 3.46      
3 A 1856 1764 351.19      
4 A 1640 1559 0.13      
5 A 1203 1144 3.35      
6 A 961 913 7.90      
7 A 687 653 124.79      
8 A 480 456 1.67      
9 A 405 385 72.48      
10 B 3733 3548 23.99      
11 B 3614 3434 47.36      
12 B 1649 1567 190.74      
13 B 1427 1356 188.50      
14 B 1074 1021 26.29      
15 B 809 769 141.65      
16 B 603 573 270.75      
17 B 568 540 41.28      
18 B 464 440 26.35      

Unscaled Zero Point Vibrational Energy (zpe) 14262.3 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 13552.0 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 MP2/6-311G**
ABC
0.36796 0.34755 0.18086

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 0.151
O2 0.000 0.000 1.366
N3 0.000 1.158 -0.622
N4 0.000 -1.158 -0.622
H5 0.236 1.973 -0.075
H6 0.514 1.097 -1.488
H7 -0.236 -1.973 -0.075
H8 -0.514 -1.097 -1.488

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21461.39271.39271.99972.03881.99972.0388
O21.21462.30072.30072.45403.10082.45403.1008
N31.39272.30072.31701.00921.00943.18752.4707
N41.39272.30072.31703.18752.47071.00921.0094
H51.99972.45401.00923.18751.68593.97383.4624
H62.03883.10081.00942.47071.68593.46242.4237
H71.99972.45403.18751.00923.97383.46241.6859
H82.03883.10082.47071.00943.46242.42371.6859

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 111.723 C1 N3 H6 115.227
C1 N4 H7 111.723 C1 N4 H8 115.227
O2 C1 N3 123.715 O2 C1 N4 123.715
N3 C1 N4 112.570 H5 N3 H6 113.272
H7 N4 H8 113.272
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-224.739122
Energy at 298.15K-224.745155
HF Energy-224.050485
Nuclear repulsion energy123.559146
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' 3758 3571 35.77      
2 A' 3637 3456 11.19      
3 A' 1848 1756 375.24      
4 A' 1654 1571 21.79      
5 A' 1198 1138 4.54      
6 A' 966 918 11.71      
7 A' 786 746 64.03      
8 A' 573 545 222.29      
9 A' 517 492 99.18      
10 A' 470 446 59.83      
11 A" 3755 3568 26.74      
12 A" 3629 3448 43.60      
13 A" 1641 1560 195.25      
14 A" 1431 1359 192.03      
15 A" 1038 987 25.41      
16 A" 579 550 42.66      
17 A" 492 468 136.21      
18 A" 248 236 9.75      

Unscaled Zero Point Vibrational Energy (zpe) 14110.5 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 13407.8 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 MP2/6-311G**
ABC
0.37160 0.34526 0.18032

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 0.007 0.147 0.000
O2 0.047 1.362 0.000
N3 0.047 -0.611 1.163
N4 0.047 -0.611 -1.163
H5 -0.191 -0.074 1.983
H6 -0.344 -1.539 1.143
H7 -0.191 -0.074 -1.983
H8 -0.344 -1.539 -1.143

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21591.38871.38872.00512.06662.00512.0666
O21.21592.29002.29002.45983.14222.45983.1422
N31.38872.29002.32701.00781.00743.20072.5168
N41.38872.29002.32703.20072.51681.00781.0074
H52.00512.45981.00783.20071.69563.96613.4557
H62.06663.14221.00742.51681.69563.45572.2861
H72.00512.45983.20071.00783.96613.45571.6956
H82.06663.14222.51681.00743.45572.28611.6956

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.610 C1 N3 H6 118.332
C1 N4 H7 112.610 C1 N4 H8 118.332
O2 C1 N3 122.957 O2 C1 N4 122.957
N3 C1 N4 113.825 H5 N3 H6 114.579
H7 N4 H8 114.579
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-224.736794
Energy at 298.15K 
HF Energy-224.050737
Nuclear repulsion energy123.792107
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 3825 3634 65.50      
2 A1 3687 3503 10.48      
3 A1 1845 1753 448.09      
4 A1 1641 1559 2.99      
5 A1 1156 1098 0.07      
6 A1 982 933 11.86      
7 A1 484 460 1.93      
8 A2 336 320 0.00      
9 A2 541i 514i 0.00      
10 B1 765 727 2.24      
11 B1 558 530 11.37      
12 B1 458i 435i 494.14      
13 B2 3822 3632 38.76      
14 B2 3679 3496 81.80      
15 B2 1639 1558 293.04      
16 B2 1438 1367 217.32      
17 B2 997 947 12.49      
18 B2 565 537 13.90      

Unscaled Zero Point Vibrational Energy (zpe) 13209.7 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 12551.9 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
0.37262 0.34852 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 0.148
O2 0.000 0.000 1.366
N3 0.000 1.155 -0.601
N4 0.000 -1.155 -0.601
H5 0.000 2.022 -0.097
H6 0.000 1.171 -1.604
H7 0.000 -2.022 -0.097
H8 0.000 -1.171 -1.604

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21821.37651.37652.03722.10702.03722.1070
O21.21822.28112.28112.49593.19232.49593.1923
N31.37652.28112.31001.00351.00283.21722.5331
N41.37652.28112.31003.21722.53311.00351.0028
H52.03722.49591.00353.21721.73094.04493.5314
H62.10703.19231.00282.53311.73093.53142.3424
H72.03722.49593.21721.00354.04493.53141.7309
H82.10703.19232.53311.00283.53142.34241.7309

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.863 C1 N3 H6 123.885
C1 N4 H7 116.863 C1 N4 H8 123.885
O2 C1 N3 122.959 O2 C1 N4 122.959
N3 C1 N4 114.083 H5 N3 H6 119.252
H7 N4 H8 119.252
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability