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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-224.543966
Energy at 298.15K-224.550325
HF Energy-223.983835
Nuclear repulsion energy124.153700
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 CISD/6-31G*
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 3810 3527 44.23      
2 A 3700 3426 5.35      
3 A 1938 1794 436.47      
4 A 1729 1601 0.03      
5 A 1254 1161 3.74      
6 A 1007 932 7.06      
7 A 669 619 119.49      
8 A 494 457 3.98      
9 A 415 385 88.89      
10 B 3810 3527 30.53      
11 B 3695 3421 60.86      
12 B 1737 1608 224.33      
13 B 1507 1395 205.30      
14 B 1129 1045 19.70      
15 B 839 777 180.94      
16 B 614 569 268.45      
17 B 586 542 89.36      
18 B 469 434 55.06      

Unscaled Zero Point Vibrational Energy (zpe) 14700.1 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 13609.4 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 CISD/6-31G*
ABC
0.37452 0.34907 0.18258

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.144
O2 0.000 0.000 1.356
N3 -0.123 1.148 -0.613
N4 0.123 -1.148 -0.613
H5 0.000 1.984 -0.068
H6 0.364 1.164 -1.493
H7 0.000 -1.984 -0.068
H8 -0.364 -1.164 -1.493

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21131.38131.38131.99542.04161.99542.0416
O21.21132.28272.28272.44173.09892.44173.0989
N31.38132.28272.31001.00571.00583.18212.4855
N41.38132.28272.31003.18212.48551.00571.0058
H51.99542.44171.00573.18211.68493.96833.4747
H62.04163.09891.00582.48551.68493.47472.4381
H71.99542.44173.18211.00573.96833.47471.6849
H82.04163.09892.48551.00583.47472.43811.6849

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.474 C1 N3 H6 116.698
C1 N4 H7 112.474 C1 N4 H8 116.698
O2 C1 N3 123.264 O2 C1 N4 123.264
N3 C1 N4 113.472 H5 N3 H6 113.776
H7 N4 H8 113.776
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-224.541442
Energy at 298.15K-224.547283
HF Energy-223.981726
Nuclear repulsion energy124.217995
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 CISD/6-31G*
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' 3843 3558 49.83      
2 A' 3728 3452 15.87      
3 A' 1923 1781 470.75      
4 A' 1736 1607 18.41      
5 A' 1245 1153 4.31      
6 A' 1016 940 10.74      
7 A' 811 751 70.57      
8 A' 569 527 64.55      
9 A' 508 470 66.81      
10 A' 438 405 400.84      
11 A" 3840 3555 35.48      
12 A" 3718 3443 59.22      
13 A" 1725 1597 244.19      
14 A" 1511 1399 208.99      
15 A" 1086 1005 15.39      
16 A" 596 552 31.64      
17 A" 459 425 91.43      
18 A" 153 142 43.82      

Unscaled Zero Point Vibrational Energy (zpe) 14451.8 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 13379.5 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 CISD/6-31G*
ABC
0.37812 0.34763 0.18206

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.010 0.140 0.000
O2 0.038 1.353 0.000
N3 0.038 -0.601 1.158
N4 0.038 -0.601 -1.158
H5 -0.160 -0.072 1.988
H6 -0.286 -1.551 1.161
H7 -0.160 -0.072 -1.988
H8 -0.286 -1.551 -1.161

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21341.37531.37532.00602.07202.00602.0720
O21.21342.27152.27152.45333.14382.45333.1438
N31.37532.27152.31651.00381.00333.19632.5269
N41.37532.27152.31653.19632.52691.00381.0033
H52.00602.45331.00383.19631.69923.97533.4810
H62.07203.14381.00332.52691.69923.48102.3219
H72.00602.45333.19631.00383.97533.48101.6992
H82.07203.14382.52691.00333.48102.32191.6992

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 114.050 C1 N3 H6 120.367
C1 N4 H7 114.050 C1 N4 H8 120.367
O2 C1 N3 122.558 O2 C1 N4 122.558
N3 C1 N4 114.745 H5 N3 H6 115.697
H7 N4 H8 115.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-224.540499
Energy at 298.15K 
HF Energy-223.981470
Nuclear repulsion energy124.396402
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 CISD/6-31G*
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 3887 3599 72.84      
2 A1 3762 3483 13.04      
3 A1 1913 1771 523.86      
4 A1 1715 1588 4.30      
5 A1 1210 1120 0.37      
6 A1 1028 952 9.14      
7 A1 500 463 2.84      
8 A2 403 373 0.00      
9 A2 467i 433i 0.00      
10 B1 805 745 24.14      
11 B1 592 548 12.48      
12 B1 340i 315i 660.01      
13 B2 3885 3596 44.89      
14 B2 3752 3474 92.34      
15 B2 1715 1587 335.49      
16 B2 1516 1403 216.36      
17 B2 1051 973 7.93      
18 B2 586 543 17.38      

Unscaled Zero Point Vibrational Energy (zpe) 13755.8 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 12735.1 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 CISD/6-31G*
ABC
0.37848 0.35047 0.18197

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.141
O2 0.000 0.000 1.356
N3 0.000 1.151 -0.595
N4 0.000 -1.151 -0.595
H5 0.000 2.015 -0.089
H6 0.000 1.176 -1.595
H7 0.000 -2.015 -0.089
H8 0.000 -1.176 -1.595

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21541.36651.36652.02842.09692.02842.0969
O21.21542.26572.26572.48023.17712.48023.1771
N31.36652.26572.30281.00101.00033.20672.5331
N41.36652.26572.30283.20672.53311.00101.0003
H52.02842.48021.00103.20671.72384.03053.5286
H62.09693.17711.00032.53311.72383.52862.3519
H72.02842.48023.20671.00104.03053.52861.7238
H82.09693.17712.53311.00033.52862.35191.7238

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.070 C1 N3 H6 123.996
C1 N4 H7 117.070 C1 N4 H8 123.996
O2 C1 N3 122.589 O2 C1 N4 122.589
N3 C1 N4 114.822 H5 N3 H6 118.934
H7 N4 H8 118.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability