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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCSD(T)=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 1A'
1 3 no C2V 1A1

Conformer 1 (C2)

Jump to S1C2 S1C3
Vibrational Frequencies calculated at CCSD(T)=FULL/6-31G*
Rotational Constants (cm-1) from geometry optimized at CCSD(T)=FULL/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CCSD(T)=FULL/6-31G*
 hartrees
Energy at 0K-224.659309
Energy at 298.15K-224.665236
HF Energy-223.978837
Nuclear repulsion energy123.107550
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 CCSD(T)=FULL/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' 3693 3585        
2 A' 3579 3474        
3 A' 1849 1795        
4 A' 1686 1636        
5 A' 1213 1178        
6 A' 970 941        
7 A' 771 748        
8 A' 569 552        
9 A' 513 498        
10 A' 458 444        
11 A" 3690 3582        
12 A" 3571 3466        
13 A" 1670 1622        
14 A" 1457 1414        
15 A" 1056 1025        
16 A" 573 557        
17 A" 489 475        
18 A" 211 205        

Unscaled Zero Point Vibrational Energy (zpe) 14007.9 cm-1
Scaled (by 0.9707) Zero Point Vibrational Energy (zpe) 13597.5 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 CCSD(T)=FULL/6-31G*
ABC
0.37012 0.34231 0.17917

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.141 0.000
O2 0.046 1.366 0.000
N3 0.046 -0.611 1.168
N4 0.046 -0.611 -1.168
H5 -0.185 -0.065 1.990
H6 -0.348 -1.545 1.161
H7 -0.185 -0.065 -1.990
H8 -0.348 -1.545 -1.161

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22531.38921.38922.01012.07752.01012.0775
O21.22532.29552.29552.46193.15802.46193.1580
N31.38922.29552.33551.01371.01393.21312.5402
N41.38922.29552.33553.21312.54021.01371.0139
H52.01012.46191.01373.21311.70383.98043.4854
H62.07753.15801.01392.54021.70383.48542.3227
H72.01012.46193.21311.01373.98043.48541.7038
H82.07753.15802.54021.01393.48542.32271.7038

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.608 C1 N3 H6 118.825
C1 N4 H7 112.608 C1 N4 H8 118.825
O2 C1 N3 122.671 O2 C1 N4 122.671
N3 C1 N4 114.403 H5 N3 H6 114.343
H7 N4 H8 114.343
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCSD(T)=FULL/6-31G*
 hartrees
Energy at 0K-224.657321
Energy at 298.15K 
HF Energy-223.979240
Nuclear repulsion energy123.385043
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 CCSD(T)=FULL/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 3762 3652        
2 A1 3635 3528        
3 A1 1841 1787        
4 A1 1657 1609        
5 A1 1164 1129        
6 A1 988 959        
7 A1 481 467        
8 A2 367 356        
9 A2 509i 494i        
10 B1 759 736        
11 B1 574 557        
12 B1 408i 396i        
13 B2 3760 3650        
14 B2 3626 3520        
15 B2 1655 1607        
16 B2 1464 1421        
17 B2 1008 979        
18 B2 558 542        

Unscaled Zero Point Vibrational Energy (zpe) 13191.0 cm-1
Scaled (by 0.9707) Zero Point Vibrational Energy (zpe) 12804.5 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 CCSD(T)=FULL/6-31G*
ABC
0.37084 0.34632 0.17908

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/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 1.370
N3 0.000 1.158 -0.601
N4 0.000 -1.158 -0.601
H5 0.000 2.029 -0.092
H6 0.000 1.182 -1.610
H7 0.000 -2.029 -0.092
H8 0.000 -1.182 -1.610

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22761.37641.37642.04272.11432.04272.1143
O21.22762.28652.28652.50113.20642.50113.2064
N31.37642.28652.31611.00921.00913.22772.5486
N41.37642.28652.31613.22772.54861.00921.0091
H52.04272.50111.00923.22771.73844.05843.5524
H62.11433.20641.00912.54861.73843.55242.3648
H72.04272.50113.22771.00924.05843.55241.7384
H82.11433.20642.54861.00913.55242.36481.7384

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.966 C1 N3 H6 124.100
C1 N4 H7 116.966 C1 N4 H8 124.100
O2 C1 N3 122.717 O2 C1 N4 122.717
N3 C1 N4 114.566 H5 N3 H6 118.934
H7 N4 H8 118.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability