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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCSD(T)/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 CCSD(T)/6-31G*
 hartrees
Energy at 0K-224.648258
Energy at 298.15K-224.654537
HF Energy-223.980831
Nuclear repulsion energy122.957634
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)/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 3662 3524        
2 A 3552 3417        
3 A 1855 1785        
4 A 1673 1609        
5 A 1216 1170        
6 A 960 923        
7 A 699 672        
8 A 473 455        
9 A 406 391        
10 B 3662 3524        
11 B 3549 3415        
12 B 1681 1617        
13 B 1450 1395        
14 B 1096 1055        
15 B 804 773        
16 B 608 585        
17 B 561 540        
18 B 448 431        

Unscaled Zero Point Vibrational Energy (zpe) 14177.3 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 13640.0 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 CCSD(T)/6-31G*
ABC
0.36541 0.34384 0.17937

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.146
O2 0.000 0.000 1.371
N3 0.000 1.164 -0.624
N4 0.000 -1.164 -0.624
H5 0.234 1.979 -0.064
H6 0.534 1.113 -1.488
H7 -0.234 -1.979 -0.064
H8 -0.534 -1.113 -1.488

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22471.39601.39602.00342.04802.00342.0480
O21.22472.31002.31002.45533.11392.45533.1139
N31.39602.31002.32831.01581.01633.20082.4935
N41.39602.31002.32833.20082.49351.01581.0163
H52.00342.45531.01583.20081.69273.98463.4895
H62.04803.11391.01632.49351.69273.48952.4695
H72.00342.45533.20081.01583.98463.48951.6927
H82.04803.11392.49351.01633.48952.46951.6927

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 111.354 C1 N3 H6 115.295
C1 N4 H7 111.354 C1 N4 H8 115.295
O2 C1 N3 123.500 O2 C1 N4 123.500
N3 C1 N4 113.001 H5 N3 H6 112.811
H7 N4 H8 112.811
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-224.645287
Energy at 298.15K-224.651228
HF Energy-223.978539
Nuclear repulsion energy123.002569
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)/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' 3690 3550        
2 A' 3576 3441        
3 A' 1845 1776        
4 A' 1685 1621        
5 A' 1213 1167        
6 A' 967 931        
7 A' 768 739        
8 A' 572 550        
9 A' 514 495        
10 A' 458 440        
11 A" 3687 3548        
12 A" 3568 3433        
13 A" 1670 1606        
14 A" 1455 1399        
15 A" 1056 1016        
16 A" 573 551        
17 A" 495 476        
18 A" 217 209        

Unscaled Zero Point Vibrational Energy (zpe) 14004.3 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 13473.6 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)/6-31G*
ABC
0.36950 0.34157 0.17886

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.141 0.000
O2 0.047 1.366 0.000
N3 0.047 -0.612 1.169
N4 0.047 -0.612 -1.169
H5 -0.187 -0.065 1.990
H6 -0.353 -1.543 1.162
H7 -0.187 -0.065 -1.990
H8 -0.353 -1.543 -1.162

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22621.39101.39102.01032.07762.01032.0776
O21.22622.29782.29782.46253.15862.46253.1586
N31.39102.29782.33841.01401.01423.21512.5421
N41.39102.29782.33843.21512.54211.01401.0142
H52.01032.46251.01403.21511.70323.98073.4858
H62.07763.15861.01422.54211.70323.48582.3237
H72.01032.46253.21511.01403.98073.48581.7032
H82.07763.15862.54211.01423.48582.32371.7032

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.467 C1 N3 H6 118.651
C1 N4 H7 112.467 C1 N4 H8 118.651
O2 C1 N3 122.668 O2 C1 N4 122.668
N3 C1 N4 114.391 H5 N3 H6 114.228
H7 N4 H8 114.228
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-224.643155
Energy at 298.15K 
HF Energy-223.979023
Nuclear repulsion energy123.289791
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)/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 3619        
2 A1 3634 3496        
3 A1 1837 1767        
4 A1 1656 1593        
5 A1 1162 1118        
6 A1 986 949        
7 A1 480 462        
8 A2 367 353        
9 A2 513i 494i        
10 B1 752 724        
11 B1 574 552        
12 B1 417i 401i        
13 B2 3759 3617        
14 B2 3626 3488        
15 B2 1654 1592        
16 B2 1463 1407        
17 B2 1008 970        
18 B2 558 537        

Unscaled Zero Point Vibrational Energy (zpe) 13173.3 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 12674.0 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 CCSD(T)/6-31G*
ABC
0.37026 0.34571 0.17878

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/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 1.372
N3 0.000 1.159 -0.602
N4 0.000 -1.159 -0.602
H5 0.000 2.030 -0.092
H6 0.000 1.183 -1.611
H7 0.000 -2.030 -0.092
H8 0.000 -1.183 -1.611

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22871.37771.37772.04372.11542.04372.1154
O21.22872.28852.28852.50263.20842.50263.2084
N31.37772.28852.31841.00931.00933.22992.5506
N41.37772.28852.31843.22992.55061.00931.0093
H52.04372.50261.00933.22991.73904.06043.5544
H62.11543.20841.00932.55061.73903.55442.3667
H72.04372.50263.22991.00934.06043.55441.7390
H82.11543.20842.55061.00933.55442.36671.7390

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.942 C1 N3 H6 124.085
C1 N4 H7 116.942 C1 N4 H8 124.085
O2 C1 N3 122.712 O2 C1 N4 122.712
N3 C1 N4 114.576 H5 N3 H6 118.974
H7 N4 H8 118.974
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability