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All results from a given calculation for NH2COOH (Carbamic acid)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS 1A'
1 2 yes C1 1A

Conformer 1 (CS)

Jump to S1C2
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-244.650658
Energy at 298.15K 
HF Energy-243.851997
Nuclear repulsion energy123.971754
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3881 3677 83.94      
2 A' 3848 3646 74.21      
3 A' 3708 3513 69.41      
4 A' 1891 1792 474.63      
5 A' 1642 1555 137.44      
6 A' 1479 1401 114.80      
7 A' 1268 1202 201.07      
8 A' 1100 1042 33.28      
9 A' 986 934 29.12      
10 A' 595 564 38.35      
11 A' 494 468 5.70      
12 A" 811 768 30.71      
13 A" 607 575 59.66      
14 A" 497 471 59.60      
15 A" 273i 259i 231.50      

Unscaled Zero Point Vibrational Energy (zpe) 11266.2 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 10673.6 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 QCISD/6-31G(2df,p)
ABC
0.38858 0.36537 0.18831

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.132 0.000
O2 -0.048 1.337 0.000
N3 1.127 -0.619 0.000
O4 -1.095 -0.666 0.000
H5 2.011 -0.150 0.000
H6 1.081 -1.619 0.000
H7 -1.841 -0.059 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.20681.35431.35422.03012.05771.8509
O21.20682.28242.26002.53943.16482.2728
N31.35432.28242.22211.00061.00073.0205
O41.35422.26002.22213.14772.37580.9618
H52.03012.53941.00063.14771.73843.8527
H62.05773.16481.00072.37581.73843.3128
H71.85092.27283.02050.96183.85273.3128

picture of Carbamic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.334 C1 N3 H6 121.066
C1 O4 H7 104.834 O2 C1 N3 125.949
O2 C1 O4 123.792 N3 C1 O4 110.259
H5 N3 H6 120.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-244.650924
Energy at 298.15K-244.655807
HF Energy-243.851890
Nuclear repulsion energy123.886323
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3879 3675 84.15      
2 A 3807 3607 58.77      
3 A 3678 3484 52.11      
4 A 1894 1794 447.35      
5 A 1651 1564 114.56      
6 A 1477 1399 119.18      
7 A 1274 1207 168.60      
8 A 1117 1058 65.26      
9 A 987 935 26.56      
10 A 809 767 44.56      
11 A 601 569 63.86      
12 A 587 557 63.97      
13 A 509 482 18.79      
14 A 472 447 17.57      
15 A 374 354 262.02      

Unscaled Zero Point Vibrational Energy (zpe) 11557.1 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 10949.2 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 QCISD/6-31G(2df,p)
ABC
0.38842 0.36396 0.18833

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.044 0.124 -0.003
O2 -0.480 1.248 0.008
N3 1.274 -0.221 -0.060
O4 -0.818 -0.985 0.003
H5 1.924 0.512 0.158
H6 1.529 -1.158 0.191
H7 -1.722 -0.658 0.007

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.20561.36341.35292.01182.03881.8517
O21.20562.28882.25862.51843.14032.2746
N31.36342.28882.22831.00341.00363.0289
O41.35292.25862.22833.12782.36120.9620
H52.01182.51841.00343.12781.71663.8321
H62.03883.14031.00362.36121.71663.2952
H71.85172.27463.02890.96203.83213.2952

picture of Carbamic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 115.588 C1 N3 H6 118.139
C1 O4 H7 104.989 O2 C1 N3 125.876
O2 C1 O4 123.861 N3 C1 O4 110.237
H5 N3 H6 117.590
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability