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

using model chemistry: QCISD/6-31G*

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*
 hartrees
Energy at 0K-244.475478
Energy at 298.15K 
HF Energy-243.816835
Nuclear repulsion energy123.125933
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*
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' 3792 3611 70.07      
2 A' 3758 3579 76.95      
3 A' 3660 3485 69.24      
4 A' 1891 1800 498.77      
5 A' 1658 1579 151.31      
6 A' 1490 1419 124.26      
7 A' 1276 1215 217.07      
8 A' 1109 1056 30.65      
9 A' 983 936 33.77      
10 A' 589 561 39.60      
11 A' 493 470 6.30      
12 A" 779 742 43.79      
13 A" 606 577 75.24      
14 A" 495 471 67.96      
15 A" 301i 286i 311.02      

Unscaled Zero Point Vibrational Energy (zpe) 11137.7 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 10606.4 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 QCISD/6-31G*
ABC
0.38269 0.36151 0.18590

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.131 0.000
O2 -0.075 1.347 0.000
N3 1.144 -0.600 0.000
O4 -1.087 -0.693 0.000
H5 2.025 -0.111 0.000
H6 1.121 -1.607 0.000
H7 -1.857 -0.096 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.21861.35711.36412.03942.06791.8710
O21.21862.29652.27742.55633.18682.2931
N31.35712.29652.23321.00751.00803.0433
O41.36412.27742.23323.16632.38980.9746
H52.03942.55631.00753.16631.74823.8824
H62.06793.18681.00802.38981.74823.3397
H71.87102.29313.04330.97463.88243.3397

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 118.449 C1 N3 H6 121.227
C1 O4 H7 105.043 O2 C1 N3 126.066
O2 C1 O4 123.629 N3 C1 O4 110.306
H5 N3 H6 120.324
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-244.475812
Energy at 298.15K-244.480693
HF Energy-243.816644
Nuclear repulsion energy123.039517
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*
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 3757 3578 79.21      
2 A 3751 3572 51.55      
3 A 3629 3456 49.63      
4 A 1893 1802 464.77      
5 A 1672 1592 123.30      
6 A 1488 1417 130.75      
7 A 1281 1220 176.90      
8 A 1129 1075 69.59      
9 A 983 936 32.03      
10 A 780 743 67.01      
11 A 597 569 87.53      
12 A 586 558 61.32      
13 A 509 485 24.68      
14 A 472 449 20.88      
15 A 404 385 322.01      

Unscaled Zero Point Vibrational Energy (zpe) 11464.6 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 10917.8 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 QCISD/6-31G*
ABC
0.38254 0.36006 0.18592

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.041 0.124 -0.002
O2 -0.480 1.259 0.008
N3 1.279 -0.225 -0.062
O4 -0.825 -0.991 0.003
H5 1.935 0.511 0.160
H6 1.535 -1.168 0.196
H7 -1.741 -0.659 0.006

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.21731.36641.36312.01982.04731.8724
O21.21732.30272.27602.53353.16042.2953
N31.36642.30272.24011.01011.01063.0523
O41.36312.27602.24013.14602.37470.9747
H52.01982.53351.01013.14601.72573.8612
H62.04733.16041.01062.37471.72573.3214
H71.87242.29533.05230.97473.86123.3214

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 115.587 C1 N3 H6 118.153
C1 O4 H7 105.224 O2 C1 N3 125.969
O2 C1 O4 123.687 N3 C1 O4 110.314
H5 N3 H6 117.301
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability