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All results from a given calculation for CH3CH(NH2)COOH (Alanine)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-323.407653
Energy at 298.15K-323.417187
HF Energy-323.106182
Nuclear repulsion energy249.651211
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 B2PLYP/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 3602 3419 4.83      
2 A 3507 3329 0.70      
3 A 3447 3272 241.13      
4 A 3194 3032 6.83      
5 A 3156 2996 27.52      
6 A 3089 2932 21.11      
7 A 3084 2928 6.53      
8 A 1865 1770 242.79      
9 A 1712 1625 35.10      
10 A 1548 1469 11.24      
11 A 1540 1462 3.22      
12 A 1465 1390 426.03      
13 A 1452 1379 4.02      
14 A 1426 1353 4.39      
15 A 1357 1288 19.88      
16 A 1264 1200 7.48      
17 A 1241 1178 11.56      
18 A 1173 1113 8.11      
19 A 1120 1063 55.03      
20 A 1040 987 0.93      
21 A 969 920 74.23      
22 A 911 865 61.51      
23 A 875 830 102.29      
24 A 813 771 11.89      
25 A 736 699 9.50      
26 A 564 535 6.46      
27 A 535 508 0.87      
28 A 416 394 5.82      
29 A 371 352 18.69      
30 A 304 288 16.55      
31 A 282 267 13.93      
32 A 232 220 0.50      
33 A 75 72 1.35      

Unscaled Zero Point Vibrational Energy (zpe) 24180.8 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 22952.4 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 B2PLYP/6-31G*
ABC
0.16140 0.11539 0.07170

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.051 1.363 -0.055
C2 1.481 -1.137 -0.177
C3 0.644 0.016 0.375
C4 -0.851 -0.176 0.056
O5 -1.505 0.981 -0.121
O6 -1.385 -1.259 -0.005
H7 1.320 1.356 -1.036
H8 1.852 1.692 0.474
H9 1.102 -2.095 0.183
H10 1.439 -1.151 -1.271
H11 0.703 0.007 1.470
H12 2.525 -1.029 0.128
H13 -0.824 1.683 -0.074

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.53981.47052.44882.58523.57891.01751.01513.46592.81912.06932.81541.9018
C22.53981.52842.53303.66152.87402.64162.92741.09071.09462.15151.09373.6437
C31.47051.52841.54082.40732.42662.05922.06842.16862.16841.09702.16602.2657
C42.44882.53301.54081.34061.20892.87263.31252.74082.82022.10943.48311.8636
O52.58523.66152.40731.34062.24562.99343.48314.04333.81212.89084.51050.9795
O63.57892.87402.42661.20892.24563.90104.40682.63093.09692.85333.91982.9954
H71.01752.64162.05922.87262.99343.90101.63583.66562.52012.91162.91402.3726
H81.01512.92742.06843.31253.48314.40681.63583.87163.36142.26952.82422.7316
H93.46591.09072.16862.74084.04332.63093.66563.87161.76582.49701.77924.2479
H102.81911.09462.16842.82023.81213.09692.52013.36141.76583.06521.77593.8186
H112.06932.15151.09702.10942.89082.85332.91162.26952.49703.06522.48862.7429
H122.81541.09372.16603.48314.51053.91982.91402.82421.77921.77592.48864.3139
H131.90183.64372.26571.86360.97952.99542.37262.73164.24793.81862.74294.3139

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.741 N1 C3 C4 108.796
N1 C3 H11 106.499 C2 C3 C4 111.240
C2 C3 H11 108.963 C3 N1 H7 110.387
C3 N1 H8 111.320 C3 C2 H9 110.679
C3 C2 H10 110.425 C3 C2 H12 110.289
C3 C4 O5 113.147 C3 C4 O6 123.447
C4 C3 H11 104.953 C4 O5 H13 105.828
O5 C4 O6 123.394 H7 N1 H8 107.178
H9 C2 H10 107.813 H9 C2 H12 109.075
H10 C2 H12 108.492
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.825      
2 C -0.467      
3 C -0.099      
4 C 0.695      
5 O -0.648      
6 O -0.510      
7 H 0.338      
8 H 0.343      
9 H 0.201      
10 H 0.159      
11 H 0.196      
12 H 0.153      
13 H 0.467      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.696 0.303 0.127
y 0.303 7.225 -0.081
z 0.127 -0.081 5.067


<r2> (average value of r2) Å2
<r2> 162.283
(<r2>)1/2 12.739