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

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-321.957467
Energy at 298.15K-321.967076
Nuclear repulsion energy248.450949
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 B3LYP/3-21G*
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 3508 3375 5.52      
2 A 3411 3281 0.66      
3 A 3149 3029 5.09      
4 A 3121 3002 24.37      
5 A 3077 2960 9.03      
6 A 3056 2939 13.40      
7 A 2829 2722 333.66      
8 A 1808 1740 270.90      
9 A 1707 1643 36.83      
10 A 1566 1507 10.01      
11 A 1556 1496 9.51      
12 A 1477 1421 411.92      
13 A 1455 1399 9.10      
14 A 1394 1341 19.41      
15 A 1334 1284 5.18      
16 A 1246 1199 2.24      
17 A 1196 1150 27.50      
18 A 1145 1102 27.58      
19 A 1087 1046 68.32      
20 A 1065 1025 58.89      
21 A 1036 997 10.96      
22 A 950 914 50.99      
23 A 831 800 110.58      
24 A 781 751 8.37      
25 A 724 697 3.42      
26 A 576 554 1.66      
27 A 525 505 0.31      
28 A 416 400 15.05      
29 A 377 363 13.63      
30 A 334 321 14.17      
31 A 278 267 12.99      
32 A 241 232 0.86      
33 A 86 83 2.20      

Unscaled Zero Point Vibrational Energy (zpe) 23670.6 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 22771.2 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 B3LYP/3-21G*
ABC
0.15596 0.11709 0.07176

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.105 1.318 -0.020
C2 1.400 -1.226 -0.229
C3 0.653 -0.046 0.402
C4 -0.866 -0.137 0.062
O5 -1.391 1.087 -0.185
O6 -1.485 -1.195 0.046
H7 1.502 1.306 -0.967
H8 1.772 1.743 0.629
H9 0.853 -2.142 0.012
H10 1.418 -1.124 -1.320
H11 0.733 -0.095 1.494
H12 2.427 -1.300 0.141
H13 -0.551 1.699 -0.149

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.57031.49822.45212.51253.61001.02581.02293.46982.78442.10482.93771.7040
C22.57031.53262.53043.62542.89822.63993.11341.09311.09662.16641.09413.5166
C31.49821.53261.55882.40942.45302.10252.12232.14142.17081.09642.18842.1897
C42.45212.53041.55881.35531.22532.95773.28852.64112.84612.14633.49301.8750
O52.51253.62542.40941.35532.29553.00453.33083.93743.75082.95394.51481.0399
O63.61002.89822.45301.22532.29554.02514.42472.52323.20942.86803.91483.0468
H71.02582.63992.10252.95773.00454.02511.67653.64252.45722.93412.97922.2438
H81.02293.11342.12233.28853.33084.42471.67654.03983.48532.28153.15152.4494
H93.46981.09312.14142.64113.93742.52323.64254.03981.76922.53021.78944.0924
H102.78441.09662.17082.84613.75083.20942.45723.48531.76923.07391.78433.6353
H112.10482.16641.09642.14632.95392.86802.93412.28152.53023.07392.48102.7499
H122.93771.09412.18843.49304.51483.91482.97923.15151.78941.78432.48104.2360
H131.70403.51662.18971.87501.03993.04682.24382.44944.09243.63532.74994.2360

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 116.002 N1 C3 C4 106.650
N1 C3 H11 107.418 C2 C3 C4 109.875
C2 C3 H11 109.875 C3 N1 H7 111.447
C3 N1 H8 113.324 C3 C2 H9 108.119
C3 C2 H10 110.214 C3 C2 H12 111.759
C3 C4 O5 111.349 C3 C4 O6 123.098
C4 C3 H11 106.569 C4 O5 H13 102.234
O5 C4 O6 125.545 H7 N1 H8 109.840
H9 C2 H10 107.799 H9 C2 H12 109.793
H10 C2 H12 109.072
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.692      
2 C -0.551      
3 C -0.216      
4 C 0.691      
5 O -0.577      
6 O -0.491      
7 H 0.298      
8 H 0.299      
9 H 0.235      
10 H 0.194      
11 H 0.245      
12 H 0.189      
13 H 0.378      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.656 2.003 0.420 6.015
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.211 1.098 -0.508
y 1.098 -36.669 0.238
z -0.508 0.238 -33.118
Traceless
 xyz
x -4.317 1.098 -0.508
y 1.098 -0.505 0.238
z -0.508 0.238 4.823
Polar
3z2-r29.645
x2-y2-2.541
xy1.098
xz-0.508
yz0.238


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.106 0.436 0.130
y 0.436 6.738 -0.098
z 0.130 -0.098 4.540


<r2> (average value of r2) Å2
<r2> 163.963
(<r2>)1/2 12.805