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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-322.781225
Energy at 298.15K-322.790838
HF Energy-321.850087
Nuclear repulsion energy250.024525
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 MP3/6-31G*
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 3630 3407 4.45      
2 A 3606 3385 205.14      
3 A 3537 3320 4.91      
4 A 3218 3020 6.03      
5 A 3181 2986 23.29      
6 A 3107 2916 20.76      
7 A 3103 2913 2.87      
8 A 1946 1827 261.77      
9 A 1733 1627 41.94      
10 A 1558 1462 16.95      
11 A 1550 1455 2.77      
12 A 1493 1401 436.60      
13 A 1470 1380 10.35      
14 A 1447 1358 13.70      
15 A 1384 1299 33.35      
16 A 1295 1216 7.00      
17 A 1269 1191 9.73      
18 A 1201 1127 6.71      
19 A 1148 1077 60.14      
20 A 1054 990 0.58      
21 A 987 926 80.07      
22 A 938 880 60.53      
23 A 848 796 53.83      
24 A 827 776 72.17      
25 A 753 707 13.86      
26 A 569 534 9.31      
27 A 548 515 0.95      
28 A 423 397 6.59      
29 A 379 356 19.74      
30 A 304 285 16.16      
31 A 291 273 13.61      
32 A 238 224 0.86      
33 A 75 70 1.32      

Unscaled Zero Point Vibrational Energy (zpe) 24555.1 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 23047.4 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 MP3/6-31G*
ABC
0.16244 0.11555 0.07183

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.042 1.374 -0.068
C2 1.491 -1.119 -0.167
C3 0.644 0.027 0.376
C4 -0.844 -0.180 0.051
O5 -1.539 0.955 -0.110
O6 -1.353 -1.271 -0.015
H7 1.330 1.342 -1.045
H8 1.847 1.700 0.461
H9 1.109 -2.077 0.189
H10 1.457 -1.129 -1.262
H11 0.696 0.028 1.473
H12 2.533 -1.005 0.149
H13 -0.879 1.681 -0.056

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.53451.47292.44662.61513.56861.01921.01643.46082.80422.07472.81551.9458
C22.53451.52542.52573.67232.85252.61792.90941.09121.09542.15371.09433.6701
C31.47291.52541.53652.42092.41372.05452.06202.16312.16421.09812.16462.2893
C42.44662.52571.53651.34121.20552.87113.30762.72582.81402.10663.47681.8648
O52.61513.67232.42091.34122.23583.04203.51314.03693.82762.89154.52620.9823
O63.56862.85252.41371.20552.23583.88434.39212.59923.07812.84673.89832.9900
H71.01922.61792.05452.87113.04203.88431.63203.64182.48442.91022.89542.4438
H81.01642.90942.06203.30763.51314.39211.63203.85743.33522.26732.80792.7744
H93.46081.09122.16312.72584.03692.59923.64183.85741.76782.50031.78204.2587
H102.80421.09542.16422.81403.82763.07812.48443.33521.76783.06611.77833.8486
H112.07472.15371.09812.10662.89152.84672.91022.26732.50033.06612.48872.7480
H122.81551.09432.16463.47684.52623.89832.89542.80791.78201.77832.48874.3471
H131.94583.67012.28931.86480.98232.99002.44382.77444.25873.84862.74804.3471

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.404 N1 C3 C4 108.755
N1 C3 H11 106.691 C2 C3 C4 111.152
C2 C3 H11 109.276 C3 N1 H7 109.714
C3 N1 H8 110.516 C3 C2 H9 110.417
C3 C2 H10 110.258 C3 C2 H12 110.355
C3 C4 O5 114.380 C3 C4 O6 122.886
C4 C3 H11 104.959 C4 O5 H13 105.718
O5 C4 O6 122.698 H7 N1 H8 106.596
H9 C2 H10 107.891 H9 C2 H12 109.251
H10 C2 H12 108.610
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP3/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.898      
2 C -0.485      
3 C -0.115      
4 C 0.806      
5 O -0.730      
6 O -0.565      
7 H 0.358      
8 H 0.365      
9 H 0.213      
10 H 0.167      
11 H 0.214      
12 H 0.163      
13 H 0.506      


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 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 163.092
(<r2>)1/2 12.771