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

using model chemistry: MP2/CEP-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 MP2/CEP-31G
 hartrees
Energy at 0K-62.026509
Energy at 298.15K-62.035755
HF Energy-61.459788
Nuclear repulsion energy135.720388
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 MP2/CEP-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 3651 3528 6.55      
2 A 3525 3406 0.58      
3 A 3387 3273 209.24      
4 A 3163 3057 20.78      
5 A 3138 3032 56.08      
6 A 3088 2984 15.06      
7 A 3036 2934 28.58      
8 A 1712 1654 34.11      
9 A 1667 1611 181.25      
10 A 1528 1476 11.21      
11 A 1517 1466 2.34      
12 A 1452 1404 8.00      
13 A 1393 1346 10.88      
14 A 1345 1299 111.46      
15 A 1304 1260 263.86      
16 A 1250 1208 16.37      
17 A 1190 1150 20.15      
18 A 1135 1097 11.80      
19 A 1060 1024 67.19      
20 A 1028 994 4.87      
21 A 946 914 93.84      
22 A 880 851 153.45      
23 A 829 801 144.13      
24 A 765 739 6.78      
25 A 677 654 11.41      
26 A 538 520 5.33      
27 A 506 489 2.45      
28 A 397 384 3.08      
29 A 342 331 8.23      
30 A 283 273 12.24      
31 A 263 254 12.95      
32 A 228 220 0.51      
33 A 44 42 1.02      

Unscaled Zero Point Vibrational Energy (zpe) 23633.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 22836.6 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 MP2/CEP-31G
ABC
0.15124 0.10802 0.06786

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.157 1.336 0.021
C2 1.460 -1.222 -0.272
C3 0.669 -0.048 0.404
C4 -0.872 -0.148 0.070
O5 -1.467 1.091 -0.238
O6 -1.531 -1.227 0.092
H7 1.626 1.357 -0.895
H8 1.748 1.775 0.734
H9 1.021 -2.196 0.018
H10 1.405 -1.133 -1.379
H11 0.747 -0.137 1.509
H12 2.526 -1.191 0.039
H13 -0.729 1.772 -0.216

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.59161.51612.51392.64833.71491.02871.02583.53452.84842.13352.87351.9500
C22.59161.56852.59003.73093.01392.65793.17431.10781.11212.20371.11043.7091
C31.51611.56851.57982.50442.51602.13892.14412.21112.21281.11182.21082.3770
C42.51392.59001.57981.40861.26483.07133.31742.78922.87252.16663.55431.9467
O52.64833.73092.50441.40862.34223.17323.42814.13063.80753.07634.60751.0050
O63.71493.01392.51601.26482.34224.19754.49252.73113.28552.89654.05793.1201
H71.02872.65792.13893.07133.17324.19751.68663.71822.54612.96362.85902.4851
H81.02583.17432.14413.31743.42814.49251.68664.10083.61122.29313.14422.6530
H93.53451.10782.21112.78924.13062.73113.71824.10081.79702.55741.81034.3433
H102.84841.11212.21282.87253.80753.28552.54613.61121.79703.12491.80863.7872
H112.13352.20371.11182.16663.07632.89652.96362.29312.55743.12492.53672.9666
H122.87351.11042.21083.55434.60754.05792.85903.14421.81031.80862.53674.4087
H131.95003.70912.37701.94671.00503.12012.48512.65304.34333.78722.96664.4087

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 114.304 N1 C3 C4 108.568
N1 C3 H11 107.563 C2 C3 C4 110.701
C2 C3 H11 109.425 C3 N1 H7 112.989
C3 N1 H8 113.625 C3 C2 H9 110.228
C3 C2 H10 110.111 C3 C2 H12 110.055
C3 C4 O5 113.738 C3 C4 O6 123.993
C4 C3 H11 105.898 C4 O5 H13 106.317
O5 C4 O6 122.259 H7 N1 H8 110.354
H9 C2 H10 108.087 H9 C2 H12 109.392
H10 C2 H12 108.928
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability