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All results from a given calculation for NH2CH2CH2COOH (β–alanine)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-322.769192
Energy at 298.15K-322.779105
HF Energy-321.858608
Nuclear repulsion energy246.900032
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 MP2/6-31G*
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 3623 3416 9.13      
2 A 3524 3323 2.19      
3 A 3277 3090 673.70      
4 A 3191 3010 4.92      
5 A 3164 2984 16.86      
6 A 3102 2925 5.55      
7 A 3087 2912 52.39      
8 A 1859 1753 291.97      
9 A 1713 1615 37.70      
10 A 1575 1485 4.27      
11 A 1528 1441 18.62      
12 A 1523 1436 298.19      
13 A 1456 1373 8.95      
14 A 1408 1327 5.86      
15 A 1355 1278 3.27      
16 A 1328 1252 15.06      
17 A 1284 1210 69.97      
18 A 1179 1112 7.16      
19 A 1119 1055 4.72      
20 A 1063 1002 16.99      
21 A 1015 957 74.43      
22 A 976 921 56.39      
23 A 941 887 28.66      
24 A 897 846 53.83      
25 A 832 784 12.09      
26 A 703 663 9.59      
27 A 581 548 3.43      
28 A 500 471 9.88      
29 A 411 388 15.53      
30 A 340 320 8.29      
31 A 292 275 7.61      
32 A 210 198 4.18      
33 A 90 85 0.33      

Unscaled Zero Point Vibrational Energy (zpe) 24571.2 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 23170.6 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 MP2/6-31G*
ABC
0.23906 0.08338 0.06618

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.943 0.550 0.186
C2 1.353 -0.668 -0.400
C3 0.023 -0.979 0.282
C4 -1.091 0.037 0.025
O5 -0.700 1.323 -0.067
O6 -2.259 -0.292 -0.059
H7 2.716 0.886 -0.386
H8 2.325 0.344 1.108
H9 2.016 -1.540 -0.323
H10 1.185 -0.477 -1.464
H11 -0.357 -1.948 -0.049
H12 0.174 -1.049 1.368
H13 0.296 1.353 0.009

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.47452.45653.08152.76544.29281.01831.01932.15222.08613.40382.66141.8409
C21.47451.52682.57892.87903.64772.06722.05951.09801.09432.16472.15852.3168
C32.45651.52681.52942.43762.40743.34332.78072.15762.15681.09241.09852.3632
C43.08152.57891.52941.34691.21643.92193.59713.50192.76782.11772.14141.9117
O52.76542.87902.43761.34692.24463.45823.38993.95452.95713.28872.90670.9993
O64.29283.64772.40741.21642.24465.12304.77314.46163.72432.52202.92083.0394
H71.01832.06723.34333.92193.45825.12301.63672.52592.31634.19403.64432.4957
H81.01932.05952.78073.59713.38994.77311.63672.38582.93073.71282.57562.5187
H92.15221.09802.15763.50193.95454.46162.52592.38581.76662.42372.54853.3818
H102.08611.09432.15682.76782.95713.72432.31632.93071.76662.55803.06082.5117
H113.40382.16471.09242.11773.28872.52204.19403.71282.42372.55801.76033.3651
H122.66142.15851.09852.14142.90672.92083.64432.57562.54853.06081.76032.7621
H131.84092.31682.36321.91170.99933.03942.49572.51873.38182.51173.36512.7621

picture of β–alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 109.847 N1 C2 H9 112.744
N1 C2 H10 107.676 C2 N1 H7 110.712
C2 N1 H8 110.001 C2 C3 C4 115.091
C2 C3 H11 110.377 C2 C3 H12 109.529
C3 C2 H9 109.485 C3 C2 H10 109.637
C3 C4 O5 115.725 C3 C4 O6 122.089
C4 C3 H11 106.557 C4 C3 H12 108.019
C4 O5 H13 108.222 O5 C4 O6 122.162
H7 N1 H8 106.883 H9 C2 H10 107.375
H11 C3 H12 106.918
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability