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

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-320.070830
Energy at 298.15K-320.080989
Nuclear repulsion energy248.320852
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 HF/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 3750 3385 11.65      
2 A 3657 3301 3.88      
3 A 3387 3058 691.80      
4 A 3305 2983 4.73      
5 A 3271 2953 19.18      
6 A 3211 2898 18.69      
7 A 3205 2893 40.20      
8 A 1992 1798 397.48      
9 A 1836 1657 47.16      
10 A 1680 1516 5.31      
11 A 1626 1468 11.03      
12 A 1583 1429 343.77      
13 A 1546 1395 32.91      
14 A 1501 1354 4.04      
15 A 1439 1299 6.32      
16 A 1420 1282 14.22      
17 A 1333 1203 133.63      
18 A 1266 1143 15.58      
19 A 1127 1017 16.99      
20 A 1102 995 73.62      
21 A 1073 969 149.63      
22 A 1028 928 14.84      
23 A 966 872 45.61      
24 A 911 822 76.31      
25 A 860 776 17.52      
26 A 757 684 14.01      
27 A 613 553 5.02      
28 A 522 471 10.58      
29 A 431 389 15.72      
30 A 359 324 5.63      
31 A 323 291 7.80      
32 A 221 199 6.37      
33 A 89 80 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 25694.6 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 23192.0 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 HF/3-21G*
ABC
0.23988 0.08495 0.06727

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.906 0.554 0.140
C2 1.326 -0.713 -0.387
C3 -0.006 -1.004 0.322
C4 -1.078 0.043 0.028
O5 -0.628 1.303 -0.038
O6 -2.238 -0.237 -0.108
H7 2.621 0.940 -0.454
H8 2.248 0.460 1.083
H9 2.000 -1.553 -0.262
H10 1.155 -0.575 -1.446
H11 -0.401 -1.962 0.021
H12 0.158 -1.032 1.396
H13 0.354 1.358 0.072

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.48982.47333.02972.64884.22681.00591.00722.14722.08673.41622.67441.7493
C21.48981.53692.55452.82973.60702.10042.09451.08431.08152.17052.15562.3335
C32.47331.53691.52722.41672.39933.35852.79352.16032.15791.07941.08682.4022
C43.02972.55451.52721.33971.20153.83623.51403.47972.74622.11672.13421.9445
O52.64882.82972.41671.33972.22973.29543.19973.88822.94793.27412.85130.9898
O64.22683.60702.39931.20152.22975.01154.69394.44083.66302.52342.93873.0493
H71.00592.10043.35853.83623.29545.01151.65242.57622.32974.21653.65772.3642
H81.00722.09452.79353.51403.19974.69391.65242.43392.94313.74372.58772.3266
H92.14721.08432.16033.47973.88824.44082.57622.43391.75312.45232.53263.3609
H102.08671.08152.15792.74622.94793.66302.32972.94311.75312.54883.04632.5852
H113.41622.17051.07942.11673.27412.52344.21653.74372.45232.54881.75163.4054
H122.67442.15561.08682.13422.85132.93873.65772.58772.53263.04631.75162.7395
H131.74932.33352.40221.94450.98983.04932.36422.32663.36092.58523.40542.7395

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 109.591 N1 C2 H9 112.093
N1 C2 H10 107.431 C2 N1 H7 113.192
C2 N1 H8 112.592 C2 C3 C4 112.952
C2 C3 H11 110.900 C2 C3 H12 109.286
C3 C2 H9 109.804 C3 C2 H10 109.778
C3 C4 O5 114.757 C3 C4 O6 122.657
C4 C3 H11 107.345 C4 C3 H12 108.282
C4 O5 H13 112.309 O5 C4 O6 122.572
H7 N1 H8 110.326 H9 C2 H10 108.087
H11 C3 H12 107.915
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.827      
2 C -0.232      
3 C -0.573      
4 C 0.900      
5 O -0.763      
6 O -0.606      
7 H 0.331      
8 H 0.323      
9 H 0.223      
10 H 0.247      
11 H 0.266      
12 H 0.250      
13 H 0.462      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  7.162 -1.814 0.655 7.417
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.996 2.222 -0.686
y 2.222 -37.837 0.150
z -0.686 0.150 -33.195
Traceless
 xyz
x -4.481 2.222 -0.686
y 2.222 -1.241 0.150
z -0.686 0.150 5.722
Polar
3z2-r211.443
x2-y2-2.160
xy2.222
xz-0.686
yz0.150


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.701 0.642 0.169
y 0.642 5.213 -0.025
z 0.169 -0.025 4.392


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000