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root/group/trunk/OOPSE-4/forceFields/MnM.frc
Revision: 3434
Committed: Wed Jul 16 02:06:45 2008 UTC (16 years ago) by gezelter
File size: 16357 byte(s)
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File Contents

# Content
1 // This is the forcefield file for the Metal-NonMetal(MnM) Interaction Forcefield
2 //
3 // The sections are divided into AtomTypes
4 //
5
6
7 begin Options
8 Name = "MnM"
9 MetallicEnergyUnitScaling 23.0605423
10 end Options
11
12
13 begin BaseAtomTypes
14 //Name mass (amu)
15 CH4 16.05
16 CH3 15.04
17 CH2 14.03
18 CH 13.02
19 // Aromatic CH as in benzene
20 CHar 13.02
21 //
22 RCHar 12.0107
23 // CH3 (sp3) thiol/sulfide/disulfide
24 CH3S 15.04
25 // CH2 (sp3) thiol/sulfide/disulfide
26 CH2S 14.03
27 //CH (sp3) all other/thiol
28 CHS 13.02
29 //C (sp3) all other/thiol
30 CS 12.0107
31 // sulfone
32 SYZ 32.0655
33 // O in sulfone
34 //OY
35 // thiol S
36 SH 32.0655
37 //Thiol H
38 HS 1.0079
39 //Thiol S
40 S 32.0655
41 // Sulfoxide
42 SZ 32.0655
43 // Sulfur in disulfide
44 SS 32.0655
45 // Sulfur in aromatic (thiophene)
46 SP 32.0655
47 // sp2 carbon in thiophene
48 CS 12.0107
49 // Sulfur attached to gold
50 SAu 228.9807
51
52
53 //Water
54 SSD 18.0153
55 SSD1 18.0153
56 SSD_E 18.0153
57 SSD_RF 18.0153
58 O_TIP3P 15.9994
59 O_TIP4P 15.9994
60 O_TIP4P-Ew 15.9994
61 O_TIP5P 15.9994
62 O_TIP5P-E 15.9994
63 O_SPCE 15.9994
64 O_SPC 15.9994
65 H_TIP3P 1.0079
66 H_TIP4P 1.0079
67 H_TIP4P-Ew 1.0079
68 H_TIP5P 1.0079
69 H_SPCE 1.0079
70 H_SPC 1.0079
71 EP_TIP4P 0.0
72 EP_TIP4P-Ew 0.0
73 EP_TIP5P 0.0
74
75 //Standard Atoms
76 C 12.0107
77 S 32.0655
78 Ni 58.710
79 Cu 63.550
80 Rh 102.90550
81 Pd 106.42
82 Ag 107.8682
83 Ir 192.217
84 Pt 195.09
85 Au 196.97
86 end BaseAtomTypes
87
88 begin AtomTypes
89 end AtomTypes
90
91 begin DirectionalAtomTypes
92 //Name I_xx I_yy I_zz (All moments in (amu*Ang^2)
93 SSD 1.7696 0.6145 1.1550
94 SSD1 1.7696 0.6145 1.1550
95 SSD_E 1.7696 0.6145 1.1550
96 SSD_RF 1.7696 0.6145 1.1550
97 end DirectionalAtomTypes
98
99
100 begin LennardJonesAtomTypes
101 //Name epsilon sigma
102 SSD 0.152 3.051
103 SSD1 0.152 3.016
104 SSD_E 0.152 3.035
105 SSD_RF 0.152 3.019
106 O_TIP3P 0.1521 3.15061
107 O_TIP4P 0.1550 3.15365
108 O_TIP4P-Ew 0.16275 3.16435
109 O_TIP5P 0.16 3.12
110 O_TIP5P-E 0.178 3.097
111 O_SPCE 0.15532 3.16549
112 O_SPC 0.15532 3.16549
113 // From TraPPE-UA JPCB, 109, 24100 and JCPB 102,2569
114 CH4 0.2941 3.73
115 CH3 0.1947 3.75
116 CH2 0.09140 3.95
117 CH 0.0987 4.68
118 CS 0.0009935 6.40
119 CH3S 0.1947 3.75
120 CH2S 0.09140 3.95
121 CHS 0.0987 4.68
122 // From CPC 177 2007 S-S distance on gold surfaces is 4.45
123 S 0.3954 4.45
124 SH 0.4610 3.62
125 SS 0.3279 3.72
126 SP 0.3576 3.60
127 //From TraPPE-UA JPCB 104, 8008
128 CHar 0.1003 3.695
129 RCHar 0.04173 3.88
130 // ---- End From TraPPE-UA
131
132 end LennardJonesAtomTypes
133
134 begin SCAtomTypes
135 // Name epsilon(eV) c m n alpha(angstroms)
136 Ni 0.0073767 84.745 5.0 10.0 3.5157
137 Cu 0.0057921 84.843 5.0 10.0 3.6030
138 Rh 0.0024612 305.499 5.0 13.0 3.7984
139 Pd 0.0032864 148.205 6.0 12.0 3.8813
140 Ag 0.0039450 96.524 6.0 11.0 4.0691
141 Ir 0.0037674 224.815 6.0 13.0 3.8344
142 Pt 0.0097894 71.336 7.0 11.0 3.9163
143 Au 0.0078052 53.581 8.0 11.0 4.0651
144 end SCAtomTypes
145
146
147 // Metal non-metal interactions.
148 // Format: Metal Atom Type, Non-Metal Atom Type, Interaction Type, Interaction Parameters
149 // Where interaction type can be: MAW, LennardJones or ShiftedMorse or RepulsiveMorse
150 begin MetalNonMetalInteractions
151
152 //MAW (Metal Angular Water section)
153 // r_e, D_e beta ca1 cb1
154 Cu SSD_E MAW 2.5525 1.9850 1.1680 1.1250 0.750000
155 //Au SSD_E MAW 2.8170 1.7850 1.2680 1.2500 0.2050 0.0
156 //Au SSD_E MAW 2.7510 2.95 1.101 0.750000 0.750000
157 //1. 1.5 2.6500001 -3.000162356E-2 1.30999744
158 //Au SSD_E MAW 2.7 1.06 1.264 0.16 0.8
159 Au SSD_E MAW 2.68 0.6 1.33 0.95 -0.25
160
161 //LennardJones
162 // sigma epsilon
163 Au CH3 LennardJones 3.54 0.2146
164 Au CH2 LennardJones 3.54 0.1749
165 //Au SH LennardJones 2.40 8.465
166 Au S LennardJones 2.40 8.465
167
168 //Shifted Morse
169 // r0 D0 beta0
170 Au O_SPCE ShiftedMorse 3.70 0.0424 0.769
171
172 //Repulsive Morse
173 // r0 D0 beta0
174 Au H_SPCE RepulsiveMorse -1.00 0.00850 0.769
175
176
177 end MetalNonMetalInteractions
178
179
180 begin ChargeAtomTypes
181 // Name charge
182 O_TIP3P -0.834
183 O_SPCE -0.8476
184 O_SPC -0.82
185 H_TIP3P 0.417
186 H_TIP4P 0.520
187 H_TIP4P-Ew 0.52422
188 H_TIP5P 0.241
189 H_SPCE 0.4238
190 H_SPC 0.42
191 EP_TIP4P -1.040
192 EP_TIP4P-Ew -1.04844
193 EP_TIP5P -0.241
194 end ChargeAtomTypes
195
196 begin MultipoleAtomTypes
197 // OOPSE currently only supports charge-charge, charge-dipole,
198 // dipole-dipole, and charge-quadrupole interactions.
199 // Dipoles may be either traditional point-dipoles or split-dipoles.
200 // possible formats for a multipolar atom type are:
201 //
202 // Point-dipoles:
203 // name d phi theta psi dipole_moment
204 //
205 // Split-dipoles:
206 // name s phi theta psi dipole_moment splitdipole_distance
207 //
208 // Point-Quadrupoles:
209 // name q phi theta psi Qxx Qyy Qzz
210 //
211 // Atoms with both dipole and quadrupole moments:
212 // name dq phi theta psi dipole_moment Qxx Qyy Qzz
213 //
214 // Atoms with both split dipoles and quadrupole moments:
215 // name sq phi theta psi dipole_moment splitdipole_distance Qxx Qyy Qzz
216 //
217 // Euler angles are given in zxz convention in units of degrees.
218 //
219 // Charges are given in units of electrons.
220 //
221 // Dipoles are given in units of Debyes.
222 //
223 // Split dipole distances are given in units of Angstroms.
224 //
225 // Quadrupole moments are given in units of 10^-26 esu cm^2 (also known as an
226 // esu centi-barn)
227 //
228 SSD_E dq 0.0 0.0 0.0 2.42 -1.682 1.762 -0.08
229 SSD_RF dq 0.0 0.0 0.0 2.48 -1.682 1.762 -0.08
230 SSD dq 0.0 0.0 0.0 2.35 -1.682 1.762 -0.08
231 SSD1 dq 0.0 0.0 0.0 2.35 -1.682 1.762 -0.08
232 end MultipoleAtomTypes
233
234 begin StickyAtomTypes
235 //name w0 v0 (kcal/mol) v0p rl (Ang) ru rlp rup
236 SSD_E 0.07715 3.90 3.90 2.40 3.80 2.75 3.35
237 SSD_RF 0.07715 3.90 3.90 2.40 3.80 2.75 3.35
238 SSD 0.07715 3.7284 3.7284 2.75 3.35 2.75 4.0
239 SSD1 0.07715 3.6613 3.6613 2.75 3.35 2.75 4.0
240 end StickyAtomTypes
241
242
243 begin BondTypes
244
245 //Atom1 Atom2 Fixed
246 //V_Fixed = 0
247
248 //Atom1 Atom2 Harmonic b0 Kb (kcal/mol)
249 //V_Harmonic = 0.5*Kb(b- bo)^2
250 //Harmonic Examples
251 CH3 CH3 Harmonic 1.526 260
252 CH3 CH2 Harmonic 1.526 260
253 CH3 CH Harmonic 1.526 260
254 CH2 CH2 Harmonic 1.526 260
255 CH2 CH Harmonic 1.526 260
256 CH CH Harmonic 1.526 260
257 // fix the Kb for the thiol below:
258 S CH2 Harmonic 1.82 281
259 SH CH2 Harmonic 1.82 281
260
261 //Atom1 Atom2 Cubic b0 K3 K2 K1 K0
262 //V_Cubic = K3(b - b0)^3 + K2(b - b0)^2 + K1(b - b0) + K0
263
264
265 //Atom1 Atom2 Quartic b0 K4 K3 K2 K1 K0
266 //V_Quartic = K4(b - b0)^4 + K3(b - b0)^3 + K2(b - b0)^2 + K1(b - b0) + K0
267
268
269 //Atom1 Atom2 Polynomial b0 i Ki [j Kj]
270 //V_Quartic = Ki(b - b0)^i + Kj(b - b0)^j + ...
271
272
273 end BondTypes
274
275 begin BendTypes
276
277 //Harmonic
278 //Atom1 Atom2 Atom3 Harmonic Theta0 Ktheta
279 //V_Harmonic = 0.5*Ktheta(Theta - Theta0)^2
280 //Ktheta: kcal/mole/rad**2
281 //Theta0: degrees
282 //Harmonic examples
283 //
284 //CH3 CH2 CH3 Harmonic 114.0 117.68
285 //CH3 CH2 CH2 Harmonic 114.0 117.68
286 //CH3 CH2 CH Harmonic 114.0 117.68
287 //CH3 CH CH3 Harmonic 112.0 117.68
288 //CH3 CH CH2 Harmonic 112.0 117.68
289 //CH3 CH CH Harmonic 112.0 117.68
290 //CH2 CH2 CH2 Harmonic 114.0 117.68
291 //CH2 CH2 CH Harmonic 114.0 117.68
292 CH2 CH CH2 Harmonic 112.0 117.68
293 CH2 CH CH Harmonic 112.0 117.68
294 //CH CH2 CH Harmonic 114.0 117.68
295 CH CH CH Harmonic 112.0 117.68
296
297 //From Lubna et al.JPCB 109, 24100 (2005) TraPPE
298 CH3 CH2 SH Harmonic 96.0 67.220
299 CH2 CH2 SH Harmonic 96.0 67.220
300 CH2 CH2 S Harmonic 114.0 124.19
301 CH3 CH2 S Harmonic 114.0 124.19
302 CH3 CH2 CH3 Harmonic 114.0 124.19
303 CH3 CH2 CH2 Harmonic 114.0 124.19
304 CH2 CH2 CH2 Harmonic 114.0 124.19
305 CH3 CH2 CH Harmonic 114.0 124.19
306
307
308 //UreyBradley
309 //Atom1 Atom2 Atom3 UreyBradley Theta0 Ktheta S0 Kub
310 //V_UreyBradleyBend = Ktheta(Theta - Theta0)^2 + Kub(S - S0)^2
311 //Ktheta: kcal/mole/rad**2
312 //Theta0: degrees
313 //Kub: kcal/mole/A**2
314 //S0: A
315
316 //Cubic
317 //Atom1 Atom2 Atom3 Cubic Theta0 K3 K2 K1 K0
318 //V_Cubic = K3(Theta - Theta0)^3 + K2(Theta - Theta0)^2 + K1(Theta - Theta0) + K0
319
320 //Quartic
321 //Atom1 Atom2 Atom3 Quartic Theta0 K4 K3 K2 K1 K0
322 //V_Quartic = K4(Theta - Theta0)^4 + K3(Theta - Theta0)^3 + K2(Theta - Theta0)^2 + K1(Theta - Theta0) + K0
323
324 //Polynomial
325 //Atom1 Atom2 Atom3 Polynomial Theta0 i Ki [j Kj]
326 //V_Polynomial = Ki(Theta - Theta0)^i + Kj(Theta - Theta0)^j + ...
327
328 end BendTypes
329
330 begin TorsionTypes
331
332 // All thiol torsions from Kautman and Klein (J. Phys. Chem. 1989, 91, 4994-5001)
333
334 //S CH2 CH2 CH3 Polynomial 0 2.218 1 2.905 2 -3.136 3 -0.7313 4 6.272 5 -7.528
335 //S CH2 CH2 CH2 Polynomial 0 2.218 1 2.905 2 -3.136 3 -0.7313 4 6.272 5 -7.528
336 //S CH2 CH2 CH Polynomial 0 2.218 1 2.905 2 -3.136 3 -0.7313 4 6.272 5 -7.528
337 //S CH2 CH2 C Polynomial 0 2.218 1 2.905 2 -3.136 3 -0.7313 4 6.272 5 -7.528
338
339 // All type 1 possibilities from Dubbeldam et al. (J. Phys. Chem. B 2004, 108, 12301-12313)
340
341 //CH3 CH2 CH2 CH3 Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
342 //CH3 CH2 CH2 CH2 Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
343 //CH3 CH2 CH2 CH Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
344 //CH3 CH2 CH2 C Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
345 //CH2 CH2 CH2 CH2 Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
346 //CH2 CH2 CH2 CH Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
347 //CH2 CH2 CH2 C Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
348 //CH CH2 CH2 CH Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
349 //CH CH2 CH2 C Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
350 //C CH2 CH2 C Polynomial 0 2.3939 1 3.871 2 -0.7111 3 -3.864 4 1.4222 5 -3.111
351
352 // All type 2 possibilities:
353
354 //H CH CH2 CH3 Polynomial 0 2.7167 1 8.665 2 0.82669 3 -12.92 4 -1.653 5 3.2712
355 //H CH CH2 CH2 Polynomial 0 2.7161 1 8.665 2 0.82669 3 -12.92 4 -1.653 5 3.2712
356 //H CH CH2 CH Polynomial 0 2.7161 1 8.665 2 0.82669 3 -12.92 4 -1.653 5 3.2712
357 //H CH CH2 C Polynomial 0 2.7161 1 8.665 2 0.82669 3 -12.92 4 -1.653 5 3.2712
358
359 // All type 3 possibilities:
360
361 //CH3 C CH2 CH3 Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
362 //CH3 C CH2 CH2 Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
363 //CH3 C CH2 CH Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
364 //CH3 C CH2 C Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
365 //CH2 C CH2 CH2 Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
366 //CH2 C CH2 CH Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
367 //CH2 C CH2 C Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
368 //CH C CH2 CH Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
369 //CH C CH2 C Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
370 //C C CH2 C Polynomial 0 2.5701 1 7.710 2 0 3 -10.29 4 0 5 0
371
372 // All type 4 possibilities:
373
374 //CH3 C C CH3 Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
375 //CH3 C C CH2 Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
376 //CH3 C C CH Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
377 //CH3 C C C Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
378 //CH2 C C CH2 Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
379 //CH2 C C CH Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
380 //CH2 C C C Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
381 //CH C C CH Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
382 //CH C C C Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
383 //C C C C Polynomial 0 4.0652 1 12.20 2 0 3 -16.26 4 0 5 0
384
385 //All type 5 possibilities:
386
387 //CH3 C CH H Polynomial 0 3.1301 1 9.390 2 0 3 -12.52 4 0 5 0
388 //CH2 C CH H Polynomial 0 3.1301 1 9.390 2 0 3 -12.52 4 0 5 0
389 //CH C CH H Polynomial 0 3.1301 1 9.390 2 0 3 -12.52 4 0 5 0
390 //C C CH H Polynomial 0 3.1301 1 9.390 2 0 3 -12.52 4 0 5 0
391
392 //All type 6 possibilities:
393
394 //H CH CH H Polynomial 0 2.1706 1 5.609 2 -1.804 3 -5.976 4 3.6089 5 -3.6089
395
396 //Cubic
397 //Atom1 Atom2 Atom3 Atom4 Cubic k3 k2 k1 k0 ( all are kcal/mol )
398 //V_Cubic = k3(cos phi)^3 + k2(cos phi)^2 + k1(cos phi) + k0
399 //Cubic Examples
400 //CH3 CH2 CH2 CH3 Cubic 5.9602 -0.2568 -3.802 2.1586
401 CH3 CH2 CH CH3 Cubic 3.3254 -0.4215 -1.686 1.1661
402 CH3 CH CH CH3 Cubic 3.3254 -0.4215 -1.686 1.1661
403 //CH3 CH2 CH2 CH2 Cubic 5.9602 -0.2568 -3.802 2.1586
404 CH3 CH2 CH CH2 Cubic 3.3254 -0.4215 -1.686 1.1661
405 CH3 CH CH2 CH2 Cubic 3.3254 -0.4215 -1.686 1.1661
406 CH3 CH CH CH2 Cubic 3.3254 -0.4215 -1.686 1.1661
407 //CH3 CH2 CH2 CH Cubic 5.9602 -0.2568 -3.802 2.1586
408 CH3 CH2 CH CH Cubic 3.3254 -0.4215 -1.686 1.1661
409 CH3 CH CH2 CH Cubic 3.3254 -0.4215 -1.686 1.1661
410 CH3 CH CH CH Cubic 3.3254 -0.4215 -1.686 1.1661
411 //CH2 CH2 CH2 CH2 Cubic 5.9602 -0.2568 -3.802 2.1586
412 CH2 CH2 CH CH2 Cubic 3.3254 -0.4215 -1.686 1.1661
413 CH2 CH CH CH2 Cubic 3.3254 -0.4215 -1.686 1.1661
414 CH2 CH2 CH2 CH Cubic 5.9602 -0.2568 -3.802 2.1586
415 CH2 CH2 CH CH Cubic 3.3254 -0.4215 -1.686 1.1661
416 CH2 CH CH2 CH Cubic 3.3254 -0.4215 -1.686 1.1661
417 CH2 CH CH CH Cubic 3.3254 -0.4215 -1.686 1.1661
418 CH CH2 CH2 CH Cubic 5.9602 -0.2568 -3.802 2.1586
419 CH CH2 CH CH Cubic 3.3254 -0.4215 -1.686 1.1661
420 CH CH CH CH Cubic 3.3254 -0.4215 -1.686 1.1661
421 //S CH2 CH2 CH2 Cubic 5.9602 -0.2568 -3.802 2.1586
422
423 //Opls
424 //Atom1 Atom2 Atom3 Atom4 Opls v1 v2 v3
425 //V_Opls = v1 / 2 * [1 + cos(phi)] + v2 / 2 * [1 - cos(2*phi)] + v3 / 2 * [1 + cos(3*phi)]
426 //units for v_n: kcal / mol
427
428
429 //Trappe
430 //Atom1 Atom2 Atom3 Atom4 Trappe c0 c1 c2 c3
431 //V_Opls = c0 + c1 * [1 + cos(phi)] + c2 * [1 - cos(2*phi)] + c3 * [1 + cos(3*phi)]
432 //units for c_n: kcal / mol
433
434 //From Martin et al. JPCB 120, 2569 (1998)
435 CH3 CH2 CH2 CH3 Trappe 0.0 0.70544 -0.13549 1.5723
436 CH3 CH2 CH2 CH2 Trappe 0.0 0.70544 -0.13549 1.5723
437 CH3 CH2 CH2 CH Trappe 0.0 0.70544 -0.13549 1.5723
438 CH2 CH2 CH2 CH2 Trappe 0.0 0.70544 -0.13549 1.5723
439
440
441 //From Lubna et al.JPCB 109, 24100 (2005)
442 CH3 CH2 CH2 SH Trappe 0.10507 -0.10342 0.036680 0.60874
443 CH2 CH2 CH2 SH Trappe 0.10507 -0.10342 0.036680 0.60874
444 // Thiol attached to a metal surface.
445 CH3 CH2 CH2 S Trappe 0.10507 -0.10342 0.036680 0.60874
446 CH2 CH2 CH2 S Trappe 0.10507 -0.10342 0.036680 0.60874
447 CH3 CH2 S CH2 Trappe 0.0 0.73041 -0.53685 1.1557
448 CH2 CH2 S CH2 Trappe 0.0 0.73041 -0.53685 1.1557
449 CH CH2 S CH2 Trappe 0.0 0.73041 -0.53685 1.1557
450 CH2 S S CH2 Trappe 3.5049 0.79083 -4.3348 1.003932
451 CH3 S S CH3 Trappe 3.5049 0.79083 -4.3348 1.003932
452 CH3 CH2 CH S Trappe -0.49886 0.85189 -0.22225 0.87680
453 CH3 CH2 CH S Trappe -0.49886 0.85189 -0.22225 0.87680
454 CH2 CH2 CH S Trappe -0.49886 0.85189 -0.22225 0.87680
455 CH CH2 CH S Trappe -0.49886 0.85189 -0.22225 0.87680
456 CH3 CH2 C S Trappe 0.0 0.0 0.0 0.91658
457 CH2 CH2 C S Trappe 0.0 0.0 0.0 0.91658
458 CH CH2 C S Trappe 0.0 0.0 0.0 0.91658
459 CH3 CG S H Trappe 0.0 0.0 0.0 0.79480
460 //From TraPPE-UA JPCB 104, 8008
461
462 //Charmm
463 //Atom1 Atom2 Atom3 Atom4 Charmm Kchi n delta [Kchi n delta]
464 //V_Charmm = Kchi(1 + cos(n(chi) - delta))
465 //Kchi: kcal/mole
466 //n: multiplicity
467 //delta: degrees
468 //in some cases, a Charmm may have two or three terms. If n is equal to 0, it falls back to harmonic form
469
470 //Quartic
471 //Atom1 Atom2 Atom3 Atom4 Quartic k4 k3 k2 k1 k0 ( all are kcal/mol )
472 //V_Quartic = k4(cos phi)^4 + k3(cos phi)^3 + k2(cos phi)^2 + k1(cos phi) + k0
473
474 //Polynomial
475 //Atom1 Atom2 Atom3 Atom4 Polynomial i Ki [j Kj]
476 //VPolynomial = Ki (cos phi)^i + ... + Kj (cos phi)^j
477
478
479 end TorsionTypes
480
481