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MacroModel Reference Manual - ISP

MacroModel Reference Manual - ISP

MacroModel Reference Manual - ISP

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Appendix C: Atom and Bond TypesTable C.2. Atom types and equivalents. (Continued)EquivalenciesNo. Symbol DescriptionMM2/MM3 Charmm Amber11 CP Carbocation (C + ) 3012 CR Carbon free radical 29...14 C0 Any carbon15 O2 Oxygen - double bond 7 O O, O216 O3 Oxygen - single bond 6 OH1, OH2 OS, OH17 OA United atom OH OH1E18 OM O − (alkoxide, carboxylate) 47 OC19 OW United atom H 2 O OH2E20 OP Oxonium (sp 2 ) =[O + ]–21 OQ Oxonium (sp 3 ) R 3 O +...23 O0 Any oxygen24 N1 Nitrogen - sp 1025 N2 Nitrogen - sp 2 9 N, NR, NP,NH1, NH226 N3 Nitrogen - sp 3 8 NH3 NT27 NA United atom NH - sp 328 NB United atom NH 2 - sp 3 NH1E29 NC United atom NH - sp 230 ND United atom NH 2 - sp 2 NH2E31 N4 N + - sp 2 NC2 NA32 N5 N + - sp 3 39 N333 NE United atom NH + - sp 334 NF United atom NH 2 + - sp 335 NG United atom NH 3 + - sp 3 NH3EN, NB, NC,N*, N2<strong>MacroModel</strong> 9.7 <strong>Reference</strong> <strong>Manual</strong> 183

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