Ƅƶ ɉÑ ƅƶŻŻŻŻŻŻŻŻƅƴŻŻŻƅƴŻŻƅƴŻ 4lŌŚżƛƜŽŻƍŻƽ ŌŚȁȜȴȅȺƍŻ  4lŌŚÚǧ4Ÿ •  ŴĞŹú³Ú non empirical –  ǙǬǡǧ4lč4ǹĀõǥǘǦİnj = ab initioÚǣDZZǩǷǶdž –  ªBÚDžŢĥŭþïǦdzǵDžLjųlþŮljǧAÄǹMǵŏ ǯǖǣǐǢǑDžęĠúǦĘǹǕǶǖǣǐǢǑǶdž –  ȑȣȘǿȀǼɃGaussian, Spartan, GAMESS, NWChemǥǤ •  EĞŹú³Ú semi-empirical –  !ųlǧǮǹMǵNjDžč4ǹȠȲȭȺȒCǘǝǵĀõǙǶ –  ȑȣȘǿȀǼɃMOPAC(AM1, PM3, MOZYMEÚǥǤ) •  ĞŹú³Ú empirical –  HückelŐǢǨDžπųlǧǮǹNjDžĞŹȠȲȭȺȒǹïNjǶ •  t×ٰ(DF)ÚDŽdensity functional –  ųltǹc¾f°ǣǘǝKohn-Sham³ČǦǘǝǐnjdžų lþŮǹºAúǦMǵŏǯǐDžĹĔȉȎȘǨHartree-FockŐ ǣTČǢàǯdžŐDžûǺǦïNjǴǷǡNjǶdž 15 ĝÖĤ»'VøĂ§ƞNjƶǛǝƸǢ •  ěVď6ºƞĠƯŻß'RƞěVƅƗƇƬh JƞPƚƍƘûƏƬǤ°ÈÏVǖDŽǝǥƝƩƖƘƀƬ –  û÷ęƞěVď6ºƞāTðǪ0»ěV½Đ –  ěVĉÜƞƶLjǝƹǢ©ƞûǪĝ0»ěV½Đ –  "ŃŁ§ƞŎľŁƞ×ƟŻuƐ¾ƞƶLjǝƹǢƞƝſƬǣ •  ěV½ĐƞÝzƝƩƬÑØ»ƜÐk< –  ňŰŠŠŚťĬŋŠŚŦŦŚŧƝƩƬ0§ħňŋħŤŚťŧŨťŗŖŧŞţŢħŧŝŚţťŬǪŵ ĨňŋıĩŻǤňŋIJǥŻCǤňŋijǥ –  ĉÜď½µħľţŢśŞŜŨťŖŧŞţŢħńŢŧŚťŖŘŧŞţŢħĨľńǥǪŵ ſƪƮƝƒƭƓƭƞěV/öĉÜƯÝzŻSĉܧƚƧ@ơŵ ľńŎĨǧěV/öĉÜƣƙĩŻŻľńŎĿŻľńŎĿŏŻľńŎĿŏŌǡǡǡŁľń –  ×:ƺǛƾǀǢ§ħľţŨŤŠŚřħľŠŨŦŧŚťǪźljǔǝDžLJƱǠƢªÍVƯÛ ƫúƥźǩěV/öĉÜƣƙÝzƍƔľľŎĿĨŏĩƜƛ 16 ³ÚŁDžcٰęȼŒȽǦuǙǶǂ ĹĔȉȎȘǣuGl° •  ³ÚŁǣcٰęǧŠ ǧǝǰǦǨɇ –  ĹĔǘǝNjęǨuGl°ǦLǭǞǡNjǶǏ –  ¼ǙǶĹĔ·ŭǦǎǗǭǶǏ –  ĴǝNjæǹD4ǦĺŒǢǑǶǏ 48B(.E3> =/ (.E33N- A<5D"*1 -0%)3 7?%)F ŴĞŹú4lŌŚÚ CCSD(T)/QZP +C9 < ~2 kcal/mol KN 7 5 K 6 MP2/DZP $+C9 KN 5 K 10 B3LYP(DFT)/DZP $+C9 KN 3K4 K 102K HF/SZ +19 KN 4 K 102K EĞŹú4lŌŚÚ PM5,AM1,PM4,MNDO +19 KN 3 K 10 MOZYME8 +19 KN 1.38 K 104 17 @ŊèȼŢĥȽ° cٰęǧiǑǗ