
An ExperimentFeCl3Turn redTurn red>+ KSCN-(NH)2SO4·Fe2(SO4)3No changeK,[Fe (CN)a]Fe 3++ 6 SCN- =[Fe (SCN)3- I (blood red )业1
1 FeCl3 (NH4 ) 2 SO4·Fe2 (SO4 ) 3 + KSCN K3 [Fe (CN)6 ] Fe 3++ 6 SCN - = [ Fe(SCN)6 3- ] (blood red ) Turn red Turn red No change An Experiment

Werner1893年在《无机化学领域中的新见解》书中提出络合物的配位理论,提出了配位数这个重要概态,是配位化学的奠基人。"in recognition of his work on the linkage of atoms inmolecules by which he has thrown new light onAlfredWerner(维尔纳earlier investigations and opened up new fields of1866~1919)researchespeciallyin inorganic chemistryIn19132
2 ◼ Werner 1893年在《 无机化学领域中的新见解》 一书中提出 络合物 的配位理 论, 提出了 配位 数 这个重要概念,是配位化学 的奠基人 。 "in recognition of his work on the linkage of atoms in molecules by which he has thrown new light on earlier investigations and opened up new fields of research especially in inorganic chemistry" Alfred Werner (维尔纳 1866~1919) In 1913

Chapter10CoordinationCompound10-1 Concepts of Coordination compounds10-2 Chemical bond theories of coordinationcompounds10-3 Complex-ion Equilibria3
3 Chapter 10 Coordination Compound 10-1 Concepts of Coordination compounds 10-2 Chemical bond theories of coordination compounds 10-3 Complex-ion Equilibria

10-1 Concepts of Coordinationcompounds>Definition>Nomenclature>Type>Importance4
4 10-1 Concepts of Coordination compounds ➢Definition ➢Nomenclature ➢Type ➢Importance

DefinitionFe(CO)s[ Fe(SCN)3- ]A coordination compound includes a unitcomposed of a centrall metal atom or ionsurrounded by a number of negativelycharged ions or neutral molecules calledligands, in which the atoms possessing lonepair joined to the central metal by chemicalbonds.5
5 Definition A coordination compound includes a unit composed of a central metal atom or ion, surrounded by a number of negatively charged ions or neutral molecules called ligands, in which the atoms possessing lone pair joined to the central metal by chemical bonds. [ Fe(SCN)6 3- ] Fe(CO)5

[ML.M= a centralmetal atom or ionL = ligandn = the number of ligandscoordinated atom = atom possessing lone pairCN = the number of coordinated atoms6
6 M= a central metal atom or ion L = ligand n = the number of ligands coordinated atom = atom possessing lone pair CN = the number of coordinated atoms [MLn ]

ExamplesCoordinatedCNMLExamplenstructureatom22NAg +NHLinearAg (NH)2*3cFe 3+66CN-[Fe (CN)]3Octahedronc55FeCOFe(CO) 5Trigonalbipyramidc4Ni4COTetrahedronNi (CO)47
7 Examples Example M L n Coordinated atom CN structure Ag (NH3 ) 2 + Ag + NH 3 2 N 2 Linear [Fe (CN)6 ] 3- Fe 3+ CN- 6 C 6 Octahedron Fe(CO) 5 Fe CO 5 C 5 Trigonal bipyramid Ni (CO)4 Ni CO 4 C 4 Tetrahedron

配位化合物的组成(1)内界与外界[Ag(NH,, |CINi(CO)个中心原子1↑配位体个中心离子↑配位体外界中心体一中心离子或原子配离子(配分子)配位体一中性分子或阴离子中心体一提供空轨道电子对接受体Lewis酸配位体一提供孤对电子电子对给予体Lewis碱8
8 Ag(NH ) Cl Ni(CO) 3 2 4 ← 中 心 离 子 ← 中 心 原 子 ← 配 位 体 ← 外 界 ← 配 位 体 中心体 — 中心离子或原子 配位体 — 中性分子或阴离子 配离子 (配分子) 中心体 — 提供空轨道, 电子对接受体 Lewis酸 配位体 — 提供孤对电子, 电子对给予体 Lewis碱 (1) 内界与外界 配位化合物的组成

中心离子或中心原子,具有(2)中心体空轨道能接受孤电子对的原子或离子绝大多数为金属离子如Fe3+、Cu2+、Co2+、Ni2+、Ag少数为非金属离子。如B3+、Si4+[BF4]-、[SiF-]?-金属原子,如Ni、Fe9
9 (2)中心体——中心离子或中心原子,具有 空轨道能接受孤电子对的原子或离子 . 绝大多数为金属离子 如 Fe3+ 、Cu2+ 、Co2+ 、Ni2+ 、Ag+ 少数为非金属离子,如B3+ 、Si4+ [BF4 ] -、[SiF6 ] 2- 金属原子,如Ni、Fe

(3)酉配位体(简称配体)能提供孤电子对的分子或离子如[Cu(NH.)4]2+[Fe(CO)s]配体CONH3常见的配体阴离子:X-、OH、CN-中性分子:NH3、H,O、CO、RNH(胺)10
10 (3)配位体(简称配体) 如 [Cu(NH3 )4 ] 2+ [Fe(CO)5 ] 配体 NH3 CO 常见的配体 阴离子:X-、OH-、CN- 中性分子:NH3、H2O、CO、RNH2 (胺) 能提供孤电子对的分子或离子