UndefinedNameError: reference to undefined name 'jmol' (click for details) Callstack: at (Bookshelves/Inorganic_Chemistry/Supplemental_Modules_and_Websites_(Inorganic_Chemistry)/Coordination_Chemistry/Structure_and_Nomenclature_of_Coordination_Compounds/Coordination_Numbers_and_Geometry/Molecular_Examples), /content/body/pre/@function, line 1, column 1 at wiki.page() at (Courses/University_of_California_Davis/Chem_124A:_Fundamentals_of_Inorganic_Chemistry/08:_Coordination_Chemistry/8.02:_Structure_and_Nomenclature_of_Coordination_Compounds/8.2.02:_Coordination_Numbers_and_Geometry/8.2.2.02:_Molecular_Examples), /content/body/div[1]/pre, line 2, column 14 Coordination Number 2 The linear [Ag(NH 3 ) 2 ] + ion Although [Ag(en)]ClO 4 involves a normally bidentate ligand, in this case the structure is polymeric and the silver ion still retains a CN=2 with the N atoms (from different ligands) at ~180 degrees to each other. Coordination Number 3 Trigonal planar - D 3h [Cu(CN) 3 ] 2- [Cu(PPh 3 ) 2 Br] To help view more easily, the H atoms are turned off. Trigonal pyramid T-shaped [Rh(PPh 3 ) 3 ] + To help view more easily, the H atoms are turned off. Coordination Number 4 Tetrahedral Copyr 2 Cl 2 Square Planar cisplatin - cis-Pt(NH 3 ) 2 Cl 2 The cis- isomer is a powerful anti-cancer drug whereas the trans- is inactive. Coordination Number 5 Square pyramid Trigonal Bipyramid [Ni(CN) 5 ] 3- Coordination Number 6 Hexagonal planar Trigonal prism tris(cis-1,2-diphenylethene-1,2-dithiolato)rhenium The ReS6 geometry is perfectly trigonal prismatic. Octahedral Hexol The first 'truly' inorganic complex to be resolved into its optical isomers. [Co(en) 3 ]Cl 3 The classic example of optical isomerism in octahedral coordination complexes (H atoms not shown). [Co(NH 3 ) 5 CO 3 ] + Coordination Number 7 Capped octahedron (C 3v ) K 3 [NbOF 6 ] Capped trigonal prism (C 2v ) [V(III)(Hedta)(H 2 O)]H 2 O Pentagonal Bipyramid (D 5h ) bis-(tert-butylacac) 2 (DMSO)di-oxoUranium The UO7 geometry fits a pentagonal bipyramid. Coordination Number 8 Dodecahedron (D 2d ) Zr(acac) 2 (NO 3 ) 2 [Zr(C 2 O 4 ) 4 ] 4- is reported to have this shape as well. Cube (O h ) Square antiprism (D 4d ) U(acac) 4 Hexagonal bipyramid (D 6h ) UO 2 (OAc) 3 Coordination Number 9 Three-face centred trigonal prism (D 3h ) Hydrated salts of the lanthanide elements eg Eu(H 2 O) 9 ] 3+ Coordination Number 10 Bicapped square antiprism (D 4d ) Tetrakis(nitrato-O,O')-bis(triphenylphosphine oxide) cerium(IV) Another example is [Ce(NO 3 ) 5 ] 2- Coordination Number 11 All-faced capped trigonal prism (D 3h ) This is not a common stereochemistry. In aqua-(12-crown-4)-tris(nitrato-O,O')-cerium(III) (12-crown-4) solvate and (15-crown-5)-tris(nitrato-O,O')-cerium(III) the Cerium ion is 11 coordinate. Coordination Number 12 cuboctahedron (Oh) Ceric ammonium nitrate -(NH 4 ) 2 Ce(NO 3 ) 6