Complexes Flashcards
What is a complex
Made up of ligand coordinately bonded to a central metal ion
What is a ligand
Neutral or charged species with a lone pair to donate to form coordinate bonds with central metal ion
What is coordination number
Of a transition metal complex is the total number of coordinate bonds formed with the central metal ion
What is a ligand according to Lewis
Base as donates electrons to metal ion
What is central metal ion according to Lewis
Acid as it accepts electrons from ligands
Common ligands
Cl-, H2O, NH3
What are monodentate ligands
Each form one coordinate bond eg H2O, Cl-, NH3
What are bidentate ligands
Each form two coordinate bonds eg NH2CH2CH2NH2
What are hexadentate ligands
Each form six coordinate bonds eg EDTA4-
What are multidentate ligands
General term for any ligands that forms more than one coordinate bond
How to name NH3 ligand
Ammine
How to name H2O ligand
Aqua
How to name CO ligand
Carbonyl
How to name OH- ligand
Hydroxo
How to name Cl- ligand
Chloro
How to name CN- ligand
Cyano
How to name CH3NH2 ligand
Methylamine
Formula for ethanedioate ion/oxalate
C2O4 2-
What colour are Cu+ in aqueous solution
Blue
What is a chelate
A complex formed of ligands that are bi/multidentate (not monodentate)
Shortened name for diamine ligand
en
Shortened name for oxalate ligand
Ox
Where do lone pairs come from to form bonds from ethanedioate ion to central metal ion
From the two oxygen atoms with single bonds to the carbon atoms
