Chapter 22

Card Set Information

Author:
clydethedog
ID:
16160
Filename:
Chapter 22
Updated:
2010-05-03 16:05:39
Tags:
Chemistry Chang
Folders:

Description:
chang22
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user clydethedog on FreezingBlue Flashcards. What would you like to do?


  1. Properties of the Transition metals: Trends
    • typically have incompletely filled d subshells or readily give rise to ions with incompletely filled subshells (Zn, Cd, Hg are not considered T.M.'s)
    • great tendency to from complex ions
    • distinctive color
    • paramagnetic compounds
    • catalytic activity
    • trend of size change is minimal - electrons go to inner shell instead out outer
  2. General Physical Properties of Transition Metals
    • Small size and "closest packing" crystal structure give rise to strong metallic bonds
    • high densities
    • high melting/boiling points
    • high ^ fus/vap
    • highest oxidation states occur with very electronegative atoms like F or O
  3. Coordination compound
    • a neutral species containing one or more complex ion
    • -complex ion - contains a central metal cation bonded to one or more anions or molecules with lone pairs
    • [Co(NH3)6]Cl3
  4. ligands
    • the small molecules or ions attached to the central metal
    • has one or more electron pair that can be donated to the metal (they are Lewis bases)
  5. donor atom
    the atom in a ligand bound directly to the metal atom
  6. coordination number (C.N.)
    the number of donor atoms around a central atom
  7. monodentate
    • ligand with one donor atom
    • :C---O:
  8. bidentate
    ligand with two donor atoms
  9. polydentate
    ligand with more than two donor atoms
  10. chelating agents
    bidentate and polydentate ligands (Greek chele means "claw")
  11. Bromide ligand
    • Br-
    • Bromo
  12. Chloride ligand
    • Cl-
    • Chloro
  13. common bidentate and polydentate ligands
    • ethylenediamine (en) - neutral
    • oxalate ion, 2-
    • ethylenediaminetetraacetate (EDTA), 4-
  14. Naming Coordination Compounds
    • 1. Cation is named before the anion, regardless of which contains complex ion
    • 2. Within a complex ion the ligands are named 1st in alphabetical order then the metal
    • 3. Ligands: anionic end in -o, neutral usu name of molecule,
    • 4. When several ligans: di, tri, tetra, penta, hexa
    • 5. If the ligand itself already has the prefix in it's name: bis, tris, tetrakis
    • 6. Give the oxidation # of the metal as a Roman Numeral
    • 7.If complex is is an anion, its name ends in -ate
  15. Cyanide ligand
    • CN-
    • Cyano
  16. Hydroxide ligand
    • OH-
    • Hydroxo
  17. Oxide ligand
    • O-2
    • Oxo
  18. Carbonate ligand
    • Co3 -2
    • carbonato
  19. Nitrite ligand
    • NO2 -
    • nitro
  20. ammonia ligand
    • NH3
    • ammine
  21. carbon monoxide ligand
    • CO
    • Carbonyl
  22. water ligand
    • H2O
    • aqua
  23. Metal w/ligand
    Aluminum
    Aluminate
  24. Copper w/ligand
    cuprate
  25. gold w/ligand
    aurate
  26. iron w/ligand
    ferrate
  27. lead w/ligand
    plumbate
  28. silver w/ligand
    argentate
  29. tin w/ligand
    stannate
  30. tungsten w/ligand
    tungstate
  31. Stereoisomers
    compounds that are made up of the same types and numbers of atoms bonded together in the same sequence but with different spatial arrangements
  32. Geometric isomers
    • stereoisomers that cannot be converted without breaking chemical bonds
    • cis - two groups are adjacent to each other
    • trans - two groups are on opposite sides of the structure
  33. optical isomers
    • nonsuperimposable mirror images
    • "chiral" (hand) mirror immage that isn't the same
    • they are OPTICALLY ACTIVE 0 they can rotate plane-plarized light
    • if compound rotates it right it is "dextrorotatory" (d)
    • if it rotates light left it is "levorotatory" (l)
  34. enantiomers
    the d and l isomers of a chiral molecule
  35. racemic mixture
    50/50 mixture of the two enantiomers
  36. Crystal Field Theory
    the bonding theory used to account for the color and magnetic properties of T.M. complexes
  37. crystal field splitting
    • ^ the energy difference between two sets of d orbitals in a metal atom when ligands are present
    • the size of ^ is affected by the metal and the ligand
    • ^ = hc/(lambda)
  38. color
    • an object appears black if it absorbs all colors of white light
    • an object appears white if it does not absorb any colors of white light
    • an object appears green if it absorbs all colors except green light (reflecting it back to your eye) or...
    • an object appears green if it absorbs only the "complimentary" color
  39. spectrochemical series
    • is a list of ligands in order of increasing ability to split the d orbital energies
    • the stronger field ligands will have a larger splitting ^ and higher energy light is being absorbed

What would you like to do?

Home > Flashcards > Print Preview