slide1 n.
Skip this Video
Loading SlideShow in 5 Seconds..
Coordination Principle PowerPoint Presentation
Download Presentation
Coordination Principle

play fullscreen
1 / 14
Download Presentation

Coordination Principle - PowerPoint PPT Presentation

kiri
283 Views
Download Presentation

Coordination Principle

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

    1. 1 Coordination Principle GLY 4200 Fall, 2011

    2. 2 Electrostatic Attraction Anions and cations cluster together because they are attracted electrostatically The clusters form coordination arrays

    3. 3 Ionic Bonding The coordinated ions always cluster about the coordinating ion in such a way that their centers lie at the apices of a polyhedron For bonding that is non-ionic, the same general principles hold

    4. 4 Coordination Number The number of coordinated ions around a central ion is known as the coordination number (CN)

    5. 5 Radius Ratio The radius ratio is the ratio of the cation (note: this is Rc) to the anion (Ra) or (R+/R-) Since anions are almost always larger than cations, the ratio is between zero and one

    6. 6 Fit Perfect Cation large, pushes anions apart Cation small, rattles around (unstable)

    7. 7 Common Configurations

    8. 8 Linear

    9. 9 Trigonal Planar

    10. 10 Tetrahedral

    11. 11 Square Planar

    12. 12 Octahedral

    13. 13 Cubic

    14. 14 Radius Ratio Computation