Propose a structural formula for the cation at m/z 41 observed in the massspectrum of

Ligands o Monodentate  Only coordinates to the metal at one spot on molecule o Bidentate & Polydentate  Can coordinate to the metal at multiple spots  Typically larger molecules  i.e. Ethylenediamine (en) below  Formation Constants o Complex with larger formation constant forms more favorably o K fiffer because of Gibbs Free Energy  Chelate Effect (kee-late)  Larger K fave larger change in entropy  Chelating Agents o Remove or separate metal ions from a solution o i.e. EDTA removes poisonous trace metals in food  Energy in Coordinate Chemistry o Ligand’s electrons are attracted to metal cation  Increases energy of the d-orbitals o Crystal Field Splitting  Difference in energy among d-orbitals based on ligand geometry  Used to explain many observations about coordinate chemistry, such as color and magnetism  Octohedral Geometry  Ligands are along x, y, z axes  Raises energy of d z2and d x -yorbitals the most  Raises energy of other d orbitals less  Tetrahedral Geometry  Ligands come between axes 2 2 2  Raises energy of d z and d x -y orbitals less  Raises energy of other d orbitals th