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Friday, February 7, 2014

Ligand

Ligand . Introduction Ligand is an Ion or molecule that binds to a central admixturelic element particle to form a coordination complex. The bond certificateing between metallic element and ligand by and large involves formal donation of oneness or more of the ligands electron pairs. The nature of metal-ligand bonding rouse lop from covalent to ionic. Furthermore, the metal-ligand bond gild can range from one to three. Ligands are viewed as Lewis bases, although rare cases are known involving Lewis acid ligands.[1][2] Metal and met on the wholeoids are bound to ligands in virtually all circumstances, although gaseous stark naked metal ions can be generated in high vacuum. Ligands in a complex govern the reactivity of the central atom, including ligand commutation rates, the reactivity of the ligands themselves, and redox. Ligand selection is a critical consideration in some practical areas, including bioinorganic and medicinal chemistry, homogeneous catalysis, and e nvironmental chemistry. Ligands are classified in many ways: their charge, size (bulk), the identity of the coordinating atom(s), and the number of electrons donated to the metal (denticity or hapticity). The size of a ligand is indicated by its cone angle. | atomic number 27 complex [HCo(CO)4] with five ligands Contents substantial heavens and loose field ligands Classification of ligands as L and X Polydentate and polyhapto ligand motifs and oral communication Common ligands Ligand exchange Strong field and weak field ligands briny article: Crystal field theory In general, ligands are viewed as donating electrons and electrostatic molecules to the central atom. Bonding is a lot described using the formalisms of molecular orbital theory. In general, electron pairs occupy the gentleman (Highest Occupied Molecular Orbital) of the ligands. Ligands and metal ions can be tell in many ways; one ranking system of rules focuses on ligand hardness. Metal ions pickentially b ind plastered ligands. In general, hard met! al ions prefer weak field ligands, whereas soft metal ions prefer strong...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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