Bickeldefines the political question doctrine, in the passage quoted in sec-tion I, in terms of the Court's sense of unease at straying into thedecision of difficult and delicate questions involving the separationof powers and requiring political expertise or sensitivity to makean intelligent decision.
A chelate is a chemical compound composed of a metal ion and a chelating agent. A chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand. An example of a simple chelating agent is ethylenediamine.ethylenediamine. A single molecule of ethylenediamine can form two bonds to a transition-metal ion such as nickel(II), Ni 2+ .n other words, a chelating agent is a multidentate ligand. An example of a simple chelating agent is ethylenediamine. ethylenediamine. A single molecule of ethylenediamine can form two bonds to a transition-metal ion such as nickel(II), Ni 2+ .
Structures With Bidentate Ligands. Bidentate ligands are Lewis bases that donate two pairs (bi) of electrons to a metal atom. Bidentate ligands are often referred to as chelating ligands (chelate is derived from the Greek word for claw) because they can grab a metal atom in two places.A complex that contains a chelating ligand is called a chelate. Fe = O = C oxalate ion (ox)Oxalate ion is a bidentate ligand even though it contains four O atoms which have lone pairs of electrons. [Fe(C2O4)3]3-In this complex, three oxalate ions are bonded to the Fe atom. The coordination number of 6 results in an octahedral structure.