Coordination Numbers & Geometry definitions Flashcards
Coordination Numbers & Geometry definitions
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Coordination Number Indicates the number of ligands attached to a central metal cation in a coordination complex. Ligand An ion or molecule that binds to a central metal atom to form a coordination complex. Central Metal Cation The positively charged metal ion at the center of a coordination complex. Linear Geometry A molecular shape formed when two ligands are attached to a central atom, creating a straight line. Octahedral Geometry A molecular shape formed when six ligands are symmetrically arranged around a central atom. Tetrahedral Geometry A molecular shape formed when four ligands are symmetrically arranged around a central atom, typical for d10 metals. Square Planar Geometry A molecular shape formed when four ligands are arranged in a square plane around a central atom, typical for d8 metals. Electron Configuration The distribution of electrons of an atom or molecule in atomic or molecular orbitals. Complex Ion A charged species consisting of a central metal cation bonded to one or more ligands. d10 Configuration An electron configuration where the d subshell is fully filled with 10 electrons, leading to tetrahedral geometry. d8 Configuration An electron configuration where the d subshell has 8 electrons, leading to square planar geometry.
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