transition metal compounds
41Heavy metal (chemistry) — A heavy metal is a member of a loosely defined subset of elements that exhibit metallic properties. It mainly includes the transition metals, some metalloids, lanthanides, and actinides. Many different definitions have been proposed some based on …
42coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… …
43Inorganic chemistry — For the journal, see Inorganic Chemistry (journal). Inorganic compounds show rich variety: A: Diborane features unusual bonding B: Caesium chloride has an archetypal crystal structure C: Fp2 is an organometallic complex D …
44colour — /kul euhr/, n., adj. v.t., v.i. Chiefly Brit. color. Usage. See or1. * * * I Aspect of any object that may be described in terms of hue, brightness, and saturation. It is associated with the visible wavelengths of electromagnetic radiation, which …
45Crystal field theory — (CFT) is a model that describes the electronic structure of transition metal compounds, all of which can be considered coordination complexes. CFT successfully accounts for some magnetic properties, colours, hydration enthalpies, and spinel… …
46Metallocene — General chemical structure of a Metallocene compound, where M is a metal cation A metallocene is a compound typically consisting of two cyclopentadienyl anions (Cp, which is C5H5 ) bound to a metal center (M) in the oxidation state II, with the… …
47Cyclopentadienyl complex — Zirconocene dichloride, a cyclopentadienyl complex A cyclopentadienyl complex is a metal complex with one or more cyclopentadienyl groups (C5H5−, abbreviated as Cp−). Based on the type of bonding between the metals and the cyclopentadienyl]]… …
48Metallcarbonyle — Nickeltetracarbonyl, das erste bekannte Metallcarbonyl Metallcarbonyle sind Komplexverbindungen von Übergangsmetallen mit Kohlenstoffmonoxid Liganden. Sie treten in Form neutraler Komplexe, als positiv geladene Metallcarbonyl Kationen oder als… …
49Bleaching of wood pulp — is the chemical processing carried out on various types of wood pulp to decrease the color of the pulp, so that it becomes whiter. The main use of wood pulp is to make paper where whiteness (similar to but not exactly the same as brightness ) is… …
50VSEPR theory — Valence shell electron pair repulsion (VSEPR) theory is a model in chemistry used to predict the shape of individual molecules based upon the extent of electron pair electrostatic repulsion.[1] It is also named Gillespie–Nyholm theory after its… …
