Lazu may refer to several villages in Romania: Lazu, a village in Agigea Commune, Constanţa County Lazu, a village in Terpezița Commune, Dolj County Lazu, a village in Malovăț Commune, Mehedinţi County Lazu, a village in Gherghești Commune, Vaslui County Lazu may refer to village in India Lazu, Arunachal Pradesh, a village in Tirap district of Arunachal Pradesh in India. == See also == Lazu River (disambiguation) Laz (disambiguation)...

An auxochrome (Greek αὐξάνειν auxánein: "to increase" and χρῶμα chrōma: "colour") is a group of atoms attached to a chromophore which modifies the ability of that chromophore to absorb light. They themselves fail to produce the colour; but when present along with the chromophores in an organic compound intensifies the colour of the chromogen. Examples include the hydroxyl group (-OH), the amino group (-NH2), the aldehyde group (-CHO), and the methyl mercaptan group (-SMe). An auxochrome is a functional group of atoms with nonbonded electrons when attached to a chromophore, alters both the wavelength...

Copper is a chemical element with symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color. It is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys. Copper is found as a pure metal in nature, and this was the source of the first metal to be used by humans, ca. 8,000 BC; it was the first metal to be smelted from its ore, ca. 5,000 BC; it was the first metal to be cast into a shape...

Organocopper compounds in organometallic chemistry contain carbon to copper chemical bonds. Organocopper chemistry is the science of organocopper compounds describing their physical properties, synthesis and reactions. They are reagents in organic chemistry. The first organocopper compound, the explosive copper(I) acetylide Cu2C2 (Cu-C≡C-Cu), was synthesized by Rudolf Christian Böttger in 1859 by passing acetylene gas through copper(I) chloride solution: C2H2 + 2 CuCl → Cu2C2 + 2 HCl Henry Gilman prepared methylcopper in 1936. In 1941, Kharash discovered that reaction of a Grignard reagent with...