Ethers ( /ˈiːθər/) are a class of organic compounds that contain an ether group — an oxygen atom connected to two alkyl or aryl groups — of general formula R–O–R'. A typical example is the solvent and anesthetic diethyl ether, commonly referred to simply as "ether" (CH₃-CH₂-O-CH₂-CH₃). Ethers are common in organic chemistry and pervasive in biochemistry, as they are common linkages in carbohydrates and lignin.

Ethers feature C-O-C linkage defined by a bond angle of about 104.5° and C-O distances of about 140 pm. The barrier to rotation about the C-O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp³.

Oxygen is more electronegative than carbon, thus the hydrogens alpha to ethers are more acidic than in simple hydrocarbons. They are far less acidic than hydrogens alpha to carbonyl groups (such as in ketones or aldehydes), however.

1) Simple ethers or symmetrical ethers 2) Mixed ethers or asymmetrical ethers

Tristan Murail (born March 11, 1947 in Le Havre, France) is a French composer associated with the "spectral" technique of composition.

His father, Gérard Murail, is a poet and his mother, Marie-Thérèse Barrois, a journalist. One of his brothers, Lorris Murail, and his younger sister Elvire Murail, aka Moka, also write, and his younger sister Marie-Aude Murail is a French children's writer.

Following early studies in economics and classical and North African Arabic, Murail studied composition with Olivier Messiaen at the Paris Conservatoire from 1967 to 1972. He taught computer music at the Paris Conservatoire and composition at IRCAM in Paris, where he assisted in the development of the Patchwork composition software. In 1973 he was a founding member of the Ensemble l'Itinéraire. Since 1997 he has been a professor of composition at Columbia University in New York City.

Murail is associated with the "spectral" technique of composition, which involves the use of the fundamental properties of sound as a basis for harmony, as well as the use of spectral analysis, FM, RM, and AM synthesis as a method of deriving polyphony.

Marion "Suge" Knight, Jr. ( /ˈʃʊɡ/; born April 19, 1965) (a.k.a. Big Suge or Big Simon) is the founder and CEO of Black Kapital Records and co-founder and former CEO of Death Row Records. Death Row Records rose to dominate the rap charts after Dr. Dre's breakthrough album The Chronic in 1992. After several years of chart successes for artists including Tupac Shakur, Dr. Dre, Snoop Dogg, Outlawz, and Tha Dogg Pound, Death Row Records stagnated after Knight's incarceration on parole violation charges in September 1996.

Marion Hugh Knight was born in Compton, California. His name, Suge, derives from "Sugar Bear", a childhood nickname. He attended Lynwood High School, then graduated and got a football scholarship to University of Nevada, Las Vegas, where he went and played football for several years. After school, he played professionally for the Los Angeles Rams as a replacement player during the 1987 NFL strike. Later, he found work as a concert promoter and a bodyguard for celebrities including Bobby Brown.