Quadruple bond Quadruple bond A quadruple bond is a type of chemical bond between two atoms involving eight electrons. This bond is an extension of the more familiar types double bonds and triple bonds. Stable quadruple bonds are most common among the transition metals in the middle of the d-block, such as rhenium, tungsten, molybdenum and chromium. Typically the ligands that support quadruple bonds are π-donors, not π-acceptors. Chromium(II) acetate, Cr("μ"-OCCH)(HO), was the first chemical compound containing a quadruple bond to be synthesized. It was described in 1844 by E. Peligot, although its distinctive bonding was not recognized for more than a
Owned-and-operated television stations in the United States Corporation's CBS Television Stations subsidiary with the network instead of Fox's UPN-affiliated stations. In fact, two of the former Chris-Craft stations have the distinction of being owned-and-operated stations of two networks: WWOR-TV (the second in the New York City market after sister station WNYW, which has been an O&O of DuMont and Fox), and KCOP-TV (the first and only station in the Los Angeles market), both having been O&Os of UPN and MyNetworkTV. Viacom/CBS sold off several UPN owned-and-operated stations during the network's final five years. Mercury Broadcasting bought Wichita, Kansas' KSCC (channel 36, now KMTW) in 2001 (the station