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 television stations were on the UHF band, along with the fact it saw the advantage of having a statewide network to share California news coverage and events with, using the resources of KFSN, KGO-TV and KABC-TV. By the time the Fox network launched in October 1986, many of the nation's VHF stations were already affiliated with one of the "Big Three" networks. As a result, Fox had little choice but to affiliate with UHF stations in most markets upon its launch (the few VHF outlets that the network initially affiliated with, a few of which were owned by Fox itself,