Chemical bond involving eight electrons; has one sigma, two pi, and one delta 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 of covalent bonds: double bonds and triple bonds.[1] Stable quadruple bonds are most common among the transition metals in the middle of the d-block, such as rhenium, tungsten, technetium, molybdenum and chromium. Typically the ligands that support quadruple bonds are π-donors, not π-acceptors. Quadruple bonds are rare as compared to double bonds and triple bonds, but hundreds of compounds with such bonds have been prepared.[2]
The structure of chromium(II) acetate contains a quadruple Cr–Cr bond.
^Radius, U.; Breher, F. (2006). "'To Boldly Pass the Metal–Metal Quadruple Bond". Angew. Chem. Int. Ed.45 (19): 3006–3010. doi:10.1002/anie.200504322.
^Cotton, F. Albert; Wilkinson, Geoffrey (1988). "23. Metal-to-metal bonds and metal atom clusters". Advanced Inorganic Chemistry (5th ed.). John Wiley and Sons. p. 1089. ISBN 0-471-84997-9.
A quadruplebond is a type of chemical bond between two atoms involving eight electrons. This bond is an extension of the more familiar types of covalent...
blue salt is well known as an early example of a compound featuring quadruplebond between its metal centers. Although the compound has no practical value...
compute bond orders". RSC Adv. 7 (72): 45552–45581. Bibcode:2017RSCAd...745552M. doi:10.1039/c7ra07400j. "The diuranium molecule has a quadruplebond". chab...
O=CCl2, the bond order between carbon and oxygen is 2, and between carbon and chlorine is 1. In some molecules, bond orders can be 4 (quadruplebond), 5 (quintuple...
conclude that this is a very strong bond. Experimentally, the Re-Re bond in [Re2Cl8]-2 was found to be a quadruplebond. This method of determination is...
Mo–Mo bond length of 202 pm. The compound was synthesised starting from potassium octachlorodimolybdate (which already contains a Mo2 quadruplebond) and...
suggested instead that a quadruplebond exists, an interpretation that was disputed. CASSCF calculations indicate that the quadruplebond based on molecular...
is of historic interest as one of the earliest illustrations of a quadruplebonding. The salt is usually obtained as the pink-coloured dihydrate. The...
conformation. This sterically unfavorable geometry is given as evidence for a quadruplebond between the Mo centers. Experiments such as X-ray and electron diffraction...
pair of atoms. Quadruple bonds are extremely rare and can be formed only between transition metal atoms, and consist of one sigma bond, two pi bonds and...
chromium(II) acetate (Cr2(O2CCH3)4) is somewhat famous. It features a Cr-Cr quadruplebond. A large number of chromium(III) compounds are known, such as chromium(III)...
a Compound Containing the Octachloroditungstate (Tungsten-Tungsten QuadrupleBond) Ion, [W2Cl8]4-". Journal of the American Chemical Society. 104 (24):...
In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods...
internuclear axis. A triple bond consists of three shared electron pairs, forming one sigma and two pi bonds. An example is nitrogen. Quadruple and higher bonds...
chromium(II) acetate (Cr2(O2CCH3)4) is somewhat famous. It features a Cr-Cr quadruplebond. A large number of chromium(III) compounds are known, such as chromium(III)...
July 2012. Bond at World Rowing Bond at World Rowing Sinkovic at World Rowing Alex Gregory at World Rowing Rabe at World Rowing "Men's Quadruple Sculls Final...
acetate Basic zinc acetate Molybdenum(II) acetate, illustrating the Mo-Mo quadruplebond. [CoO(acetate)]4, the "Das cubane" For simple carboxylates, the acetate...
suitable for the pairing of electrons to form chemical bonds in valence bond theory. For example, in a carbon atom which forms four single bonds, the...
Dimers: Electrochemical Insights into the Nature of the Metal–Metal QuadrupleBond". Inorganic Chemistry. 60 (11): 8315–8321. doi:10.1021/acs.inorgchem...
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