Suitably-aligned f atomic orbitals can overlap to form a φ molecular orbital (a φ bond)
In chemistry, phi bonds (φ bonds) are covalent chemical bonds, where six lobes of one involved atomic orbital overlap six lobes of the other involved atomic orbital. This overlap leads to the formation of a bonding molecular orbital with three nodal planes which contain the internuclear axis and go through both atoms.
The Greek letter φ in their name refers to f orbitals, since the orbital symmetry of the φ bond is the same as that of the usual (6-lobed) type of f orbital when seen down the bond axis.
There was one possible candidate known in 2005 of a molecule with phi bonding (a U−U bond, in the molecule U2).[1] However, later studies that accounted for spin orbit interactions found that the bonding was only of fourth order.[2][3][4] Experimental evidence for phi bonding between a thorium atom and cyclooctatetraene in thorocene has been supported by computational analysis, though this mixed-orbital bond has strong ionic character and is not a traditional covalent phi bond.[5]
^Gagliardi, Laura; Roos, Björn O. (2005). "Quantum chemical calculations show that the uranium molecule U2 has a quintuple bond". Nature. 433 (7028): 848–851. Bibcode:2005Natur.433..848G. doi:10.1038/nature03249. PMID 15729337. S2CID 421380.
^T. A. Manz (2017). "Introducing DDEC6 atomic population analysis: part 3. Comprehensive method to compute bond orders". RSC Adv. 7 (72): 45552–45581. Bibcode:2017RSCAd...745552M. doi:10.1039/c7ra07400j.
^"The diuranium molecule has a quadruple bond". chab.ethz.ch. Retrieved 2020-03-21.
^Knecht, Stefan; Jensen, Hans Jørgen Aa; Saue, Trond (January 2019). "Relativistic quantum chemical calculations show that the uranium molecule U 2 has a quadruple bond". Nature Chemistry. 11 (1): 40–44. doi:10.1038/s41557-018-0158-9. ISSN 1755-4349. PMID 30374039. S2CID 53112083.
^Minasian, Stefan G.; Keith, Jason M.; Batista, Enrique R.; Boland, Kevin S.; Clark, David L.; Kozimor, Stosh A.; Martin, Richard L.; Shuh, David K.; Tyliszczak, Tolek (2014). "New evidence for 5f covalency in actinocenes determined from carbon K-edge XAS and electronic structure theory". Chem. Sci. 5 (1): 351–359. doi:10.1039/C3SC52030G. ISSN 2041-6520.
molecule with phibonding (a U−U bond, in the molecule U2). However, later studies that accounted for spin orbit interactions found that the bonding was only...
as phi bonds corresponding to overlap of f atomic orbitals, are possible. There is no known example of a molecule purported to contain a phibond. For...
The Honor Society of Phi Kappa Phi (or simply Phi Kappa Phi or ΦΚΦ) is an honor society established in 1897 to recognize and encourage superior scholarship...
standard of morality". These cardinal principles are contained in The Bond of Phi Delta Theta, the document to which each member pledges on his initiation...
sensitive compounds? Are there any molecules that certainly contain a phibond? Is there a less labor- or energy-intensive technique for titanium refinement...
the only fraternity to hold a constitutional bond with a historically African-American sorority, Zeta Phi Beta (ΖΦΒ), which was founded on January 16,...
engineering Nuclear fuel cycle Nuclear physics Quintuple bond (earlier thought to be a phibond), in the molecule U2 Thorium fuel cycle World Uranium Hearing...
fraternal bond through means of carefully selected associates." Phi Beta Delta merged into Pi Lambda Phi on February 1, 1941. At the time, Pi Lambda Phi had...
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...
Phi Kappa Psi (ΦΚΨ), commonly known as Phi Psi, is an American collegiate social fraternity that was founded at Jefferson College in Canonsburg, Pennsylvania...
formula –C 6H 5. It is the substituent form of the cycloalkane benzene. phibond photon A carrier of electromagnetic radiation of all wavelengths (such...
{\displaystyle \Phi _{I}=\left\vert a{\overline {a}}\right\vert +\left\vert {\overline {b}}b\right\vert } This wavefunction describes the bonding in H2 as the...
( T ) . {\displaystyle \phi (t+T)=\phi (t)\phi ^{-1}(0)\phi (T).} Here ϕ − 1 ( 0 ) ϕ ( T ) {\displaystyle \phi ^{-1}(0)\phi (T)} is known as the monodromy...
Phi Sigma Kappa (ΦΣΚ), colloquially known as Phi Sig or PSK, is a men's social and academic fraternity with approximately 74 active chapters and provisional...
Phi Alpha (ΘΦΑ), commonly known as Theta Phi, is a women's fraternity founded at the University of Michigan – Ann Arbor on August 30, 1912. Theta Phi...
Phi Delta Chi (ΦΔΧ or Phi Dex) is a coed. professional fraternity founded in 1883, at the University of Michigan in Ann Arbor, Michigan. It was formed...
U.S. securities laws. Milken's compensation while head of the high-yield bond department at Drexel Burnham Lambert in the late 1980s exceeded $1 billion...
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...
participating in the chemical bond. It was introduced in 1929 by Sir John Lennard-Jones with the description of bonding in the diatomic molecules of the...
The skeletal formula, line-angle formula, bond-line formula or shorthand formula of an organic compound is a type of molecular structural formula that...
Delta Xi Phi (ΔΞΦ) is a national multicultural sorority that was founded at the University of Illinois at Urbana-Champaign by fifteen women on April 20...
Roman David Bilal Sharif Milton Suarez Psi Sigma Phi's fraternal goal is to establish a unique bond among men of different cultures. This goal is accomplished...
Jimmy Carter. He is the son of William Langhorne Bond. Bond died on January 29, 2022, aged 84. Bond was born in Shanghai, China. In 1955, he graduated...
is a list of notable members of Phi Sigma Kappa men's collegiate fraternity, including those who were members of Phi Sigma Epsilon prior to the 1985 merger...
Global Information
