The 18-electron rule is a chemical rule of thumb used primarily for predicting and rationalizing formulas for stable transition metal complexes, especially...

octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in...

Tolman's rule states that, in certain chemical reactions, the steps involve exclusively intermediates of 18- and 16 electron configuration. The rule is an...

and oxygen, 18-electron rule in inorganic chemistry and organometallic chemistry of transition metals, Hückel's rule for the π-electrons of aromatic compounds...

This tendency is called the 18-electron rule, because each bonded atom has 18 valence electrons including shared electrons. The heavy group 2 elements...

shell diagrams. Periodic table (electron configurations) Electron counting 18-electron rule Core charge Re: Why do electron shells have set limits ? madsci...

are 18 one-sided pentominoes. In the classification of finite simple groups, there are 18 infinite families of groups. The 18-electron rule is a rule of...

 'building-up principle'), also called the Aufbau rule, states that in the ground state of an atom or ion, electrons first fill subshells of the lowest available...

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure)...

rule, the 18-electron rule, and Hückel's 4n + 2 pi-electron rule are proven to be useful in predicting the molecular stability. Wade's rules were formulated...

creating a very stable complex, which satisfies the 18-electron rule. The cis-labilization of 18 e− complexes suggests that dissociation of ligand X in...

Most species with the formula Mx(CO)y follow the 18-electron rule, whereas V(CO)6 has 17 valence electrons. According to the original synthesis by Calderazzo...

bonding in transition metal carbonyl complexes which abide by the 18-electron rule, and others arguing the molecule more accurately contains ionic bonds...

proposed the 16 and 18 electron rule, extending Irving Langmuir's 18-Electron rule to include the many examples of stable 16 electron square planar d8 complexes...

available. The formulae of many metal carbonyls can be inferred from the 18-electron rule. Group 2 elements calcium, strontium, and barium can all form octacarbonyl...

orbital of the ligand. Bridging carbonyl Dewar–Chatt–Duncanson model 18-electron rule Ligand field theory Pi-donor ligands Miessler, Gary L.; Tarr, Donald...

are the five d, one s and three p orbitals with the corresponding 18-electron rule, spxdy hybridisation is used to model the shape of these molecules...

with a low-spin 3d6 octahedral Co(III) center. The cation obeys the 18-electron rule and is considered to be a classic example of an exchange inert metal...

ions. The s, p, and d orbitals of the metal can accommodate 18 electrons (see 18-Electron rule). The maximum coordination number for a certain metal is thus...

which determines the oxidation states. The formula conforms to the 18-electron rule and the complex adopts octahedral geometry with six carbonyl ligands...

be found using the 18-electron rule, saying that the valence shells of a transition metal will collectively accommodate 18 electrons, whereas the symmetry...

share their electrons. Apparent violations of the 18-electron rule sometimes are explicable in compounds with unusual hapticities: The 18-VE complex...

reinforce fundamental topics in organometallic chemistry like d-electron count, the 18-electron rule, oxidation state, valency, and the isolobal analogy. Many...

generally be ruled out if the original metal complex fulfilled the 18-electron rule because the two metal–oxygen bonds would exceed the 18 electron rule. The...

In solid-state physics, the electron mobility characterizes how quickly an electron can move through a metal or semiconductor when pushed or pulled by...

enforced by the 18-electron rule, since CpFe(CO)2(η1-C3H5) is already an 18-electron complex, while an η3-allyl ligand would result in an electron count of 20...

(oxidation state zero) and [Fe(CO) 4]2− (oxidation state −2) in which the 18-electron rule is obeyed. These complexes are also covalent. Ionic compounds are mostly...

in other areas of chemistry, electron counting is useful for organizing organometallic chemistry. The 18-electron rule is helpful in predicting the stabilities...

In chemistry the polyhedral skeletal electron pair theory (PSEPT) provides electron counting rules useful for predicting the structures of clusters such...

complex to comply with the 18-electron rule and maximise stability. The equivalent iron(II) complex undergoes a reversible one-electron reduction (at −0.48 V...