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  2. Charge-transfer band - Wikipedia

    en.wikipedia.org/wiki/Charge-transfer_band

    [1] CT absorptions bands are intense and often lie in the ultraviolet or visible portion of the spectrum. For coordination complexes, charge-transfer bands often exhibit molar absorptivities, ε, of about 50000 L mol −1 cm −1. By contrast ε values for d–d transitions are in the range of 20–200 L mol −1 cm −1.

  3. Charge-transfer complex - Wikipedia

    en.wikipedia.org/wiki/Charge-transfer_complex

    In chemistry, charge-transfer (CT) complex, or electron donor-acceptor complex, describes a type of supramolecular assembly of two or more molecules or ions. The assembly consists of two molecules that self-attract through electrostatic forces, i.e., one has at least partial negative charge and the partner has partial positive charge, referred ...

  4. Laporte rule - Wikipedia

    en.wikipedia.org/wiki/Laporte_rule

    For example, the d-d transitions for [Cr(NH 3) 5 Cl] 2+ are weak (ε < 100) even though the complex is only of C 4v symmetry. [5] The Laporte rule helps explain the intense colors often observed for the tetrahedral complexes. The tetrahedral point group lacks the inversion operation, so the Laporte rule does not apply. [6]

  5. Hexaamminecobalt(III) chloride - Wikipedia

    en.wikipedia.org/wiki/Hexaamminecobalt(III)_chloride

    Hexaamminecobalt(III) chloride is the chemical compound with the formula [Co(NH 3) 6]Cl 3.It is the chloride salt of the coordination complex [Co(NH 3) 6] 3+, which is considered an archetypal "Werner complex", named after the pioneer of coordination chemistry, Alfred Werner.

  6. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.

  7. cis-Dichlorobis(ethylenediamine)cobalt(III) chloride - Wikipedia

    en.wikipedia.org/wiki/Cis-Dichlorobis(ethylenedi...

    cis-Dichlorobis(ethylenediamine)cobalt(III) chloride is a salt with the formula [CoCl 2 (en) 2]Cl (en = ethylenediamine). The salt consists of a cationic coordination complex and a chloride anion. It is a violet diamagnetic solid that is soluble in water.

  8. Vanadyl acetylacetonate - Wikipedia

    en.wikipedia.org/wiki/Vanadyl_acetylacetonate

    The VO(acac) 2 –TBHP system exclusively epoxidizes geraniol at the allylic alcohol position, leaving the other alkene of geraniol untouched. By comparison, m -CPBA , another epoxidizing agent, reacts with both alkenes, creating the products in a two to one ratio favoring reaction at the alkene away from the hydroxyl group .

  9. Associative substitution - Wikipedia

    en.wikipedia.org/wiki/Associative_substitution

    V = z 1 z 2 e 2 /4πaε. Where z is the charge number of each species and ε is the vacuum permittivity. A typical value for K E is 0.0202 dm 3 mol −1 for neutral particles at a distance of 200 pm. [9] The result of the rate law is that at high concentrations of Y, the rate approximates k[M] tot while at low concentrations the result is kK E ...

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