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  2. Cis effect - Wikipedia

    en.wikipedia.org/wiki/Cis_effect

    In inorganic chemistry, the cis effect is defined as the labilization (or destabilization) of CO ligands that are cis to other ligands. CO is a well-known strong pi-accepting ligand in organometallic chemistry that will labilize in the cis position when adjacent to ligands due to steric and electronic effects.

  3. Metal carbonyl - Wikipedia

    en.wikipedia.org/wiki/Metal_carbonyl

    The carbonyl ligand engages in a wide range of bonding modes in metal carbonyl dimers and clusters. In the most common bridging mode, denoted μ 2 or simply μ, the CO ligand bridges a pair of metals. This bonding mode is observed in the commonly available metal carbonyls: Co 2 (CO) 8, Fe 2 (CO) 9, Fe 3 (CO) 12, and Co 4 (CO) 12.

  4. Tanabe–Sugano diagram - Wikipedia

    en.wikipedia.org/wiki/Tanabe–Sugano_diagram

    Considering both weak and strong ligand fields, a Tanabe–Sugano diagram shows the energy splitting of the spectral terms with the increase of the ligand field strength. It is possible for us to understand how the energy of the different configuration states is distributed at certain ligand strengths.

  5. Spectrochemical series - Wikipedia

    en.wikipedia.org/wiki/Spectrochemical_series

    A spectrochemical series is a list of ligands ordered by ligand "strength", and a list of metal ions based on oxidation number, group and element.For a metal ion, the ligands modify the difference in energy Δ between the d orbitals, called the ligand-field splitting parameter in ligand field theory, or the crystal-field splitting parameter in crystal field theory.

  6. Transition metal carbonate and bicarbonate complexes

    en.wikipedia.org/wiki/Transition_metal_carbonate...

    In the covalent bond classification method, κ 1-carbonate is anX ligand and κ 2-carbonate is an X 2 ligand. With two metals, the number of bonding modes increases because carbonate often serves as a bridging ligand. It can span metal-metal bonds as in [Ru 2 (CO 3) 4 Cl 2] 5-, where again it functions as an (X) 2 ligand.

  7. Ligand - Wikipedia

    en.wikipedia.org/wiki/Ligand

    3 orbitals of low energy: d xy, d xz and d yz and; 2 orbitals of high energy: d z 2 and d x 2 −y 2. The energy difference between these 2 sets of d-orbitals is called the splitting parameter, Δ o. The magnitude of Δ o is determined by the field-strength of the ligand: strong field ligands, by definition, increase Δ o more than weak

  8. Ligand field theory - Wikipedia

    en.wikipedia.org/wiki/Ligand_field_theory

    That is, the unoccupied d orbitals of transition metals participate in bonding, which influences the colors they absorb in solution. In ligand field theory, the various d orbitals are affected differently when surrounded by a field of neighboring ligands and are raised or lowered in energy based on the strength of their interaction with the ...

  9. Charge-transfer band - Wikipedia

    en.wikipedia.org/wiki/Charge-transfer_band

    Prussian blue is intensely blue owing to an intervalence charge transfer band. Intervalence charge transfer (IVCT) is a type of charge-transfer band that is associated with mixed-valence compounds. Unlike the usual MLCT or LMCT bands, the IVCT bands are lower in energy, usually in the visible or near-infrared region of the spectrum and is broad ...

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