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- W94495697 abstract "This chapter reviews aromatic compounds of the transition elements. Classifications of aromatic compounds of the transition metals are described in the following manner: compounds in which an aromatic nucleus is symmetrically bound to a transition metal by overlap of ring π-orbitals with metal d-orbitals of correct symmetry. These are analogous to metal cyclopentadienyls (metallocenes) in which the aromatic system is C 5 H 5 Ө and all the available six π-electrons are assumed to take part in bonding. In compounds, which consist of an aromatic nucleus bound unsymmetrically to a transition metal, only part of the π-electron density is used for bonding. On the other hand, there are compounds in which an aromatic ring is σ-bonded to a transition metal with the loss of one hydrogen atom, for example ., triphenyltris (tetrahydrofuran) chromium. The study explores eight groups of transition elements describing metal π-arene complexes: they are Group VIA (Cr, Mo, W); Group I VA ( Ti, Zr, Hf); Group VA ( V, Nb, Ta); Group VIIA (Mn, Tc, Re); Group VIII (Fe, Ru, Os); Group VIII (Co, Rh, lr); Group VIII (Ni, Pd, Pt);Group IB ( Cu, Ag, Au) and Hg. Complexes of the tropylium (cycioheptatrienylium) ion are discussed in the concluding part of the chapter." @default.
- W94495697 created "2016-06-24" @default.
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- W94495697 date "1964-01-01" @default.
- W94495697 modified "2023-09-25" @default.
- W94495697 title "Aromatic Compounds of the Transition Elements" @default.
- W94495697 doi "https://doi.org/10.1016/b978-044453345-6.50608-8" @default.
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