Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Metal Complexes Co-ordination Numbers Four and Five

Inert Metal Complexes Co-ordination Numbers Four and Five [Pg.142]

Several investigations have demonstrated the possibility or probability of the existence of persistent five- or six-co-ordinate intermediates in the associative pathway for nucleophilic substitution. Examples include the reactions of [AuClJ with thiocyanate and with A-cyclohexylthiobenzamide and of cw-[Pt(N02)2-(NHs)2] with hydrogen bromide. The behaviour of stable five-co-ordinate compounds has been examined with a view to treating them as models for such transient intermediates in associative substitution at four-co-ordinate complexes (see Section 3). A thorough and unusually extensively referenced molecular orbital treatment of [Pg.142]

Reaction Mechanisms in Inorganic Chemistry , ed. M. L. Tobe, M.T.P. International Review of Science, Inorganic Chemistry Series Two, Vol. 9, Butterworths, London, 1974, p. 45. [Pg.142]

Peshchevitskii, A. V. Belyaev, R. L. Shchekochikhina, and G. D. Mal chikov, Kinetika Reaktsii Zameshcheniya Ligandov v Kompleksnykh Soedineniyakh Platinovykh Metallov i Zolota (Spravochnik), Nauka Sib. Otd., Novosibirsk, U.S.S.R., 1974. [Pg.142]

Two groups of authors have suggested that there is a difference between the detailed mechanism of associative nucleophilic substitution at platinum(ii) or palladium(ii) and that at gold(iii). It is claimed that there are indications that bondbreaking and bond-making are asynchronous (A mechanism) at Pt and Pd, but synchronous (/a mechanism) at This distinction is hardly consistent with [Pg.143]

More investigations into the reaction of platinum(ii)-ethene complexes with pyridine have been described. Further details of the attack of pyridine at the co- [Pg.153]

Of two general articles dealing with the trans effect in substitution at square-planar [Pg.154]

This chapter follows broadly the pattern set in earlier Reports. The description inert has been interpreted somewhat liberally in the brief sections on Cu and on the tetrahedral and five-co-ordinate complexes, and is perhaps justified on the grounds that a small amount of overlap is preferable to the existence of gaps. [Pg.115]




SEARCH



Co complexes

Co-ordinates

Co-ordination complexes

Co-ordination numbers

Co-ordinators

Complex numbers

Five co-ordinate

Five co-ordinate complexes

Five metals

Metal co-ordination

Ordinal

Ordinal numbers

© 2024 chempedia.info