Halogenocuprate ions

Dinuclear anions, halogenocuprate(I) and halo-genoargentate(I) ions four-coordinated metal centers, 37 20-21 three-coordinated metal centers, 37 8-9, 12-16... 

Direct Synthesis reaction, 6 393-408 Discrete monomeric anions, halogenocuprate and halogenorgenate(I) ions, 37 2-6 Disilacyclohexadienes, 29 12-13 Disilacyclohexanes, 29 12 Disilanes... 

Pemamethylenetetra7ole, 32 206, 207 Pemanuclear anions halo-chalcogenates(ll), 35 287-288 halogenocuprate(I) and halogenoargenatate(I) ions, 37 22, 24... 

Polymeric anions, four-coordinated metal centers, halogenocuprate(I) and halogenoar-gentate(I) ions, 37 26-32 miscellaneous, 37 31-32... 

In the following presentation, solid-state structures documented hitherto for halogenocuprate(I) and halogenoargentate(I) ions are described in order of increasing coordination number of the metal, Possible correlations between the coordination number of copper(I) or silver(I) in the anion and properties of the cation with which it is coprecipitated, such as size, shape, and exposure of the positive charge, are then discussed. 

Discrete trinuclear halogenocuprate(I) or halogenoargentate(I) species containing solely three-coordinated metal centers have not been reported hitherto. An [Ag3I6]3 ion in which one of the silver(I) atoms is three coordinated, whereas the remaining two exhibit tetrahedral coordination geometry has, however, recently been isolated (81) (cf Section II,C,3). 

Extreme diversity is exhibited in the coupling of metal halide tetra-hedra to form polymeric halogenocuprate(I) and halogenoargentate(I) ions, there being an abundance of different types of infinite chains, layers, and three-dimensional arrays. Because the object of this article is to focus on variations in metal coordination number, and, in particular, on trends associated with the nature of the cation, structural description will be limited to those types of polymeric anion most frequently encountered hitherto in crystalline halogenocuprates(I) and halogenoargentates(I). 

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