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Halocuprates(I) crystallising with the Ph3PNPPh3 + cation: preparation and structural characterisation of (Ph3PNPPh3)2[Cu4Br6] and (Ph3PNPPh3)[CuBrCl]

Catrin Hasselgren (Institutionen för oorganisk kemi) ; Susan Jagner (Institutionen för material- och ytkemi, Oorganisk kemi ; Institutionen för oorganisk kemi)
Inorganica Chimica Acta (0020-1693). Vol. 336 (2002), p. 137-141.
[Artikel, refereegranskad vetenskaplig]

Two halocuprates(I) crystallising with the Ph3PNPPh3+ cation, (Ph3PNPPh3)(2)[Cu4Br6] (1) and (Ph3PNPPh3)[CuBrCl] (2), have been prepared and characterised by means of crystal-structure determination. The anion in 1 is a tetranuclear species composed of vertex-sharing copper(I)-bromide triangles. It may, alternatively, be described in terms of an octahedron of bromide ions containing a tetrahedron of copper(l) ions, There are two possible orientations of the copper(l) tetrahedron which results in partial occupancy of the crystallographic copper(l) sites. The anion in 2 is also disordered with bromide and chloride occupying the halide sites to differing degrees, resulting in the composition [CuBr1.46Cl0.54](-). In both compounds the Ph3PNPPh3+ cation exhibits an intramolecular claw-like conformation with offset face-to-face orientation of two phenyl rings but the orientation of the cation claws with respect to the anion differs considerably between the two compounds.

Nyckelord: copper(I), halide, bis(triphenylphosphoranylidene)ammonium, bromocuprate(I), chlorocuprate(I), crystal packing



Denna post skapades 2006-08-29. Senast ändrad 2013-06-04.
CPL Pubid: 464

 

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Institutioner (Chalmers)

Institutionen för oorganisk kemi (1900-2003)
Institutionen för material- och ytkemi, Oorganisk kemi (2002-2004)

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Kemi

Chalmers infrastruktur