Pulled molecular strings and stacked molecular decks: Chelate-ring formation vs. metal-metal bridging in dicopper(I) complexes of 2,2'-bipyrimidine with diphosphine ligands of variable polymethylene chain length

, , und . Chemistry - A European Journal 2 (4): 446--451 (1996)


The self-assembly reaction between bischelating 2,2'-bipyrimidine (bpym), metallic Cu, Cu2+, and two equiv. of bidentate Ph2P(CH2)nPPh2 produces crystallog. characterized dinuclear complexes with a CuI(m-bpym)CuI2+ core and chelating (n = 5) or bridging diphosphine ligands (n = 6, 8). The bridging type may be designated as inverse cryptate arrangements. The structural data of the solids and the spectroscopic results for the dissolved species indicate a strained configuration in the case of (m-bpym)Cu2μ-Ph2P(CH2)nPPh222+ with n = 6. Once the polymethylene chain length is reduced one notch further to n = 5, the diphosphines can no longer bridge but help to form eight-membered chelate rings. In this complex there is a distortion towards a trigonal-pyramidal coordination geometry at the Cu(I) centers, which is supported by the formation of an org. sandwich arrangement between the central bpym acceptor and two phosphino Ph rings. on SciFinder(R)

Links und Ressourcen

Suchen auf:

Kommentare und Rezensionen  

Es gibt bisher keine Rezension oder Kommentar. Sie können eine schreiben!


Zitieren Sie diese Publikation